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<?php function clean($string) { return preg_replace('/[^A-Za-z0-9\-/]/', '', $string);; } var_dump(clean(' abcDEF123/-_~àéèùïî% *\@& '));
based on s2kOJ
Output for 5.6.0 - 5.6.30, 7.0.0 - 7.2.6
Warning: preg_replace(): Unknown modifier ']' in /in/rdCSr on line 4 NULL
Output for hhvm-3.15.4
Warning: Unknown modifier ']': [/[^A-Za-z0-9\-/]/] in /in/rdCSr on line 4 NULL