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<?php $key = md5("0876"); $i = 0; $str = ""; while ($i < strlen($key)) { if (strpos($str, $key[$i]) === false) { $str .= $key[$i]; } $i++; } echo $str;
Output for git.master, git.master_jit, rfc.property-hooks
293b18f7506ad4e

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