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