3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { public $bar; public function foo() { static $foo = NULL; if ($foo === NULL) { $foo = $this->bar; } return $foo; } } $f1 = new Foo(); $f1->bar = '1'; echo $f1->foo(); $f2 = new Foo(); $f2->bar = '2'; echo $f2->foo();
Output for 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.3.32 - 7.3.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
11
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Foo has a deprecated constructor in /in/8hug6 on line 3 11
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