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run code in 150+ php & hhvm versions
Bugs & Features
<?php class HelloWorld implements Serializable { public $test; public function __construct($str) { $this->test = $str; } public function serialize() { $simple = null; $simple = new Simple(); $simple->test = $this->test; return serialize($simple); } public function unserialize($str) { $simple = unserialize($str); $this->test = $simple->test; } } class Simple { public $test; } $list = array( new HelloWorld('str1'), new HelloWorld('str2'), new HelloWorld('str3'), new HelloWorld('str4'), new HelloWorld('str5'), new HelloWorld('str6'), new HelloWorld('str7'), new HelloWorld('str8'), new HelloWorld('str9'), ); $str = serialize($list); ?>
Output for 5.1.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.0.5
Fatal error: Interface 'Serializable' not found in /in/e76Lh on line 2
Process exited with code 255.
Output for 5.0.0 - 5.0.4
Fatal error: Class 'Serializable' not found in /in/e76Lh 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/e76Lh on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting '{' in /in/e76Lh on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/e76Lh on line 2
Process exited with code 255.