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run code in 300+ PHP versions simultaneously
<?php var_dump(mb_strpos('abc', 'a', -1));
Output for 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, 8.3.0 - 8.3.4
bool(false)
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33
Warning: mb_strpos(): Offset not contained in string in /in/o1YNG on line 3 bool(false)

preferences:
206.34 ms | 402 KiB | 287 Q