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<?php define('R_MD5_MATCH', '/^[a-f0-9]{32}$/i'); if(preg_match(R_MD5_MATCH, $input_string)) { echo "It matches."; } else { echo "It does not match."; }
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $input_string in /in/KLme1 on line 4 Deprecated: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in /in/KLme1 on line 4 It does not match.

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