3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo 1 . "\n"; echo strstr('abbaabbaaaabbaaab', 'bb'); echo 2 . "\n"; echo strstr('bbaaaaaaa', 'bb'); echo 3 . "\n"; echo strstr('aaaaaaa', 'bb'); echo 4 . "\n"; echo strstr('aaaaaaa', 'bb'); echo 5 . "\n"; echo strstr('aaaaaaabb', 'bb'); echo 6 . "\n"; echo strstr('aaabbaaaabb', 'bb');
Output for 5.6.38, 7.0.33, 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
1 bbaabbaaaabbaaab2 bbaaaaaaa3 4 5 bb6 bbaaaabb

preferences:
113.19 ms | 403 KiB | 205 Q