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<?php var_dump(preg_replace("/^[^a-zA-Z]+|[\!\#$\%\&\'\* \+\/\=\?\^\`{\|\}\~]", "",'_(32jkashdfkj$@#!!&&')); var_dump( preg_replace( '|[^a-z0-9_.\-@]|i', '', '_(32jkashdfkj$#!!&&' ));
Output for 4.3.11 - 7.1.0
Warning: preg_replace(): No ending delimiter '/' found in /in/IBZOk on line 2 NULL string(12) "_32jkashdfkj"
Output for 4.3.0 - 4.3.10
Warning: No ending delimiter '/' found in /in/IBZOk on line 2 NULL string(12) "_32jkashdfkj"