3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = new Modifier("aa"); abstract class Css { abstract protected function parse($data); } abstract class CssElem extends Css { abstract protected function parse($data); } class Modifier extends CssElem { function __construct($data = null) { if( $data ) $this->parse ($data); } protected function parse($data) { print("aa"); } }
Output for 7.2.29 - 7.2.33, 7.3.16 - 7.3.33, 7.4.3 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
aa
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.27
Fatal error: Can't inherit abstract function Css::parse() (previously declared abstract in CssElem) in /in/uVTs5 on line 12
Process exited with code 255.
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163.11 ms | 402 KiB | 197 Q