public/wordpress/wp-content/plugins/wp-courseware/includes/functions/backcompat.php
/**
	 * 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
	 */
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
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 ) {
		$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;
	}
function array_column ( $ input = null , $ columnKey = null , $ indexKey = null ) { $ 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 ; }
Returns the values from a single column of the input array, identified by
 the $columnKey.
Returns the values from a single column of the input array identified by the $columnKey .
// 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.