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<?php $subject = "ASDASDAS"; $pattern = array('/[^a-zA-Z0-9]/'); $replace = NULL; var_dump(preg_filter($pattern, $replace, $subject));
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: preg_filter(): Passing null to parameter #2 ($replacement) of type array|string is deprecated in /in/9k5Pu on line 6 NULL

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