true,
		);

		foreach ( $queries as $key => $query ) {
			if ( 'relation' === $key ) {
				$cleaned_query['relation'] = $this->sanitize_relation( $query );

				// First-order clause.
			} elseif ( self::is_first_order_clause( $query ) ) {

				$cleaned_clause          = array_merge( $defaults, $query );
				$cleaned_clause['terms'] = (array) $cleaned_clause['terms'];
				$cleaned_query[]         = $cleaned_clause;

				/*
				 * Keep a copy of the clause in the flate
				 * $queried_terms array, for use in WP_Query.
				 */
				if ( ! empty( $cleaned_clause['taxonomy'] ) && 'NOT IN' !== $cleaned_clause['operator'] ) {
					$taxonomy = $cleaned_clause['taxonomy'];
					if ( ! isset( $this->queried_terms[ $taxonomy ] ) ) {
						$this->queried_terms[ $taxonomy ] = array();
					}

					/*
					 * Backward compatibility: Only store the first
					 * 'terms' and 'field' found for a given taxonomy.
					 */
					if ( ! empty( $cleaned_clause['terms'] ) && ! isset( $this->queried_terms[ $taxonomy ]['terms'] ) ) {
						$this->queried_terms[ $taxonomy ]['terms'] = $cleaned_clause['terms'];
					}

					if ( ! empty( $cleaned_clause['field'] ) && ! isset( $this->queried_terms[ $taxonomy ]['field'] ) ) {
						$this->queried_terms[ $taxonomy ]['field'] = $cleaned_clause['field'];
					}
				}

				// Otherwise, it's a nested query, so we recurse.
			} elseif ( is_array( $query ) ) {
				$cleaned_subquery = $this->sanitize_query( $query );

				if ( ! empty( $cleaned_subquery ) ) {
					// All queries with children must have a relation.
					if ( ! isset( $cleaned_subquery['relation'] ) ) {
						$cleaned_subquery['relation'] = 'AND';
					}

					$cleaned_query[] = $cleaned_subquery;
				}
			}
		}

		return $cleaned_query;
	}

	/**
	 * Sanitizes a 'relation' operator.
	 *
	 * @since 4.1.0
	 *
	 * @param string $relation Raw relation key from the query argument.
	 * @return string Sanitized relation ('AND' or 'OR').
	 */
	public function sanitize_relation( $relation ) {
		if ( 'OR' === strtoupper( $relation ) ) {
			return 'OR';
		} else {
			return 'AND';
		}
	}

	/**
	 * Determines whether a clause is first-order.
	 *
	 * A "first-order" clause is one that contains any of the first-order
	 * clause keys ('terms', 'taxonomy', 'include_children', 'field',
	 * 'operator'). An empty clause also counts as a first-order clause,
	 * for backward compatibility. Any clause that doesn't meet this is
	 * determined, by process of elimination, to be a higher-order query.
	 *
	 * @since 4.1.0
	 *
	 * @param array $query Tax query arguments.
	 * @return bool Whether the query clause is a first-order clause.
	 */
	protected static function is_first_order_clause( $query ) {
		return is_array( $query ) && ( empty( $query ) || array_key_exists( 'terms', $query ) || array_key_exists( 'taxonomy', $query ) || array_key_exists( 'include_children', $query ) || array_key_exists( 'field', $query ) || array_key_exists( 'operator', $query ) );
	}

	/**
	 * Generates SQL clauses to be appended to a main query.
	 *
	 * @since 3.1.0
	 *
	 * @param string $primary_table     Database table where the object being filtered is stored (eg wp_users).
	 * @param string $primary_id_column ID column for the filtered object in $primary_table.
	 * @return string[] {
	 *     Array containing JOIN and WHERE SQL clauses to append to the main query.
	 *
	 *     @type string $join  SQL fragment to append to the main JOIN clause.
	 *     @type string $where SQL fragment to append to the main WHERE clause.
	 * }
	 */
	public function get_sql( $primary_table, $primary_id_column ) {
		$this->primary_table     = $primary_table;
		$this->primary_id_column = $primary_id_column;

		return $this->get_sql_clauses();
	}

	/**
	 * Generates SQL clauses to be appended to a main query.
	 *
	 * Called by the public WP_Tax_Query::get_sql(), this method
	 * is abstracted out to maintain parity with the other Query classes.
	 *
	 * @since 4.1.0
	 *
	 * @return string[] {
	 *     Array containing JOIN and WHERE SQL clauses to append to the main query.
	 *
	 *     @type string $join  SQL fragment to append to the main JOIN clause.
	 *     @type string $where SQL fragment to append to the main WHERE clause.
	 * }
	 */
	protected function get_sql_clauses() {
		/*
		 * $queries are passed by reference to get_sql_for_query() for recursion.
		 * To keep $this->queries unaltered, pass a copy.
		 */
		$queries = $this->queries;
		$sql     = $this->get_sql_for_query( $queries );

		if ( ! empty( $sql['where'] ) ) {
			$sql['where'] = ' AND ' . $sql['where'];
		}

		return $sql;
	}

	/**
	 * Generates SQL clauses for a single query array.
	 *
	 * If nested subqueries are found, this method recurses the tree to
	 * produce the properly nested SQL.
	 *
	 * @since 4.1.0
	 *
	 * @param array $query Query to parse (passed by reference).
	 * @param int   $depth Optional. Number of tree levels deep we currently are.
	 *                     Used to calculate indentation. Default 0.
	 * @return string[] {
	 *     Array containing JOIN and WHERE SQL clauses to append to a single query array.
	 *
	 *     @type string $join  SQL fragment to append to the main JOIN clause.
	 *     @type string $where SQL fragment to append to the main WHERE clause.
	 * }
	 */
	protected function get_sql_for_query( &$query, $depth = 0 ) {
		$sql_chunks = array(
			'join'  => array(),
			'where' => array(),
		);

		$sql = array(
			'join'  => '',
			'where' => '',
		);

		$indent = '';
		for ( $i = 0; $i < $depth; $i++ ) {
			$indent .= '  ';
		}

		foreach ( $query as $key => &$clause ) {
			if ( 'relation' === $key ) {
				$relation = $query['relation'];
			} elseif ( is_array( $clause ) ) {

