3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = array(); $foo('a') = 'aaa'; $foo('b') = 'bbb'; var_dump($foo);
Output for 7.1.0 - 7.1.21, 7.2.0 - 7.2.10
Fatal error: Can't use function return value in write context in /in/tvtRY on line 4
Process exited with code 255.
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189.17 ms | 1395 KiB | 40 Q