<?php function randomString($length = 6) { $pre = $suf = ""; $characters = array_merge(range('a','z'), range('0','9')); $max = count($characters) - 1; for ($i = 0; $i < $length; $i++) { $rand = mt_rand(0, $max); $pre .= $characters[$rand]; $rand = mt_rand(0, $max); $suf .= $characters[$rand]; } return $pre . time() . $suf; } echo randomString();
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