3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { public $a = "$a"; }
Output for 7.0.0 - 7.0.1
Fatal error: Constant expression contains invalid operations in /in/eegY7 on line 5
Process exited with code 255.
Output for 5.5.24 - 5.5.30, 5.6.8 - 5.6.16
Parse error: syntax error, unexpected '"' in /in/eegY7 on line 5
Process exited with code 255.
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176.61 ms | 1395 KiB | 25 Q