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<?php

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// SPL can be disabled on PHP 5.2

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if ( ! function_exists( 'spl_autoload_register' ) ) {

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$_wp_spl_autoloaders = [];

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/**

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* Registers a function to be autoloaded.

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* @since 4.6.0

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* @param callable $autoload_function The function to register.

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* @param bool $throw Optional. Whether the function should throw an exception

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* if the function isn't callable. Default true.

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* @param bool $prepend Whether the function should be prepended to the stack.

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* Default false.

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* @throws Exception

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function spl_autoload_register( $autoload_function, $throw = true, $prepend = false ) {

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if ( $throw && ! is_callable( $autoload_function ) ) {

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// String not translated to match PHP core.

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throw new Exception( 'Function not callable' );

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}

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global $_wp_spl_autoloaders;

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// Don't allow multiple registration.

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if ( in_array( $autoload_function, $_wp_spl_autoloaders ) ) {

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return;

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}

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if ( $prepend ) {

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array_unshift( $_wp_spl_autoloaders, $autoload_function );

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} else {

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$_wp_spl_autoloaders[] = $autoload_function;

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}

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}

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/**

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* Unregisters an autoloader function.

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* @since 4.6.0

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* @param callable $function The function to unregister.

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* @return bool True if the function was unregistered, false if it could not be.

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function spl_autoload_unregister( $function ) {

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global $_wp_spl_autoloaders;

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foreach ( $_wp_spl_autoloaders as &$autoloader ) {

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if ( $autoloader === $function ) {

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unset( $autoloader );

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return true;

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}

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}

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return false;

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}

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/**

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* Retrieves the registered autoloader functions.

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* @since 4.6.0

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* @return array List of autoloader functions.

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function spl_autoload_functions() {

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return $GLOBALS['_wp_spl_autoloaders'];

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}

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}

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if ( ! function_exists( 'current_action' ) ) {

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function current_action() {

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return current_filter();

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}

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}

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if ( ! function_exists( 'get_called_class' ) ) {

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function get_called_class( $bt = false, $l = 1 ) {

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if ( ! $bt ) {

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$bt = debug_backtrace();

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}

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if ( ! isset( $bt[ $l ] ) ) {

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throw new Exception( 'Cannot find called class -> stack level too deep.' );

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}

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if ( ! isset( $bt[ $l ]['type'] ) ) {

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throw new Exception( 'type not set' );

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} else {

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switch ( $bt[ $l ]['type'] ) {

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case '::':

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$lines = file( $bt[ $l ]['file'] );

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$i = 0;

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$callerLine = '';

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do {

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$i ++;

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$callerLine = $lines[ $bt[ $l ]['line'] - $i ] . $callerLine;

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} while ( stripos( $callerLine, $bt[ $l ]['function'] ) === false );

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preg_match( '/([a-zA-Z0-9\_]+)::' . $bt[ $l ]['function'] . '/', $callerLine, $matches );

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if ( ! isset( $matches[1] ) ) {

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// must be an edge case.

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throw new Exception( 'Could not find caller class: originating method call is obscured.' );

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}

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switch ( $matches[1] ) {

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case 'self':

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case 'parent':

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return get_called_class( $bt, $l + 1 );

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default:

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return $matches[1];

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}

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// won't get here.

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case '->':

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switch ( $bt[ $l ]['function'] ) {

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case '__get':

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// edge case -> get class of calling object

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if ( ! is_object( $bt[ $l ]['object'] ) ) {

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throw new Exception( 'Edge case fail. __get called on non object.' );

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}

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return get_class( $bt[ $l ]['object'] );

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default:

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return get_class( $bt[ $l ]['object'] );

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}

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default:

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throw new Exception( 'Unknown backtrace method type' );

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}

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}

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}

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}

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if ( ! function_exists( 'get_term_name' ) ) {

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function get_term_name( $term_id, $taxonomy ) {

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$term = get_term_by( 'id', absint( $term_id ), $taxonomy );

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return $term->name;

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}

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}

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// For WP versions before 3.6

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if ( ! function_exists( 'has_shortcode' ) ) {

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function has_shortcode( $content, $tag ) {

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if ( false === strpos( $content, '[' ) ) {

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return false;

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}

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if ( shortcode_exists( $tag ) ) {

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preg_match_all( '/' . get_shortcode_regex() . '/s', $content, $matches, PREG_SET_ORDER );

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if ( empty( $matches ) ) {

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return false;

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}

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foreach ( $matches as $shortcode ) {

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if ( $tag === $shortcode[2] ) {

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return true;

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} elseif ( ! empty( $shortcode[5] ) && has_shortcode( $shortcode[5], $tag ) ) {

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return true;

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}

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}

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}

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return false;

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}

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}

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if ( ! function_exists( 'shortcode_exists' ) ) {

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function shortcode_exists( $tag ) {

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global $shortcode_tags;

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return array_key_exists( $tag, $shortcode_tags );

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}

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}

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/**

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* Deprecated PHP v5.3 functions.

