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<?php $a = '"b;a"'; var_dump($a); var_dump(str_replace('"', "", $a));
Output for 7.1.5, 7.3.24 - 7.3.33, 7.4.12 - 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
string(5) ""b;a"" string(3) "b;a"

preferences:
128.61 ms | 402 KiB | 115 Q