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<?php $s = '!¾a’z„  ]¹g¤FÉæ[øšwô'; $b = 'kaskkasdkaksd'; foreach (array($s, $b, '') as $i) var_dump(preg_match('/^[\\x00\\x08\\x0B\\x0C\\x0E-\\x1F]*$/', $i));
Output for git.master, git.master_jit, rfc.property-hooks
int(0) int(0) int(1)

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