3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = 'z'; $x++; var_dump($x); $x--; var_dump($x);
Output for 8.3.0 - 8.3.4
string(2) "aa" Deprecated: Decrement on non-numeric string has no effect and is deprecated in /in/r28h0 on line 5 string(2) "aa"
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17
string(2) "aa" string(2) "aa"

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