摘要： function getRandoms($length) {$arr1 = range(0, 9); //$arr2 = range('a','z');//$arr3 = range('A','Z');//$pattern = array_merge($arr1,$arr2,$arr3); //合并数组//$len = count($pattern) - 1;$len = count($arr1) - 1;$key = "";for($i = 0; $i < $length; $i ++) {//$key 阅读全文