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✏️ Editing: missing-php-functions.php

<?php

if(!function_exists('_cleanup_header_comment')){
    function _cleanup_header_comment($str) {
        return trim(preg_replace("/\s*(?:\*\/|\?>).*/", '', $str));
    } 
}

if(!defined('E_DEPRECATED')){ define('E_DEPRECATED', 8192); }

if(!function_exists('esc_textarea')):
    
    function esc_textarea( $text ) {
        $safe_text = esc_html( $text );
        return apply_filters( 'esc_textarea', $safe_text, $text );
    }    
    
endif;

if ( ! function_exists( 'wp_doing_ajax' ) ) {
	/**
	 * Determines whether the current request is a WordPress Ajax request.
	 *
	 * @since 4.7.0
	 *
	 * @return bool True if it's a WordPress Ajax request, false otherwise.
	 */
	function wp_doing_ajax() {
		/**
		 * Filters whether the current request is a WordPress Ajax request.
		 *
		 * @since 4.7.0
		 *
		 * @param bool $wp_doing_ajax Whether the current request is a WordPress Ajax request.
		 */
		return apply_filters( 'wp_doing_ajax', defined( 'DOING_AJAX' ) && DOING_AJAX );
	}
}

if ( ! function_exists( 'wpml_is_ajax' ) ) {
	/**
	 * wpml_is_ajax - Returns true when the page is loaded via ajax.
	 *
	 * @since  3.1.5
	 *         
	 * @return bool
	 */
	function wpml_is_ajax() {
		if ( defined( 'DOING_AJAX' ) ) {
			return true;
		}

return ( isset( $_SERVER[ 'HTTP_X_REQUESTED_WITH' ] ) && wpml_mb_strtolower( $_SERVER[ 'HTTP_X_REQUESTED_WITH' ] ) == 'xmlhttprequest' ) ? true : false;
	}
}

if ( ! function_exists( 'is_ajax' ) ) {
	/**
	 * is_ajax - Returns true when the page is loaded via ajax.
	 *
	 * @deprecated Deprecated since 3.1.5
	 *
	 * @return bool
	 */
	function is_ajax() {

// Deprecation notice will be added in a next release
//		_deprecated_function( "WPML " . __FUNCTION__, "3.1.5", "wpml_is_ajax" );

if ( defined( 'DOING_AJAX' ) ) {
			return true;
		}

return ( isset( $_SERVER[ 'HTTP_X_REQUESTED_WITH' ] ) && wpml_mb_strtolower( $_SERVER[ 'HTTP_X_REQUESTED_WITH' ] ) == 'xmlhttprequest' ) ? true : false;
	}
}

/**
 * This file is part of the array_column library
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @copyright Copyright (c) 2013 Ben Ramsey <http://benramsey.com>
 * @license http://opensource.org/licenses/MIT MIT
 */

if (!function_exists('array_column')) {

/**
     * Returns the values from a single column of the input array, identified by
     * the $columnKey.
     *
     * Optionally, you may provide an $indexKey to index the values in the returned
     * array by the values from the $indexKey column in the input array.
     *
     * @param array $input A multi-dimensional array (record set) from which to pull
     *                     a column of values.
     * @param mixed $columnKey The column of values to return. This value may be the
     *                         integer key of the column you wish to retrieve, or it
     *                         may be the string key name for an associative array.
     * @param mixed $indexKey (Optional.) The column to use as the index/keys for
     *                        the returned array. This value may be the integer key
     *                        of the column, or it may be the string key name.
     * @return array
     */
    function array_column($input = null, $columnKey = null, $indexKey = null)
    {
        // Using func_get_args() in order to check for proper number of
        // parameters and trigger errors exactly as the built-in array_column()
        // does in PHP 5.5.
        $argc = func_num_args();
        $params = func_get_args();

if ($argc < 2) {
            trigger_error("array_column() expects at least 2 parameters, {$argc} given", E_USER_WARNING);
            return null;
        }

if (!is_array($params[0])) {
            trigger_error('array_column() expects parameter 1 to be array, ' . gettype($params[0]) . ' given', E_USER_WARNING);
            return null;
        }

if (!is_int($params[1])
            && !is_float($params[1])
            && !is_string($params[1])
            && $params[1] !== null
            && !(is_object($params[1]) && method_exists($params[1], '__toString'))
        ) {
            trigger_error('array_column(): The column key should be either a string or an integer', E_USER_WARNING);
            return false;
        }

if (isset($params[2])
            && !is_int($params[2])
            && !is_float($params[2])
            && !is_string($params[2])
            && !(is_object($params[2]) && method_exists($params[2], '__toString'))
        ) {
            trigger_error('array_column(): The index key should be either a string or an integer', E_USER_WARNING);
            return false;
        }

$paramsInput = $params[0];
        $paramsColumnKey = ($params[1] !== null) ? (string) $params[1] : null;

$paramsIndexKey = null;
        if (isset($params[2])) {
            if (is_float($params[2]) || is_int($params[2])) {
                $paramsIndexKey = (int) $params[2];
            } else {
                $paramsIndexKey = (string) $params[2];
            }
        }

