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run code in 150+ php & hhvm versions
Bugs & Features
<?php namespace Foo; class PDO extends \PDO { public function getDriverName() { return parent::getAttribute(\PDO::ATTR_DRIVER_NAME); } } $pdo = new PDO;
Output for 7.1.0
Fatal error: Uncaught ArgumentCountError: PDO::__construct() expects at least 1 parameter, 0 given in /in/cnFEC:12 Stack trace: #0 /in/cnFEC(12): PDO->__construct() #1 {main} thrown in /in/cnFEC on line 12
Process exited with code 255.
Output for 7.0.0 - 7.0.14
Fatal error: Uncaught TypeError: PDO::__construct() expects at least 1 parameter, 0 given in /in/cnFEC:12 Stack trace: #0 /in/cnFEC(12): PDO->__construct() #1 {main} thrown in /in/cnFEC on line 12
Process exited with code 255.
Output for hhvm-3.12.0
Fatal error: Uncaught exception 'Exception' with message 'PDO::__construct() expects at least 1 parameter, 0 given' in /in/cnFEC:12 Stack trace: #0 /in/cnFEC(12): PDO->__construct() #1 {main}
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.3.0 - 5.6.28
Warning: PDO::__construct() expects at least 1 parameter, 0 given in /in/cnFEC on line 12
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_STRING in /in/cnFEC on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/cnFEC on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/cnFEC on line 2
Process exited with code 255.