3v4l.org

run code in 300+ PHP versions simultaneously
<?php $dates = array('a','b'); echo (count($dates)++);
Output for 5.3.0 - 5.3.21, 5.4.0 - 5.4.11
Fatal error: Can't use function return value in write context in /in/3JV2V on line 5
Process exited with code 255.
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164.54 ms | 1395 KiB | 41 Q