1--TEST-- 2Test array_key_exists() function : object functionality - different visibilities 3--FILE-- 4<?php 5/* Prototype : bool array_key_exists(mixed $key, array $search) 6 * Description: Checks if the given key or index exists in the array 7 * Source code: ext/standard/array.c 8 * Alias to functions: key_exists 9 */ 10 11/* 12 * Pass array_key_exists() an object with private and protected properties 13 */ 14 15echo "*** Testing array_key_exists() : object functionality ***\n"; 16 17class myClass { 18 public $var1; 19 protected $var2; 20 private $var3; 21 22 function __construct($a, $b, $c = null) { 23 $this->var1 = $a; 24 $this->var2 = $b; 25 if (!is_null($c)) { 26 $this->var3 = $c; 27 } 28 } 29} 30 31echo "\n-- Do not assign a value to \$class1->var3 --\n"; 32$class1 = new myClass ('a', 'b'); 33echo "\$key = var1:\n"; 34var_dump(array_key_exists('var1', $class1)); 35echo "\$key = var2:\n"; 36var_dump(array_key_exists('var2', $class1)); 37echo "\$key = var3:\n"; 38var_dump(array_key_exists('var3', $class1)); 39echo "\$class1:\n"; 40var_dump($class1); 41 42echo "\n-- Assign a value to \$class2->var3 --\n"; 43$class2 = new myClass('x', 'y', 'z'); 44echo "\$key = var3:\n"; 45var_dump(array_key_exists('var3', $class2)); 46echo "\$class2:\n"; 47var_dump($class2); 48 49echo "Done"; 50?> 51 52--EXPECTF-- 53*** Testing array_key_exists() : object functionality *** 54 55-- Do not assign a value to $class1->var3 -- 56$key = var1: 57bool(true) 58$key = var2: 59bool(false) 60$key = var3: 61bool(false) 62$class1: 63object(myClass)#1 (3) { 64 [%b|u%"var1"]=> 65 %unicode|string%(1) "a" 66 [%b|u%"var2":protected]=> 67 %unicode|string%(1) "b" 68 [%b|u%"var3":%b|u%"myClass":private]=> 69 NULL 70} 71 72-- Assign a value to $class2->var3 -- 73$key = var3: 74bool(false) 75$class2: 76object(myClass)#2 (3) { 77 [%b|u%"var1"]=> 78 %unicode|string%(1) "x" 79 [%b|u%"var2":protected]=> 80 %unicode|string%(1) "y" 81 [%b|u%"var3":%b|u%"myClass":private]=> 82 %unicode|string%(1) "z" 83} 84Done 85