$resultArray = array();

foreach ($paramsInput as $row) {

$key = $value = null;
            $keySet = $valueSet = false;

if ($paramsIndexKey !== null && array_key_exists($paramsIndexKey, $row)) {
                $keySet = true;
                $key = (string) $row[$paramsIndexKey];
            }

if ($paramsColumnKey === null) {
                $valueSet = true;
                $value = $row;
            } elseif (is_array($row) && array_key_exists($paramsColumnKey, $row)) {
                $valueSet = true;
                $value = $row[$paramsColumnKey];
            }

if ($valueSet) {
                if ($keySet) {
                    $resultArray[$key] = $value;
                } else {
                    $resultArray[] = $value;
                }
            }

}

return $resultArray;
    }

}

if ( ! function_exists( 'wp_json_encode' ) ) {
	function wp_json_encode( $data, $options = 0, $depth = 512 ) {
		/*
		 * json_encode() has had extra params added over the years.
		 * $options was added in 5.3, and $depth in 5.5.
		 * We need to make sure we call it with the correct arguments.
		 */
		if ( version_compare( PHP_VERSION, '5.5', '>=' ) ) {
			$args = array( $data, $options, $depth );
		} elseif ( version_compare( PHP_VERSION, '5.3', '>=' ) ) {
			$args = array( $data, $options );
		} else {
			$args = array( $data );
		}

$json = call_user_func_array( 'json_encode', $args );

// If json_encode() was successful, no need to do more sanity checking.
		// ... unless we're in an old version of PHP, and json_encode() returned
		// a string containing 'null'. Then we need to do more sanity checking.
		if ( false !== $json && ( version_compare( PHP_VERSION, '5.5', '>=' ) || false === strpos( $json, 'null' ) ) )  {
			return $json;
		}

try {
			$args[0] = _wp_json_sanity_check( $data, $depth );
		} catch ( Exception $e ) {
			return false;
		}

return call_user_func_array( 'json_encode', $args );
	}

if ( ! function_exists( '_wp_json_sanity_check' ) ) {
		function _wp_json_sanity_check( $data, $depth ) {
			if ( $depth < 0 ) {
				throw new Exception( 'Reached depth limit' );
			}

if ( is_array( $data ) ) {
				$output = array();
				foreach ( $data as $id => $el ) {
					// Don't forget to sanitize the ID!
					if ( is_string( $id ) ) {
						$clean_id = _wp_json_convert_string( $id );
					} else {
						$clean_id = $id;
					}

// Check the element type, so that we're only recursing if we really have to.
					if ( is_array( $el ) || is_object( $el ) ) {
						$output[ $clean_id ] = _wp_json_sanity_check( $el, $depth - 1 );
					} elseif ( is_string( $el ) ) {
						$output[ $clean_id ] = _wp_json_convert_string( $el );
					} else {
						$output[ $clean_id ] = $el;
					}
				}
			} elseif ( is_object( $data ) ) {
				$output = new stdClass;
				foreach ( $data as $id => $el ) {
					if ( is_string( $id ) ) {
						$clean_id = _wp_json_convert_string( $id );
					} else {
						$clean_id = $id;
					}

if ( is_array( $el ) || is_object( $el ) ) {
						$output->$clean_id = _wp_json_sanity_check( $el, $depth - 1 );
					} elseif ( is_string( $el ) ) {
						$output->$clean_id = _wp_json_convert_string( $el );
					} else {
						$output->$clean_id = $el;
					}
				}
			} elseif ( is_string( $data ) ) {
				return _wp_json_convert_string( $data );
			} else {
				return $data;
			}

return $output;
		}
	}

if(!function_exists('_wp_json_convert_string')) {
		function _wp_json_convert_string( $string ) {
			static $use_mb = null;
			if ( is_null( $use_mb ) ) {
				$use_mb = function_exists( 'mb_convert_encoding' );
			}

if ( $use_mb ) {
				$encoding = mb_detect_encoding( $string, mb_detect_order(), true );
				if ( $encoding ) {
					return mb_convert_encoding( $string, 'UTF-8', $encoding );
				} else {
					return mb_convert_encoding( $string, 'UTF-8', 'UTF-8' );
				}
			} else {
				return wp_check_invalid_utf8( $string, true );
			}
		}
	}
}

if ( ! function_exists( 'array_replace_recursive' ) ) {
	function array_replace_recursive( $array, $array1 ) {
		// handle the arguments, merge one by one
		$args  = func_get_args();
		$array = $args[ 0 ];
		if ( ! is_array( $array ) ) {
			return $array;
		}
		$args_count = count( $args );
		for ( $i = 1; $i < $args_count; $i ++ ) {
			if ( is_array( $args[ $i ] ) ) {
				$array = array_replace_recursive_recurse( $array, $args[ $i ] );
			}
		}

return $array;
	}

function array_replace_recursive_recurse( $array, $array1 ) {
		foreach ( $array1 as $key => $value ) {
			// create new key in $array, if it is empty or not an array
			if ( ! isset( $array[ $key ] ) || ( isset( $array[ $key ] ) && ! is_array( $array[ $key ] ) ) ) {
				$array[ $key ] = array();
			}

// overwrite the value in the base array
			if ( is_array( $value ) ) {
				$value = array_replace_recursive_recurse( $array[ $key ], $value );
			}
			$array[ $key ] = $value;
		}

return $array;
	}
}

MR SKB