				// This is a first-order clause.
				if ( $this->is_first_order_clause( $clause ) ) {
					$clause_sql = $this->get_sql_for_clause( $clause, $query );

					$where_count = count( $clause_sql['where'] );
					if ( ! $where_count ) {
						$sql_chunks['where'][] = '';
					} elseif ( 1 === $where_count ) {
						$sql_chunks['where'][] = $clause_sql['where'][0];
					} else {
						$sql_chunks['where'][] = '( ' . implode( ' AND ', $clause_sql['where'] ) . ' )';
					}

					$sql_chunks['join'] = array_merge( $sql_chunks['join'], $clause_sql['join'] );
					// This is a subquery, so we recurse.
				} else {
					$clause_sql = $this->get_sql_for_query( $clause, $depth + 1 );

					$sql_chunks['where'][] = $clause_sql['where'];
					$sql_chunks['join'][]  = $clause_sql['join'];
				}
			}
		}

		// Filter to remove empties.
		$sql_chunks['join']  = array_filter( $sql_chunks['join'] );
		$sql_chunks['where'] = array_filter( $sql_chunks['where'] );

		if ( empty( $relation ) ) {
			$relation = 'AND';
		}

		// Filter duplicate JOIN clauses and combine into a single string.
		if ( ! empty( $sql_chunks['join'] ) ) {
			$sql['join'] = implode( ' ', array_unique( $sql_chunks['join'] ) );
		}

		// Generate a single WHERE clause with proper brackets and indentation.
		if ( ! empty( $sql_chunks['where'] ) ) {
			$sql['where'] = '( ' . "\n  " . $indent . implode( ' ' . "\n  " . $indent . $relation . ' ' . "\n  " . $indent, $sql_chunks['where'] ) . "\n" . $indent . ')';
		}

		return $sql;
	}

	/**
	 * Generates SQL JOIN and WHERE clauses for a "first-order" query clause.
	 *
	 * @since 4.1.0
	 *
	 * @global wpdb $wpdb The WordPress database abstraction object.
	 *
	 * @param array $clause       Query clause (passed by reference).
	 * @param array $parent_query Parent query array.
	 * @return array {
	 *     Array containing JOIN and WHERE SQL clauses to append to a first-order query.
	 *
	 *     @type string[] $join  Array of SQL fragments to append to the main JOIN clause.
	 *     @type string[] $where Array of SQL fragments to append to the main WHERE clause.
	 * }
	 */
	public function get_sql_for_clause( &$clause, $parent_query ) {
		global $wpdb;

		$sql = array(
			'where' => array(),
			'join'  => array(),
		);

		$join  = '';
		$where = '';

		$this->clean_query( $clause );

		if ( is_wp_error( $clause ) ) {
			return self::$no_results;
		}

		$terms    = $clause['terms'];
		$operator = strtoupper( $clause['operator'] );

		if ( 'IN' === $operator ) {

			if ( empty( $terms ) ) {
				return self::$no_results;
			}

			$terms = implode( ',', $terms );

			/*
			 * Before creating another table join, see if this clause has a
			 * sibling with an existing join that can be shared.
			 */
			$alias = $this->find_compatible_table_alias( $clause, $parent_query );
			if ( false === $alias ) {
				$i     = count( $this->table_aliases );
				$alias = $i ? 'tt' . $i : $wpdb->term_relationships;

				// Store the alias as part of a flat array to build future iterators.
				$this->table_aliases[] = $alias;

				// Store the alias with this clause, so later siblings can use it.
				$clause['alias'] = $alias;

				$join .= " LEFT JOIN $wpdb->term_relationships";
				$join .= $i ? " AS $alias" : '';
				$join .= " ON ($this->primary_table.$this->primary_id_column = $alias.object_id)";
			}

			$where = "$alias.term_taxonomy_id $operator ($terms)";

		} elseif ( 'NOT IN' === $operator ) {

			if ( empty( $terms ) ) {
				return $sql;
			}

			$terms = implode( ',', $terms );

			$where = "$this->primary_table.$this->primary_id_column NOT IN (
				SELECT object_id
				FROM $wpdb->term_relationships
				WHERE term_taxonomy_id IN ($terms)
			)";

		} elseif ( 'AND' === $operator ) {

			if ( empty( $terms ) ) {
				return $sql;
			}

			$num_terms = count( $terms );

			$terms = implode( ',', $terms );

			$where = "(
				SELECT COUNT(1)
				FROM $wpdb->term_relationships
				WHERE term_taxonomy_id IN ($terms)
				AND object_id = $this->primary_table.$this->primary_id_column
			) = $num_terms";

		} elseif ( 'NOT EXISTS' === $operator || 'EXISTS' === $operator ) {

			$where = $wpdb->prepare(
				"$operator (
					SELECT 1
					FROM $wpdb->term_relationships
					INNER JOIN $wpdb->term_taxonomy
					ON $wpdb->term_taxonomy.term_taxonomy_id = $wpdb->term_relationships.term_taxonomy_id
					WHERE $wpdb->term_taxonomy.taxonomy = %s
					AND $wpdb->term_relationships.object_id = $this->primary_table.$this->primary_id_column
				)",
				$clause['taxonomy']
			);

		}

		$sql['join'][]  = $join;
		$sql['where'][] = $where;
		return $sql;
	}

	/**
	 * Identifies an existing table alias that is compatible with the current query clause.
	 *
	 * We avoid unnecessary table joins by allowing each clause to look for
	 * an existing table alias that is compatible with the query that it
	 * needs to perform.
	 *
	 * An existing alias is compatible if (a) it is a sibling of `$clause`
	 * (ie, it's under the scope of the same relation), and (b) the combination
	 * of operator and relation between the clauses allows for a shared table
	 * join. In the case of WP_Tax_Query, this only applies to 'IN'
	 * clauses that are connected by the relation 'OR'.
	 *
	 * @since 4.1.0
	 *
	 * @param array $clause       Query clause.
	 * @param array $parent_query Parent query of $clause.
	 * @return string|false Table alias if found, otherwise false.
	 */
	protected function find_compatible_table_alias( $clause, $parent_query ) {
		$alias = false;

