3v4l.org

run code in 300+ PHP versions simultaneously
<?php print $x+1;
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Warning: Undefined variable $x in /in/YtVLM on line 3 1
Output for 7.0.0 - 7.0.31, 7.1.0 - 7.1.21, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: Undefined variable: x in /in/YtVLM on line 3 1
Output for 7.3.32 - 7.3.33, 7.4.26
1

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137.13 ms | 401 KiB | 205 Q