3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(strstr('\/\/', 'https://school.nestonline.jp/')); var_dump(strpos('/','\/\///')); var_dump("\500"); var_dump('\500'); var_dump('/');
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 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: Octal escape sequence overflow \500 is greater than \377 in /in/TMU44 on line 4 bool(false) bool(false) string(1) "@" string(4) "\500" string(1) "/"
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, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20
bool(false) bool(false) string(1) "@" string(4) "\500" string(1) "/"

preferences:
208.95 ms | 404 KiB | 357 Q