		// Sanity check. Only IN queries use the JOIN syntax.
		if ( ! isset( $clause['operator'] ) || 'IN' !== $clause['operator'] ) {
			return $alias;
		}

		// Since we're only checking IN queries, we're only concerned with OR relations.
		if ( ! isset( $parent_query['relation'] ) || 'OR' !== $parent_query['relation'] ) {
			return $alias;
		}

		$compatible_operators = array( 'IN' );

		foreach ( $parent_query as $sibling ) {
			if ( ! is_array( $sibling ) || ! $this->is_first_order_clause( $sibling ) ) {
				continue;
			}

			if ( empty( $sibling['alias'] ) || empty( $sibling['operator'] ) ) {
				continue;
			}

			// The sibling must both have compatible operator to share its alias.
			if ( in_array( strtoupper( $sibling['operator'] ), $compatible_operators, true ) ) {
				$alias = preg_replace( '/\W/', '_', $sibling['alias'] );
				break;
			}
		}

		return $alias;
	}

	/**
	 * Validates a single query.
	 *
	 * @since 3.2.0
	 *
	 * @param array $query The single query. Passed by reference.
	 */
	private function clean_query( &$query ) {
		if ( empty( $query['taxonomy'] ) ) {
			if ( 'term_taxonomy_id' !== $query['field'] ) {
				$query = new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
				return;
			}

			// So long as there are shared terms, 'include_children' requires that a taxonomy is set.
			$query['include_children'] = false;
		} elseif ( ! taxonomy_exists( $query['taxonomy'] ) ) {
			$query = new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
			return;
		}

		if ( 'slug' === $query['field'] || 'name' === $query['field'] ) {
			$query['terms'] = array_unique( (array) $query['terms'] );
		} else {
			$query['terms'] = wp_parse_id_list( $query['terms'] );
		}

		if ( is_taxonomy_hierarchical( $query['taxonomy'] ) && $query['include_children'] ) {
			$this->transform_query( $query, 'term_id' );

			if ( is_wp_error( $query ) ) {
				return;
			}

			$children = array();
			foreach ( $query['terms'] as $term ) {
				$children   = array_merge( $children, get_term_children( $term, $query['taxonomy'] ) );
				$children[] = $term;
			}
			$query['terms'] = $children;
		}

		$this->transform_query( $query, 'term_taxonomy_id' );
	}

	/**
	 * Transforms a single query, from one field to another.
	 *
	 * Operates on the `$query` object by reference. In the case of error,
	 * `$query` is converted to a WP_Error object.
	 *
	 * @since 3.2.0
	 *
	 * @param array  $query           The single query. Passed by reference.
	 * @param string $resulting_field The resulting field. Accepts 'slug', 'name', 'term_taxonomy_id',
	 *                                or 'term_id'. Default 'term_id'.
	 */
	public function transform_query( &$query, $resulting_field ) {
		if ( empty( $query['terms'] ) ) {
			return;
		}

		if ( $query['field'] === $resulting_field ) {
			return;
		}

		$resulting_field = sanitize_key( $resulting_field );

		// Empty 'terms' always results in a null transformation.
		$terms = array_filter( $query['terms'] );
		if ( empty( $terms ) ) {
			$query['terms'] = array();
			$query['field'] = $resulting_field;
			return;
		}

		$args = array(
			'get'                    => 'all',
			'number'                 => 0,
			'taxonomy'               => $query['taxonomy'],
			'update_term_meta_cache' => false,
			'orderby'                => 'none',
		);

		// Term query parameter name depends on the 'field' being searched on.
		switch ( $query['field'] ) {
			case 'slug':
				$args['slug'] = $terms;
				break;
			case 'name':
				$args['name'] = $terms;
				break;
			case 'term_taxonomy_id':
				$args['term_taxonomy_id'] = $terms;
				break;
			default:
				$args['include'] = wp_parse_id_list( $terms );
				break;
		}

		if ( ! is_taxonomy_hierarchical( $query['taxonomy'] ) ) {
			$args['number'] = count( $terms );
		}

		$term_query = new WP_Term_Query();
		$term_list  = $term_query->query( $args );

		if ( is_wp_error( $term_list ) ) {
			$query = $term_list;
			return;
		}

		if ( 'AND' === $query['operator'] && count( $term_list ) < count( $query['terms'] ) ) {
			$query = new WP_Error( 'inexistent_terms', __( 'Inexistent terms.' ) );
			return;
		}

		$query['terms'] = wp_list_pluck( $term_list, $resulting_field );
		$query['field'] = $resulting_field;
	}
}
fication_email, $user, $blogname );

		wp_mail(
			$wp_new_user_notification_email['to'],
			wp_specialchars_decode( sprintf( $wp_new_user_notification_email['subject'], $blogname ) ),
			$wp_new_user_notification_email['message'],
			$wp_new_user_notification_email['headers']
		);

		if ( $switched_locale ) {
			restore_previous_locale();
		}
	}
endif;

if ( ! function_exists( 'wp_nonce_tick' ) ) :
	/**
	 * Returns the time-dependent variable for nonce creation.
	 *
	 * A nonce has a lifespan of two ticks. Nonces in their second tick may be
	 * updated, e.g. by autosave.
	 *
	 * @since 2.5.0
	 * @since 6.1.0 Added `$action` argument.
	 *
	 * @param string|int $action Optional. The nonce action. Default -1.
	 * @return float Float value rounded up to the next highest integer.
	 */
	function wp_nonce_tick( $action = -1 ) {
		/**
		 * Filters the lifespan of nonces in seconds.
		 *
		 * @since 2.5.0
		 * @since 6.1.0 Added `$action` argument to allow for more targeted filters.
		 *
		 * @param int        $lifespan Lifespan of nonces in seconds. Default 86,400 seconds, or one day.
		 * @param string|int $action   The nonce action, or -1 if none was provided.
		 */
		$nonce_life = apply_filters( 'nonce_life', DAY_IN_SECONDS, $action );

		return ceil( time() / ( $nonce_life / 2 ) );
	}
endif;

