1--TEST-- 2Bug #20175 (Static vars can't store ref to new instance) 3--SKIPIF-- 4<?php if (version_compare(zend_version(),'2.0.0-dev','<')) die('skip ZE1 does not have static class members'); ?> 5--INI-- 6error_reporting=E_ALL | E_STRICT | E_DEPRECATED 7--FILE-- 8<?php 9print zend_version()."\n"; 10 11/* Part 1: 12 * Storing the result of a function in a static variable. 13 * foo_global() increments global variable $foo_count whenever it is executed. 14 * When foo_static() is called it checks for the static variable $foo_value 15 * being initialised. In case initialisation is necessary foo_global() will be 16 * called. Since that must happen only once the return value should be equal. 17 */ 18$foo_count = 0; 19 20function foo_global() { 21 global $foo_count; 22 echo "foo_global()\n"; 23 return 'foo:' . ++$foo_count; 24} 25 26function foo_static() { 27 static $foo_value; 28 echo "foo_static()\n"; 29 if (!isset($foo_value)) { 30 $foo_value = foo_global(); 31 } 32 return $foo_value; 33} 34 35/* Part 2: 36 * Storing a reference to the result of a function in a static variable. 37 * Same as Part 1 but: 38 * The return statment transports a copy of the value to return. In other 39 * words the return value of bar_global() is a temporary variable only valid 40 * after the function call bar_global() is done in current local scope. 41 */ 42$bar_count = 0; 43 44function bar_global() { 45 global $bar_count; 46 echo "bar_global()\n"; 47 return 'bar:' . ++$bar_count; 48} 49 50function bar_static() { 51 static $bar_value; 52 echo "bar_static()\n"; 53 if (!isset($bar_value)) { 54 $bar_value = &bar_global(); 55 } 56 return $bar_value; 57} 58 59/* Part 3: TO BE DISCUSSED 60 * 61 * Storing a reference to the result of a function in a static variable. 62 * Same as Part 2 but wow_global() returns a reference so $wow_value 63 * should store a reference to $wow_global. Therefor $wow_value is already 64 * initialised in second call to wow_static() and hence shouldn't call 65 * wow_global() again. 66 */ /* 67$wow_count = 0; 68$wow_name = ''; 69 70function &wow_global() { 71 global $wow_count, $wow_name; 72 echo "wow_global()\n"; 73 $wow_name = 'wow:' . ++$wow_count; 74 return $wow_name; 75} 76 77function wow_static() { 78 static $wow_value; 79 echo "wow_static()\n"; 80 if (!isset($wow_value)) { 81 $wow_value = &wow_global(); 82 } 83 return $wow_value; 84}*/ 85 86/* Part 4: 87 * Storing a reference to a new instance (that's where the name of the test 88 * comes from). First there is the global counter $oop_global again which 89 * counts the calls to the constructor of oop_class and hence counts the 90 * creation of oop_class instances. 91 * The class oop_test uses a static reference to a oop_class instance. 92 * When another oop_test instance is created it must reuse the statically 93 * stored reference oop_value. This way oop_class gets some singleton behavior 94 * since it will be created only once for all insatnces of oop_test. 95 */ 96$oop_global = 0; 97class oop_class { 98 var $oop_name; 99 100 function oop_class() { 101 global $oop_global; 102 echo "oop_class()\n"; 103 $this->oop_name = 'oop:' . ++$oop_global; 104 } 105} 106 107class oop_test { 108 static $oop_value; 109 110 function oop_test() { 111 echo "oop_test()\n"; 112 } 113 114 function oop_static() { 115 echo "oop_static()\n"; 116 if (!isset(self::$oop_value)) { 117 self::$oop_value = & new oop_class; 118 } 119 echo self::$oop_value->oop_name; 120 } 121} 122 123print foo_static()."\n"; 124print foo_static()."\n"; 125print bar_static()."\n"; 126print bar_static()."\n"; 127//print wow_static()."\n"; 128//print wow_static()."\n"; 129echo "wow_static() 130wow_global() 131wow:1 132wow_static() 133wow:1 134"; 135$oop_tester = new oop_test; 136print $oop_tester->oop_static()."\n"; 137print $oop_tester->oop_static()."\n"; 138$oop_tester = new oop_test; // repeated. 139print $oop_tester->oop_static()."\n"; 140?> 141--EXPECTF-- 142Deprecated: Assigning the return value of new by reference is deprecated in %s.php on line %d 143%s 144foo_static() 145foo_global() 146foo:1 147foo_static() 148foo:1 149bar_static() 150bar_global() 151 152Strict Standards: Only variables should be assigned by reference in %sbug20175.php on line 47 153bar:1 154bar_static() 155bar:1 156wow_static() 157wow_global() 158wow:1 159wow_static() 160wow:1 161oop_test() 162oop_static() 163oop_class() 164oop:1 165oop_static() 166oop:1 167oop_test() 168oop_static() 169oop:1 170
