3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(substr("foo", ""));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.26, 8.3.0 - 8.3.14, 8.4.1
Fatal error: Uncaught TypeError: substr(): Argument #2 ($offset) must be of type int, string given in /in/WVfeg:3 Stack trace: #0 /in/WVfeg(3): substr('foo', '') #1 {main} thrown in /in/WVfeg on line 3
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: substr() expects parameter 2 to be int, string given in /in/WVfeg on line 3 NULL
Output for 7.2.0 - 7.2.33
Warning: substr() expects parameter 2 to be integer, string given in /in/WVfeg on line 3 NULL

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68.63 ms | 408 KiB | 5 Q