if ( ! function_exists( 'wp_verify_nonce' ) ) :
	/**
	 * Verifies that a correct security nonce was used with time limit.
	 *
	 * A nonce is valid for 24 hours (by default).
	 *
	 * @since 2.0.3
	 *
	 * @param string     $nonce  Nonce value that was used for verification, usually via a form field.
	 * @param string|int $action Should give context to what is taking place and be the same when nonce was created.
	 * @return int|false 1 if the nonce is valid and generated between 0-12 hours ago,
	 *                   2 if the nonce is valid and generated between 12-24 hours ago.
	 *                   False if the nonce is invalid.
	 */
	function wp_verify_nonce( $nonce, $action = -1 ) {
		$nonce = (string) $nonce;
		$user  = wp_get_current_user();
		$uid   = (int) $user->ID;
		if ( ! $uid ) {
			/**
			 * Filters whether the user who generated the nonce is logged out.
			 *
			 * @since 3.5.0
			 *
			 * @param int        $uid    ID of the nonce-owning user.
			 * @param string|int $action The nonce action, or -1 if none was provided.
			 */
			$uid = apply_filters( 'nonce_user_logged_out', $uid, $action );
		}

		if ( empty( $nonce ) ) {
			return false;
		}

		$token = wp_get_session_token();
		$i     = wp_nonce_tick( $action );

		// Nonce generated 0-12 hours ago.
		$expected = substr( wp_hash( $i . '|' . $action . '|' . $uid . '|' . $token, 'nonce' ), -12, 10 );
		if ( hash_equals( $expected, $nonce ) ) {
			return 1;
		}

		// Nonce generated 12-24 hours ago.
		$expected = substr( wp_hash( ( $i - 1 ) . '|' . $action . '|' . $uid . '|' . $token, 'nonce' ), -12, 10 );
		if ( hash_equals( $expected, $nonce ) ) {
			return 2;
		}

		/**
		 * Fires when nonce verification fails.
		 *
		 * @since 4.4.0
		 *
		 * @param string     $nonce  The invalid nonce.
		 * @param string|int $action The nonce action.
		 * @param WP_User    $user   The current user object.
		 * @param string     $token  The user's session token.
		 */
		do_action( 'wp_verify_nonce_failed', $nonce, $action, $user, $token );

		// Invalid nonce.
		return false;
	}
endif;

if ( ! function_exists( 'wp_create_nonce' ) ) :
	/**
	 * Creates a cryptographic token tied to a specific action, user, user session,
	 * and window of time.
	 *
	 * @since 2.0.3
	 * @since 4.0.0 Session tokens were integrated with nonce creation.
	 *
	 * @param string|int $action Scalar value to add context to the nonce.
	 * @return string The token.
	 */
	function wp_create_nonce( $action = -1 ) {
		$user = wp_get_current_user();
		$uid  = (int) $user->ID;
		if ( ! $uid ) {
			/** This filter is documented in wp-includes/pluggable.php */
			$uid = apply_filters( 'nonce_user_logged_out', $uid, $action );
		}

		$token = wp_get_session_token();
		$i     = wp_nonce_tick( $action );

		return substr( wp_hash( $i . '|' . $action . '|' . $uid . '|' . $token, 'nonce' ), -12, 10 );
	}
endif;

if ( ! function_exists( 'wp_salt' ) ) :
	/**
	 * Returns a salt to add to hashes.
	 *
	 * Salts are created using secret keys. Secret keys are located in two places:
	 * in the database and in the wp-config.php file. The secret key in the database
	 * is randomly generated and will be appended to the secret keys in wp-config.php.
	 *
	 * The secret keys in wp-config.php should be updated to strong, random keys to maximize
	 * security. Below is an example of how the secret key constants are defined.
	 * Do not paste this example directly into wp-config.php. Instead, have a
	 * {@link https://api.wordpress.org/secret-key/1.1/salt/ secret key created} just
	 * for you.
	 *
	 *     define('AUTH_KEY',         ' Xakm<o xQy rw4EMsLKM-?!T+,PFF})H4lzcW57AF0U@N@< >M%G4Yt>f`z]MON');
	 *     define('SECURE_AUTH_KEY',  'LzJ}op]mr|6+![P}Ak:uNdJCJZd>(Hx.-Mh#Tz)pCIU#uGEnfFz|f ;;eU%/U^O~');
	 *     define('LOGGED_IN_KEY',    '|i|Ux`9<p-h$aFf(qnT:sDO:D1P^wZ$$/Ra@miTJi9G;ddp_<q}6H1)o|a +&JCM');
	 *     define('NONCE_KEY',        '%:R{[P|,s.KuMltH5}cI;/k<Gx~j!f0I)m_sIyu+&NJZ)-iO>z7X>QYR0Z_XnZ@|');
	 *     define('AUTH_SALT',        'eZyT)-Naw]F8CwA*VaW#q*|.)g@o}||wf~@C-YSt}(dh_r6EbI#A,y|nU2{B#JBW');
	 *     define('SECURE_AUTH_SALT', '!=oLUTXh,QW=H `}`L|9/^4-3 STz},T(w}W<I`.JjPi)<Bmf1v,HpGe}T1:Xt7n');
	 *     define('LOGGED_IN_SALT',   '+XSqHc;@Q*K_b|Z?NC[3H!!EONbh.n<+=uKR:>*c(u`g~EJBf#8u#R{mUEZrozmm');
	 *     define('NONCE_SALT',       'h`GXHhD>SLWVfg1(1(N{;.V!MoE(SfbA_ksP@&`+AycHcAV$+?@3q+rxV{%^VyKT');
	 *
	 * Salting passwords helps against tools which has stored hashed values of
	 * common dictionary strings. The added values makes it harder to crack.
	 *
	 * @since 2.5.0
	 *
	 * @link https://api.wordpress.org/secret-key/1.1/salt/ Create secrets for wp-config.php
	 *
	 * @param string $scheme Authentication scheme (auth, secure_auth, logged_in, nonce).
	 * @return string Salt value
	 */
	function wp_salt( $scheme = 'auth' ) {
		static $cached_salts = array();
		if ( isset( $cached_salts[ $scheme ] ) ) {
			/**
			 * Filters the WordPress salt.
			 *
			 * @since 2.5.0
			 *
			 * @param string $cached_salt Cached salt for the given scheme.
			 * @param string $scheme      Authentication scheme. Values include 'auth',
			 *                            'secure_auth', 'logged_in', and 'nonce'.
			 */
			return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme );
		}

		static $duplicated_keys;
		if ( null === $duplicated_keys ) {
			$duplicated_keys = array(
				'put your unique phrase here' => true,
			);

