3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Widget implements Serializable { public $references = array(); public function serialize() { $vars = get_object_vars($this); $serialized = serialize($vars); return $serialized; } public function unserialize($serialized) { $array = unserialize($serialized); foreach($array as $k => $v) $this->$k = $v; } } class Placeholder { public $id; public function __construct($id) { $this->id = $id; } } $placeholder1 = new Placeholder(1); $placeholder2 = new Placeholder(2); $widgets = array(new Widget, new Widget, new Widget, new Widget); $widgets[0]->references[] = $placeholder1; $widgets[1]->references[] = $placeholder2; $widgets[2]->references[] = $placeholder1; $widgets[3]->references[] = $placeholder1; echo serialize($widgets);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Widget implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in /in/rBHTh on line 2 a:4:{i:0;C:6:"Widget":70:{a:1:{s:10:"references";a:1:{i:0;O:11:"Placeholder":1:{s:2:"id";i:1;}}}}i:1;C:6:"Widget":70:{a:1:{s:10:"references";a:1:{i:0;O:11:"Placeholder":1:{s:2:"id";i:2;}}}}i:2;C:6:"Widget":38:{a:1:{s:10:"references";a:1:{i:0;r:5;}}}i:3;C:6:"Widget":38:{a:1:{s:10:"references";a:1:{i:0;r:5;}}}}
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
a:4:{i:0;C:6:"Widget":70:{a:1:{s:10:"references";a:1:{i:0;O:11:"Placeholder":1:{s:2:"id";i:1;}}}}i:1;C:6:"Widget":70:{a:1:{s:10:"references";a:1:{i:0;O:11:"Placeholder":1:{s:2:"id";i:2;}}}}i:2;C:6:"Widget":38:{a:1:{s:10:"references";a:1:{i:0;r:5;}}}i:3;C:6:"Widget":38:{a:1:{s:10:"references";a:1:{i:0;r:5;}}}}
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
a:4:{i:0;C:6:"Widget":70:{a:1:{s:10:"references";a:1:{i:0;O:11:"Placeholder":1:{s:2:"id";i:1;}}}}i:1;C:6:"Widget":70:{a:1:{s:10:"references";a:1:{i:0;O:11:"Placeholder":1:{s:2:"id";i:2;}}}}i:2;C:6:"Widget":70:{a:1:{s:10:"references";a:1:{i:0;O:11:"Placeholder":1:{s:2:"id";i:1;}}}}i:3;C:6:"Widget":70:{a:1:{s:10:"references";a:1:{i:0;O:11:"Placeholder":1:{s:2:"id";i:1;}}}}}
Output for 5.0.5
Fatal error: Interface 'Serializable' not found in /in/rBHTh on line 2
Process exited with code 255.
Output for 5.0.0 - 5.0.4
Fatal error: Class 'Serializable' not found in /in/rBHTh on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/rBHTh on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting '{' in /in/rBHTh on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/rBHTh on line 2
Process exited with code 255.
preferences:
224.42 ms | 401 KiB | 363 Q