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<?php function isValidMd5(string $md5 = '') : bool { return strlen($md5) == 32 && ctype_xdigit($md5); } var_dump(isValidMd5(md5('test'))); var_dump(isValidMd5('test'));
Output for git.master, git.master_jit, rfc.property-hooks
bool(true) bool(false)

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