			/*
			 * translators: This string should only be translated if wp-config-sample.php is localized.
			 * You can check the localized release package or
			 * https://i18n.svn.wordpress.org/<locale code>/branches/<wp version>/dist/wp-config-sample.php
			 */
			$duplicated_keys[ __( 'put your unique phrase here' ) ] = true;

			foreach ( array( 'AUTH', 'SECURE_AUTH', 'LOGGED_IN', 'NONCE', 'SECRET' ) as $first ) {
				foreach ( array( 'KEY', 'SALT' ) as $second ) {
					if ( ! defined( "{$first}_{$second}" ) ) {
						continue;
					}
					$value                     = constant( "{$first}_{$second}" );
					$duplicated_keys[ $value ] = isset( $duplicated_keys[ $value ] );
				}
			}
		}

		$values = array(
			'key'  => '',
			'salt' => '',
		);
		if ( defined( 'SECRET_KEY' ) && SECRET_KEY && empty( $duplicated_keys[ SECRET_KEY ] ) ) {
			$values['key'] = SECRET_KEY;
		}
		if ( 'auth' === $scheme && defined( 'SECRET_SALT' ) && SECRET_SALT && empty( $duplicated_keys[ SECRET_SALT ] ) ) {
			$values['salt'] = SECRET_SALT;
		}

		if ( in_array( $scheme, array( 'auth', 'secure_auth', 'logged_in', 'nonce' ), true ) ) {
			foreach ( array( 'key', 'salt' ) as $type ) {
				$const = strtoupper( "{$scheme}_{$type}" );
				if ( defined( $const ) && constant( $const ) && empty( $duplicated_keys[ constant( $const ) ] ) ) {
					$values[ $type ] = constant( $const );
				} elseif ( ! $values[ $type ] ) {
					$values[ $type ] = get_site_option( "{$scheme}_{$type}" );
					if ( ! $values[ $type ] ) {
						$values[ $type ] = wp_generate_password( 64, true, true );
						update_site_option( "{$scheme}_{$type}", $values[ $type ] );
					}
				}
			}
		} else {
			if ( ! $values['key'] ) {
				$values['key'] = get_site_option( 'secret_key' );
				if ( ! $values['key'] ) {
					$values['key'] = wp_generate_password( 64, true, true );
					update_site_option( 'secret_key', $values['key'] );
				}
			}
			$values['salt'] = hash_hmac( 'md5', $scheme, $values['key'] );
		}

		$cached_salts[ $scheme ] = $values['key'] . $values['salt'];

		/** This filter is documented in wp-includes/pluggable.php */
		return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme );
	}
endif;

if ( ! function_exists( 'wp_hash' ) ) :
	/**
	 * Gets hash of given string.
	 *
	 * @since 2.0.3
	 *
	 * @param string $data   Plain text to hash.
	 * @param string $scheme Authentication scheme (auth, secure_auth, logged_in, nonce).
	 * @return string Hash of $data.
	 */
	function wp_hash( $data, $scheme = 'auth' ) {
		$salt = wp_salt( $scheme );

		return hash_hmac( 'md5', $data, $salt );
	}
endif;

if ( ! function_exists( 'wp_hash_password' ) ) :
	/**
	 * Creates a hash (encrypt) of a plain text password.
	 *
	 * For integration with other applications, this function can be overwritten to
	 * instead use the other package password checking algorithm.
	 *
	 * @since 2.5.0
	 *
	 * @global PasswordHash $wp_hasher PHPass object
	 *
	 * @param string $password Plain text user password to hash.
	 * @return string The hash string of the password.
	 */
	function wp_hash_password( $password ) {
		global $wp_hasher;

		if ( empty( $wp_hasher ) ) {
			require_once ABSPATH . WPINC . '/class-phpass.php';
			// By default, use the portable hash from phpass.
			$wp_hasher = new PasswordHash( 8, true );
		}

		return $wp_hasher->HashPassword( trim( $password ) );
	}
endif;

if ( ! function_exists( 'wp_check_password' ) ) :
	/**
	 * Checks the plaintext password against the encrypted Password.
	 *
	 * Maintains compatibility between old version and the new cookie authentication
	 * protocol using PHPass library. The $hash parameter is the encrypted password
	 * and the function compares the plain text password when encrypted similarly
	 * against the already encrypted password to see if they match.
	 *
	 * For integration with other applications, this function can be overwritten to
	 * instead use the other package password checking algorithm.
	 *
	 * @since 2.5.0
	 *
	 * @global PasswordHash $wp_hasher PHPass object used for checking the password
	 *                                 against the $hash + $password.
	 * @uses PasswordHash::CheckPassword
	 *
	 * @param string     $password Plaintext user's password.
	 * @param string     $hash     Hash of the user's password to check against.
	 * @param string|int $user_id  Optional. User ID.
	 * @return bool False, if the $password does not match the hashed password.
	 */
	function wp_check_password( $password, $hash, $user_id = '' ) {
		global $wp_hasher;

		// If the hash is still md5...
		if ( strlen( $hash ) <= 32 ) {
			$check = hash_equals( $hash, md5( $password ) );
			if ( $check && $user_id ) {
				// Rehash using new hash.
				wp_set_password( $password, $user_id );
				$hash = wp_hash_password( $password );
			}

			/**
			 * Filters whether the plaintext password matches the encrypted password.
			 *
			 * @since 2.5.0
			 *
			 * @param bool       $check    Whether the passwords match.
			 * @param string     $password The plaintext password.
			 * @param string     $hash     The hashed password.
			 * @param string|int $user_id  User ID. Can be empty.
			 */
			return apply_filters( 'check_password', $check, $password, $hash, $user_id );
		}

