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--EXPECTF-- 52*** Testing array_key_exists() : object functionality *** 53 54-- Do not assign a value to $class1->var3 -- 55$key = var1: 56bool(true) 57$key = var2: 58bool(false) 59$key = var3: 60bool(false) 61$class1: 62object(myClass)#1 (3) { 63 ["var1"]=> 64 string(1) "a" 65 ["var2":protected]=> 66 string(1) "b" 67 ["var3":"myClass":private]=> 68 NULL 69} 70 71-- Assign a value to $class2->var3 -- 72$key = var3: 73bool(false) 74$class2: 75object(myClass)#2 (3) { 76 ["var1"]=> 77 string(1) "x" 78 ["var2":protected]=> 79 string(1) "y" 80 ["var3":"myClass":private]=> 81 string(1) "z" 82} 83Done 84