3v4l.org

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<?php print preg_replace("~(&[^;]*(*SKIP)(*F)|um)~", "R&auml;ume", "__");
Output for 4.4.9, 5.2.5 - 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, 7.1.0 - 7.1.25, 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
__
Output for 4.3.11, 4.4.0 - 4.4.8, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.4
Warning: preg_replace(): Compilation failed: nothing to repeat at offset 8 in /in/hWHsP on line 3
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: nothing to repeat at offset 8 in /in/hWHsP on line 3

preferences:
245.05 ms | 401 KiB | 366 Q