		/*
		 * If the stored hash is longer than an MD5,
		 * presume the new style phpass portable hash.
		 */
		if ( empty( $wp_hasher ) ) {
			require_once ABSPATH . WPINC . '/class-phpass.php';
			// By default, use the portable hash from phpass.
			$wp_hasher = new PasswordHash( 8, true );
		}

		$check = $wp_hasher->CheckPassword( $password, $hash );

		/** This filter is documented in wp-includes/pluggable.php */
		return apply_filters( 'check_password', $check, $password, $hash, $user_id );
	}
endif;

if ( ! function_exists( 'wp_generate_password' ) ) :
	/**
	 * Generates a random password drawn from the defined set of characters.
	 *
	 * Uses wp_rand() to create passwords with far less predictability
	 * than similar native PHP functions like `rand()` or `mt_rand()`.
	 *
	 * @since 2.5.0
	 *
	 * @param int  $length              Optional. The length of password to generate. Default 12.
	 * @param bool $special_chars       Optional. Whether to include standard special characters.
	 *                                  Default true.
	 * @param bool $extra_special_chars Optional. Whether to include other special characters.
	 *                                  Used when generating secret keys and salts. Default false.
	 * @return string The random password.
	 */
	function wp_generate_password( $length = 12, $special_chars = true, $extra_special_chars = false ) {
		$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
		if ( $special_chars ) {
			$chars .= '!@#$%^&*()';
		}
		if ( $extra_special_chars ) {
			$chars .= '-_ []{}<>~`+=,.;:/?|';
		}

		$password = '';
		for ( $i = 0; $i < $length; $i++ ) {
			$password .= substr( $chars, wp_rand( 0, strlen( $chars ) - 1 ), 1 );
		}

		/**
		 * Filters the randomly-generated password.
		 *
		 * @since 3.0.0
		 * @since 5.3.0 Added the `$length`, `$special_chars`, and `$extra_special_chars` parameters.
		 *
		 * @param string $password            The generated password.
		 * @param int    $length              The length of password to generate.
		 * @param bool   $special_chars       Whether to include standard special characters.
		 * @param bool   $extra_special_chars Whether to include other special characters.
		 */
		return apply_filters( 'random_password', $password, $length, $special_chars, $extra_special_chars );
	}
endif;

if ( ! function_exists( 'wp_rand' ) ) :
	/**
	 * Generates a random non-negative number.
	 *
	 * @since 2.6.2
	 * @since 4.4.0 Uses PHP7 random_int() or the random_compat library if available.
	 * @since 6.1.0 Returns zero instead of a random number if both `$min` and `$max` are zero.
	 *
	 * @global string $rnd_value
	 *
	 * @param int $min Optional. Lower limit for the generated number.
	 *                 Accepts positive integers or zero. Defaults to 0.
	 * @param int $max Optional. Upper limit for the generated number.
	 *                 Accepts positive integers. Defaults to 4294967295.
	 * @return int A random non-negative number between min and max.
	 */
	function wp_rand( $min = null, $max = null ) {
		global $rnd_value;

		/*
		 * Some misconfigured 32-bit environments (Entropy PHP, for example)
		 * truncate integers larger than PHP_INT_MAX to PHP_INT_MAX rather than overflowing them to floats.
		 */
		$max_random_number = 3000000000 === 2147483647 ? (float) '4294967295' : 4294967295; // 4294967295 = 0xffffffff

		if ( null === $min ) {
			$min = 0;
		}

		if ( null === $max ) {
			$max = $max_random_number;
		}

		// We only handle ints, floats are truncated to their integer value.
		$min = (int) $min;
		$max = (int) $max;

		// Use PHP's CSPRNG, or a compatible method.
		static $use_random_int_functionality = true;
		if ( $use_random_int_functionality ) {
			try {
				// wp_rand() can accept arguments in either order, PHP cannot.
				$_max = max( $min, $max );
				$_min = min( $min, $max );
				$val  = random_int( $_min, $_max );
				if ( false !== $val ) {
					return absint( $val );
				} else {
					$use_random_int_functionality = false;
				}
			} catch ( Error $e ) {
				$use_random_int_functionality = false;
			} catch ( Exception $e ) {
				$use_random_int_functionality = false;
			}
		}

		/*
		 * Reset $rnd_value after 14 uses.
		 * 32 (md5) + 40 (sha1) + 40 (sha1) / 8 = 14 random numbers from $rnd_value.
		 */
		if ( strlen( $rnd_value ) < 8 ) {
			if ( defined( 'WP_SETUP_CONFIG' ) ) {
				static $seed = '';
			} else {
				$seed = get_transient( 'random_seed' );
			}
			$rnd_value  = md5( uniqid( microtime() . mt_rand(), true ) . $seed );
			$rnd_value .= sha1( $rnd_value );
			$rnd_value .= sha1( $rnd_value . $seed );
			$seed       = md5( $seed . $rnd_value );
			if ( ! defined( 'WP_SETUP_CONFIG' ) && ! defined( 'WP_INSTALLING' ) ) {
				set_transient( 'random_seed', $seed );
			}
		}

		// Take the first 8 digits for our value.
		$value = substr( $rnd_value, 0, 8 );

		// Strip the first eight, leaving the remainder for the next call to wp_rand().
		$rnd_value = substr( $rnd_value, 8 );

		$value = abs( hexdec( $value ) );

		// Reduce the value to be within the min - max range.
		$value = $min + ( $max - $min + 1 ) * $value / ( $max_random_number + 1 );

		return abs( (int) $value );
	}
endif;

if ( ! function_exists( 'wp_set_password' ) ) :
	/**
	 * Updates the user's password with a new encrypted one.
	 *
	 * For integration with other applications, this function can be overwritten to
	 * instead use the other package password checking algorithm.
	 *
	 * Please note: This function should be used sparingly and is really only meant for single-time
	 * application. Leveraging this improperly in a plugin or theme could result in an endless loop
	 * of password resets if precautions are not taken to ensure it does not execute on every page load.
	 *
	 * @since 2.5.0
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 *
	 * @param string $password The plaintext new user password.
	 * @param int    $user_id  User ID.
	 */
	function wp_set_password( $password, $user_id ) {
		global $wpdb;

