3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo isset(strpos('xyz','a'));
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.23
Fatal error: Can't use function return value in write context in /in/vENkT on line 3
Process exited with code 255.
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177.48 ms | 940 KiB | 61 Q