3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(preg_replace( regex: '/{[\w_]+}/', replace: 'a', subject: 'a b / c', limit: 1 ));
Output for 8.1.23 - 8.1.34, 8.2.10 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Fatal error: Uncaught Error: Unknown named parameter $regex in /in/V5fGH:4 Stack trace: #0 {main} thrown in /in/V5fGH on line 4
Process exited with code 255.
Output for 7.3.0 - 7.3.23, 7.4.0 - 7.4.11
Parse error: syntax error, unexpected ':', expecting ')' in /in/V5fGH on line 4
Process exited with code 255.
Output for 7.2.0 - 7.2.34
Parse error: syntax error, unexpected ':', expecting ',' or ')' in /in/V5fGH on line 4
Process exited with code 255.
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67.15 ms | 1153 KiB | 4 Q