		$hash = wp_hash_password( $password );
		$wpdb->update(
			$wpdb->users,
			array(
				'user_pass'           => $hash,
				'user_activation_key' => '',
			),
			array( 'ID' => $user_id )
		);

		clean_user_cache( $user_id );

		/**
		 * Fires after the user password is set.
		 *
		 * @since 6.2.0
		 *
		 * @param string $password The plaintext password just set.
		 * @param int    $user_id  The ID of the user whose password was just set.
		 */
		do_action( 'wp_set_password', $password, $user_id );
	}
endif;

if ( ! function_exists( 'get_avatar' ) ) :
	/**
	 * Retrieves the avatar `<img>` tag for a user, email address, MD5 hash, comment, or post.
	 *
	 * @since 2.5.0
	 * @since 4.2.0 Optional `$args` parameter added.
	 *
	 * @param mixed  $id_or_email   The Gravatar to retrieve. Accepts a user_id, gravatar md5 hash,
	 *                              user email, WP_User object, WP_Post object, or WP_Comment object.
	 * @param int    $size          Optional. Height and width of the avatar image file in pixels. Default 96.
	 * @param string $default_value URL for the default image or a default type. Accepts '404' (return
	 *                              a 404 instead of a default image), 'retro' (8bit), 'RoboHash' (robohash),
	 *                              'monsterid' (monster), 'wavatar' (cartoon face), 'indenticon' (the "quilt"),
	 *                              'mystery', 'mm', or 'mysteryman' (The Oyster Man), 'blank' (transparent GIF),
	 *                              or 'gravatar_default' (the Gravatar logo). Default is the value of the
	 *                              'avatar_default' option, with a fallback of 'mystery'.
	 * @param string $alt           Optional. Alternative text to use in img tag. Default empty.
	 * @param array  $args {
	 *     Optional. Extra arguments to retrieve the avatar.
	 *
	 *     @type int          $height        Display height of the avatar in pixels. Defaults to $size.
	 *     @type int          $width         Display width of the avatar in pixels. Defaults to $size.
	 *     @type bool         $force_default Whether to always show the default image, never the Gravatar. Default false.
	 *     @type string       $rating        What rating to display avatars up to. Accepts 'G', 'PG', 'R', 'X', and are
	 *                                       judged in that order. Default is the value of the 'avatar_rating' option.
	 *     @type string       $scheme        URL scheme to use. See set_url_scheme() for accepted values.
	 *                                       Default null.
	 *     @type array|string $class         Array or string of additional classes to add to the img element.
	 *                                       Default null.
	 *     @type bool         $force_display Whether to always show the avatar - ignores the show_avatars option.
	 *                                       Default false.
	 *     @type string       $loading       Value for the `loading` attribute.
	 *                                       Default null.
	 *     @type string       $extra_attr    HTML attributes to insert in the IMG element. Is not sanitized. Default empty.
	 * }
	 * @return string|false `<img>` tag for the user's avatar. False on failure.
	 */
	function get_avatar( $id_or_email, $size = 96, $default_value = '', $alt = '', $args = null ) {
		$defaults = array(
			// get_avatar_data() args.
			'size'          => 96,
			'height'        => null,
			'width'         => null,
			'default'       => get_option( 'avatar_default', 'mystery' ),
			'force_default' => false,
			'rating'        => get_option( 'avatar_rating' ),
			'scheme'        => null,
			'alt'           => '',
			'class'         => null,
			'force_display' => false,
			'loading'       => null,
			'fetchpriority' => null,
			'extra_attr'    => '',
			'decoding'      => 'async',
		);

		if ( empty( $args ) ) {
			$args = array();
		}

		$args['size']    = (int) $size;
		$args['default'] = $default_value;
		$args['alt']     = $alt;

		$args = wp_parse_args( $args, $defaults );

		if ( empty( $args['height'] ) ) {
			$args['height'] = $args['size'];
		}
		if ( empty( $args['width'] ) ) {
			$args['width'] = $args['size'];
		}

		// Update args with loading optimized attributes.
		$loading_optimization_attr = wp_get_loading_optimization_attributes( 'img', $args, 'get_avatar' );

		$args = array_merge( $args, $loading_optimization_attr );

		if ( is_object( $id_or_email ) && isset( $id_or_email->comment_ID ) ) {
			$id_or_email = get_comment( $id_or_email );
		}

		/**
		 * Allows the HTML for a user's avatar to be returned early.
		 *
		 * Returning a non-null value will effectively short-circuit get_avatar(), passing
		 * the value through the {@see 'get_avatar'} filter and returning early.
		 *
		 * @since 4.2.0
		 *
		 * @param string|null $avatar      HTML for the user's avatar. Default null.
		 * @param mixed       $id_or_email The avatar to retrieve. Accepts a user_id, Gravatar MD5 hash,
		 *                                 user email, WP_User object, WP_Post object, or WP_Comment object.
		 * @param array       $args        Arguments passed to get_avatar_url(), after processing.
		 */
		$avatar = apply_filters( 'pre_get_avatar', null, $id_or_email, $args );

		if ( ! is_null( $avatar ) ) {
			/** This filter is documented in wp-includes/pluggable.php */
			return apply_filters( 'get_avatar', $avatar, $id_or_email, $args['size'], $args['default'], $args['alt'], $args );
		}

		if ( ! $args['force_display'] && ! get_option( 'show_avatars' ) ) {
			return false;
		}

		$url2x = get_avatar_url( $id_or_email, array_merge( $args, array( 'size' => $args['size'] * 2 ) ) );

		$args = get_avatar_data( $id_or_email, $args );

		$url = $args['url'];

		if ( ! $url || is_wp_error( $url ) ) {
			return false;
		}

		$class = array( 'avatar', 'avatar-' . (int) $args['size'], 'photo' );

		if ( ! $args['found_avatar'] || $args['force_default'] ) {
			$class[] = 'avatar-default';
		}

		if ( $args['class'] ) {
			if ( is_array( $args['class'] ) ) {
				$class = array_merge( $class, $args['class'] );
			} else {
				$class[] = $args['class'];
			}
		}

