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run code in 200+ php & hhvm versions
Bugs & Features
<?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, $match)); var_dump($match); }
based on HmcSK
Output for 4.3.0 - 7.2.0
int(0) array(0) { } int(0) array(0) { } int(1) array(1) { [0]=> string(0) "" }