3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = ""; echo $a[0];
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Uninitialized string offset 0 in /in/ef3ml on line 3
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Uninitialized string offset: 0 in /in/ef3ml on line 3
Output for 7.3.32 - 7.3.33

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345.94 ms | 401 KiB | 377 Q