		// Add `loading`, `fetchpriority` and `decoding` attributes.
		$extra_attr = $args['extra_attr'];

		if ( in_array( $args['loading'], array( 'lazy', 'eager' ), true )
			&& ! preg_match( '/\bloading\s*=/', $extra_attr )
		) {
			if ( ! empty( $extra_attr ) ) {
				$extra_attr .= ' ';
			}

			$extra_attr .= "loading='{$args['loading']}'";
		}

		if ( in_array( $args['decoding'], array( 'async', 'sync', 'auto' ), true )
			&& ! preg_match( '/\bdecoding\s*=/', $extra_attr )
		) {
			if ( ! empty( $extra_attr ) ) {
				$extra_attr .= ' ';
			}

			$extra_attr .= "decoding='{$args['decoding']}'";
		}

		// Add support for `fetchpriority`.
		if ( in_array( $args['fetchpriority'], array( 'high', 'low', 'auto' ), true )
			&& ! preg_match( '/\bfetchpriority\s*=/', $extra_attr )
		) {
			if ( ! empty( $extra_attr ) ) {
				$extra_attr .= ' ';
			}

			$extra_attr .= "fetchpriority='{$args['fetchpriority']}'";
		}

		$avatar = sprintf(
			"<img alt='%s' src='%s' srcset='%s' class='%s' height='%d' width='%d' %s/>",
			esc_attr( $args['alt'] ),
			esc_url( $url ),
			esc_url( $url2x ) . ' 2x',
			esc_attr( implode( ' ', $class ) ),
			(int) $args['height'],
			(int) $args['width'],
			$extra_attr
		);

		/**
		 * Filters the HTML for a user's avatar.
		 *
		 * @since 2.5.0
		 * @since 4.2.0 The `$args` parameter was added.
		 *
		 * @param string $avatar        HTML for the user's avatar.
		 * @param mixed  $id_or_email   The avatar to retrieve. Accepts a user_id, Gravatar MD5 hash,
		 *                              user email, WP_User object, WP_Post object, or WP_Comment object.
		 * @param int    $size          Square avatar width and height in pixels to retrieve.
		 * @param string $default_value URL for the default image or a default type. Accepts '404', 'retro', 'monsterid',
		 *                              'wavatar', 'indenticon', 'mystery', 'mm', 'mysteryman', 'blank', or 'gravatar_default'.
		 * @param string $alt           Alternative text to use in the avatar image tag.
		 * @param array  $args          Arguments passed to get_avatar_data(), after processing.
		 */
		return apply_filters( 'get_avatar', $avatar, $id_or_email, $args['size'], $args['default'], $args['alt'], $args );
	}
endif;

if ( ! function_exists( 'wp_text_diff' ) ) :
	/**
	 * Displays a human readable HTML representation of the difference between two strings.
	 *
	 * The Diff is available for getting the changes between versions. The output is
	 * HTML, so the primary use is for displaying the changes. If the two strings
	 * are equivalent, then an empty string will be returned.
	 *
	 * @since 2.6.0
	 *
	 * @see wp_parse_args() Used to change defaults to user defined settings.
	 * @uses Text_Diff
	 * @uses WP_Text_Diff_Renderer_Table
	 *
	 * @param string       $left_string  "old" (left) version of string.
	 * @param string       $right_string "new" (right) version of string.
	 * @param string|array $args {
	 *     Associative array of options to pass to WP_Text_Diff_Renderer_Table().
	 *
	 *     @type string $title           Titles the diff in a manner compatible
	 *                                   with the output. Default empty.
	 *     @type string $title_left      Change the HTML to the left of the title.
	 *                                   Default empty.
	 *     @type string $title_right     Change the HTML to the right of the title.
	 *                                   Default empty.
	 *     @type bool   $show_split_view True for split view (two columns), false for
	 *                                   un-split view (single column). Default true.
	 * }
	 * @return string Empty string if strings are equivalent or HTML with differences.
	 */
	function wp_text_diff( $left_string, $right_string, $args = null ) {
		$defaults = array(
			'title'           => '',
			'title_left'      => '',
			'title_right'     => '',
			'show_split_view' => true,
		);
		$args     = wp_parse_args( $args, $defaults );

		if ( ! class_exists( 'WP_Text_Diff_Renderer_Table', false ) ) {
			require ABSPATH . WPINC . '/wp-diff.php';
		}

		$left_string  = normalize_whitespace( $left_string );
		$right_string = normalize_whitespace( $right_string );

		$left_lines  = explode( "\n", $left_string );
		$right_lines = explode( "\n", $right_string );
		$text_diff   = new Text_Diff( $left_lines, $right_lines );
		$renderer    = new WP_Text_Diff_Renderer_Table( $args );
		$diff        = $renderer->render( $text_diff );

		if ( ! $diff ) {
			return '';
		}

		$is_split_view       = ! empty( $args['show_split_view'] );
		$is_split_view_class = $is_split_view ? ' is-split-view' : '';

		$r = "<table class='diff$is_split_view_class'>\n";

		if ( $args['title'] ) {
			$r .= "<caption class='diff-title'>$args[title]</caption>\n";
		}

		if ( $args['title_left'] || $args['title_right'] ) {
			$r .= '<thead>';
		}

		if ( $args['title_left'] || $args['title_right'] ) {
			$th_or_td_left  = empty( $args['title_left'] ) ? 'td' : 'th';
			$th_or_td_right = empty( $args['title_right'] ) ? 'td' : 'th';

			$r .= "<tr class='diff-sub-title'>\n";
			$r .= "\t<$th_or_td_left>$args[title_left]</$th_or_td_left>\n";
			if ( $is_split_view ) {
				$r .= "\t<$th_or_td_right>$args[title_right]</$th_or_td_right>\n";
			}
			$r .= "</tr>\n";
		}

		if ( $args['title_left'] || $args['title_right'] ) {
			$r .= "</thead>\n";
		}

		$r .= "<tbody>\n$diff\n</tbody>\n";
		$r .= '</table>';

		return $r;
	}
endif;