1--TEST-- 2Test usort() function : usage variations - Pass different data types as $cmp_function arg 3--FILE-- 4<?php 5/* Prototype : bool usort(array $array_arg, string $cmp_function) 6 * Description: Sort an array by values using a user-defined comparison function 7 * Source code: ext/standard/array.c 8 */ 9 10/* 11 * Pass different data types as $cmp_function argument to usort() to test behaviour 12 */ 13 14echo "*** Testing usort() : usage variation ***\n"; 15 16// Class definition for object variable 17class MyClass 18{ 19 public function __toString() 20 { 21 return 'object'; 22 } 23} 24 25$array_arg = array(0 => 1, 1 => -1, 2 => 3, 3 => 10, 4 => 4, 5 => 2, 6 => 8, 7 => 5); 26 27// Get an unset variable 28$unset_var = 10; 29unset ($unset_var); 30 31// Get resource variable 32$fp = fopen(__FILE__,'r'); 33 34// different values for $cmp_function 35$inputs = array( 36 37 // int data 38/*1*/ 0, 39 1, 40 12345, 41 -2345, 42 43 // float data 44/*5*/ 10.5, 45 -10.5, 46 10.1234567e8, 47 10.7654321E-8, 48 .5, 49 50 // array data 51/*10*/ array(), 52 array(0), 53 array(1), 54 array(1, 2), 55 array('color' => 'red', 'item' => 'pen'), 56 57 // null data 58/*15*/ NULL, 59 null, 60 61 // boolean data 62/*17*/ true, 63 false, 64 TRUE, 65 FALSE, 66 67 // empty data 68/*21*/ "", 69 '', 70 71 // string data 72 "string", 73 'string', 74 75 // object data 76/*25*/ new MyClass(), 77 78 // resource data 79 $fp, 80 81 // undefined data 82 @$undefined_var, 83 84 // unset data 85/*28*/ @$unset_var, 86); 87 88// loop through each element of $inputs to check the behavior of usort() 89$iterator = 1; 90foreach($inputs as $input) { 91 echo "\n-- Iteration $iterator --\n"; 92 var_dump( usort($array_arg, $input) ); 93 $iterator++; 94}; 95 96//closing resource 97fclose($fp); 98?> 99===DONE=== 100--EXPECTF-- 101*** Testing usort() : usage variation *** 102 103-- Iteration 1 -- 104 105Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 106NULL 107 108-- Iteration 2 -- 109 110Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 111NULL 112 113-- Iteration 3 -- 114 115Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 116NULL 117 118-- Iteration 4 -- 119 120Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 121NULL 122 123-- Iteration 5 -- 124 125Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 126NULL 127 128-- Iteration 6 -- 129 130Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 131NULL 132 133-- Iteration 7 -- 134 135Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 136NULL 137 138-- Iteration 8 -- 139 140Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 141NULL 142 143-- Iteration 9 -- 144 145Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 146NULL 147 148-- Iteration 10 -- 149 150Warning: usort() expects parameter 2 to be a valid callback, array must have exactly two members in %s on line %d 151NULL 152 153-- Iteration 11 -- 154 155Warning: usort() expects parameter 2 to be a valid callback, array must have exactly two members in %s on line %d 156NULL 157 158-- Iteration 12 -- 159 160Warning: usort() expects parameter 2 to be a valid callback, array must have exactly two members in %s on line %d 161NULL 162 163-- Iteration 13 -- 164 165Warning: usort() expects parameter 2 to be a valid callback, first array member is not a valid class name or object in %s on line %d 166NULL 167 168-- Iteration 14 -- 169 170Warning: usort() expects parameter 2 to be a valid callback, first array member is not a valid class name or object in %s on line %d 171NULL 172 173-- Iteration 15 -- 174 175Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 176NULL 177 178-- Iteration 16 -- 179 180Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 181NULL 182 183-- Iteration 17 -- 184 185Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 186NULL 187 188-- Iteration 18 -- 189 190Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 191NULL 192 193-- Iteration 19 -- 194 195Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 196NULL 197 198-- Iteration 20 -- 199 200Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 201NULL 202 203-- Iteration 21 -- 204 205Warning: usort() expects parameter 2 to be a valid callback, function '' not found or invalid function name in %s on line %d 206NULL 207 208-- Iteration 22 -- 209 210Warning: usort() expects parameter 2 to be a valid callback, function '' not found or invalid function name in %s on line %d 211NULL 212 213-- Iteration 23 -- 214 215Warning: usort() expects parameter 2 to be a valid callback, function 'string' not found or invalid function name in %s on line %d 216NULL 217 218-- Iteration 24 -- 219 220Warning: usort() expects parameter 2 to be a valid callback, function 'string' not found or invalid function name in %s on line %d 221NULL 222 223-- Iteration 25 -- 224 225Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 226NULL 227 228-- Iteration 26 -- 229 230Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 231NULL 232 233-- Iteration 27 -- 234 235Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 236NULL 237 238-- Iteration 28 -- 239 240Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d 241NULL 242===DONE=== 243