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run code in 200+ php & hhvm versions
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<?php $source = mb_convert_encoding('test', "unicode", "utf-8"); $source = unpack('C*', $source); var_dump($source);
Output for 4.3.0 - 7.2.0
array(8) { [1]=> int(0) [2]=> int(116) [3]=> int(0) [4]=> int(101) [5]=> int(0) [6]=> int(115) [7]=> int(0) [8]=> int(116) }