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run code in 300+ PHP versions simultaneously
<?php abstract class Parent { abstract public function bla($arg1, $arg2 = null); } class Child extends Parent { public function bla($arg1, $arg2 = null) { } }
Output for 5.3.0 - 5.3.26, 5.4.0 - 5.4.16
Fatal error: Cannot use 'Parent' as class name as it is reserved in /in/pqUlP on line 4
Process exited with code 255.

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