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if ( ! function_exists( 'array_replace_recursive' ) ) {

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function array_replace_recursive( $array, $array1 ) {

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// handle the arguments, merge one by one

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$args = func_get_args();

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$array = $args[0];

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if ( ! is_array( $array ) ) {

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return $array;

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}

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for ( $i = 1; $i < count( $args ); $i ++ ) {

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if ( is_array( $args[ $i ] ) ) {

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$array = recurse( $array, $args[ $i ] );

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}

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}

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return $array;

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}

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}

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if ( ! function_exists( 'recurse' ) ) {

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function recurse( $array, $array1 ) {

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foreach ( $array1 as $key => $value ) {

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// create new key in $array, if it is empty or not an array

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if ( ! isset( $array[ $key ] ) || ( isset( $array[ $key ] ) && ! is_array( $array[ $key ] ) ) ) {

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$array[ $key ] = [];

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}

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// overwrite the value in the base array

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if ( is_array( $value ) ) {

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$value = recurse( $array[ $key ], $value );

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}

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$array[ $key ] = $value;

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}

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return $array;

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}

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}

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if ( ! function_exists( 'write_log' ) ) {

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function write_log( $log ) {

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if ( is_array( $log ) || is_object( $log ) ) {

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error_log( print_r( $log, true ) );

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} else {

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error_log( $log );

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}

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}

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}

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if ( ! function_exists( 'boolval' ) ) {

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function boolval( $val ) {

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return (bool) $val;

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}

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}

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if ( ! function_exists( 'maybe_json_attr' ) ) {

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function maybe_json_attr( $value, $encode = false ) {

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if ( is_object( $value ) || is_array( $value ) ) {

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return $encode ? htmlspecialchars( wp_json_encode( $value ) ) : wp_json_encode( $value );

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}

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return $value;

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}

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}

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if ( ! function_exists( 'has_blocks' ) ) {

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/**

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* Determine whether a post or content string has blocks.

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* This test optimizes for performance rather than strict accuracy, detecting

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* the pattern of a block but not validating its structure. For strict accuracy,

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* you should use the block parser on post content.

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* @since 5.0.0

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* @see parse_blocks()

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* @param int|string|WP_Post|null $post Optional. Post content, post ID, or post object. Defaults to global $post.

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* @return bool Whether the post has blocks.

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function has_blocks( $post = null ) {

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if ( ! is_string( $post ) ) {

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$wp_post = get_post( $post );

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if ( $wp_post instanceof WP_Post ) {

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$post = $wp_post->post_content;

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}

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}

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return false !== strpos( (string) $post, '<!-- wp:' );

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}

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}

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/**

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* Aweful hack for backward compatibility with WP <5.3.

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if ( ! function_exists( 'wp_date' ) ) {

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function wp_date( $format, $timestamp = null, $timezone = null ) {

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global $wp_locale;

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if ( null === $timestamp ) {

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$timestamp = time();

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} elseif ( ! is_numeric( $timestamp ) ) {

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return false;

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}

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if ( ! $timezone ) {

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if ( function_exists( 'wp_timezone' ) ) {

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$timezone = wp_timezone();

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} else {

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// Get the server timezone

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$server_timezone = get_option( 'timezone_string' );

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// If timezone_string is not set, get the default timezone of the server

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if ( empty( $server_timezone ) ) {

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$server_timezone = date_default_timezone_get();

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}

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$timezone = new DateTimeZone( $server_timezone );

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}

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}

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$datetime = date_create( '@' . $timestamp );

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$datetime->setTimezone( $timezone );

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if ( empty( $wp_locale->month ) || empty( $wp_locale->weekday ) ) {

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$date = $datetime->format( $format );

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} else {

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// We need to unpack shorthand `r` format because it has parts that might be localized.

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$format = preg_replace( '/(?<!\\\\)r/', DATE_RFC2822, $format );

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$new_format = '';

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$format_length = strlen( $format );

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$month = $wp_locale->get_month( $datetime->format( 'm' ) );

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$weekday = $wp_locale->get_weekday( $datetime->format( 'w' ) );

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for ( $i = 0; $i < $format_length; $i++ ) {

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switch ( $format[ $i ] ) {

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case 'D':

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$new_format .= addcslashes( $wp_locale->get_weekday_abbrev( $weekday ), '\\A..Za..z' );

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break;

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case 'F':

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$new_format .= addcslashes( $month, '\\A..Za..z' );

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break;

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case 'l':

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$new_format .= addcslashes( $weekday, '\\A..Za..z' );

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break;

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case 'M':

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$new_format .= addcslashes( $wp_locale->get_month_abbrev( $month ), '\\A..Za..z' );

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break;

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case 'a':

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$new_format .= addcslashes( $wp_locale->get_meridiem( $datetime->format( 'a' ) ), '\\A..Za..z' );

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break;

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case 'A':

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$new_format .= addcslashes( $wp_locale->get_meridiem( $datetime->format( 'A' ) ), '\\A..Za..z' );

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break;

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case '\\':

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$new_format .= $format[ $i ];

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// If character follows a slash, we add it without translating.

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if ( $i < $format_length ) {

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$new_format .= $format[ ++$i ];

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}

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break;

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default:

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$new_format .= $format[ $i ];

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break;

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}

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}

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$date = $datetime->format( $new_format );

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$date = wp_maybe_decline_date( $date, $format );

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}

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/**

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* Filters the date formatted based on the locale.

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* @since 5.3.0

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* @param string $date Formatted date string.

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* @param string $format Format to display the date.

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* @param int $timestamp Unix timestamp.

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* @param DateTimeZone $timezone Timezone.

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$date = apply_filters( 'wp_date', $date, $format, $timestamp, $timezone );

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return $date;

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}

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}

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