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<?php $_POST['keywords']="sample products!\@, products#$#\, sample"; $keywords = preg_replace("/\g/", ',',($_POST['keywords'])); echo $keywords;
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: preg_replace(): Compilation failed: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number at offset 2 in /in/oI4FQ on line 3
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.5, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.1, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
sample products!\@, products#$#\, sample
Output for 4.4.9, 5.2.7 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Warning: preg_replace(): Compilation failed: a numbered reference must not be zero at offset 1 in /in/oI4FQ on line 3
Output for 5.2.5 - 5.2.6
Warning: preg_replace(): Compilation failed: \g is not followed by a braced name or an optionally braced non-zero number at offset 1 in /in/oI4FQ on line 3
Output for 5.2.4
Warning: preg_replace(): Compilation failed: \g is not followed by a braced name or an optionally braced non-zero number at offset 0 in /in/oI4FQ on line 3
Output for 4.4.6 - 4.4.8, 5.2.2 - 5.2.3
Warning: preg_replace(): Compilation failed: \g is not followed by an (optionally braced) non-zero number at offset 0 in /in/oI4FQ on line 3

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175.7 ms | 402 KiB | 337 Q