3v4l.org

run code in 300+ PHP versions simultaneously
<?php preg_match('/\B@([\w-\.]+)\b/', 'foo');
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.27, 8.0.0 - 8.0.15, 8.1.0 - 8.1.2
Warning: preg_match(): Compilation failed: invalid range in character class at offset 7 in /in/mJLK0 on line 3
Output for 7.2.0 - 7.2.33

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44.63 ms | 460 KiB | 5 Q