1--TEST-- 2Test array_intersect_uassoc() function : usage variation - Passing non-existing function name to callback 3--FILE-- 4<?php 5/* Prototype : array array_intersect_uassoc(array arr1, array arr2 [, array ...], callback key_compare_func) 6 * Description: Computes the intersection of arrays with additional index check, compares indexes by a callback function 7 * Source code: ext/standard/array.c 8 */ 9 10echo "*** Testing array_intersect_uassoc() : usage variation ***\n"; 11 12//Initialize variables 13$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red"); 14$array2 = array("a" => "green", "yellow", "red"); 15 16//function name within double quotes 17var_dump( array_intersect_uassoc($array1, $array2, "unknown_function") ); 18 19//function name within single quotes 20var_dump( array_intersect_uassoc($array1, $array2, 'unknown_function') ); 21 22//function name without quotes 23var_dump( array_intersect_uassoc($array1, $array2, unknown_function) ); 24?> 25===DONE=== 26--EXPECTF-- 27*** Testing array_intersect_uassoc() : usage variation *** 28 29Warning: array_intersect_uassoc() expects parameter 3 to be a valid callback, function 'unknown_function' not found or invalid function name in %s on line %d 30NULL 31 32Warning: array_intersect_uassoc() expects parameter 3 to be a valid callback, function 'unknown_function' not found or invalid function name in %s on line %d 33NULL 34 35Notice: Use of undefined constant unknown_function - assumed 'unknown_function' in %s on line %d 36 37Warning: array_intersect_uassoc() expects parameter 3 to be a valid callback, function 'unknown_function' not found or invalid function name in %s on line %d 38NULL 39===DONE=== 40