3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class O_B {} class O_A extends O_B { function __construct() { echo __CLASS__; } } function ff($classname) { echo $classname; } class_alias('O_A', 'A'); spl_autoload_register ('ff'); new A();
Output for 5.3.0 - 5.6.21, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
O_A
Output for 5.0.0 - 5.2.17
Fatal error: Call to undefined function class_alias() in /in/DFHFb on line 17
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: class_alias() in /in/DFHFb on line 17
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: class_alias() in /in/DFHFb on line 17
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: class_alias() in /in/DFHFb on line 17