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run code in 300+ PHP versions simultaneously
<?phpclass Foo{ private $var; public function buggy() { $bar = new Bar; $bar->prop = & $this->var; $bar->run(); var_dump($this->var); }}class Bar{ public $prop = 'init'; public function run() { $this->prop .= 'xxx'; }}(new Foo)->buggy();
Output for 5.4.0 - 5.4.32, 7.2.29 - 7.2.33, 7.3.16 - 7.3.31, 7.4.3 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
<?phpclass Foo{ private $var; public function buggy() { $bar = new Bar; $bar->prop = & $this->var; $bar->run(); var_dump($this->var); }}class Bar{ public $prop = 'init'; public function run() { $this->prop .= 'xxx'; }}(new Foo)->buggy();
Output for 8.0.13
Parse error: syntax error, unexpected identifier "Foo" in /in/SmdqU on line 1
Process exited with code 255.
Output for 7.3.32 - 7.3.33, 7.4.33
Parse error: syntax error, unexpected 'Foo' (T_STRING) in /in/SmdqU on line 1
Process exited with code 255.

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