如何用php生成1-10之间的不重复随机数？
例1，使用shuffle函数生成随机数。
<?php$arr=range(1,10);shuffle($arr);foreach($arr as $values){ echo $values." ";}?> 例2，使用array_unique函数生成随机数。
<?php$arr=array();while(count($arr)<10){ $arr[]=rand(1,10); $arr=array_unique($arr);}echo implode(" ",$arr);?> 例3，使用array_flip函数生成随机数，可以去掉重复值。
<?php$arr=array();$count1=0;$count = 0;$return = array();while ($count < 10) { $return[] = mt_rand(1, 10); $return = array_flip(array_flip($return)); $count = count($return); } //www.vevb.comforeach($return as $value) { echo $value." "; }echo "<br/>";$arr=array_values($return);// 获得数组的值 foreach($arr as $key)echo $key." ";?> php随机数生成函数示例
<?phpfunction randpw($len=8,$format='ALL'){$is_abc = $is_numer = 0;$password = $tmp =''; switch($format){case 'ALL':$chars='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';break;case 'CHAR':$chars='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';break;case 'NUMBER':$chars='0123456789';break;default :$chars='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';break;} // www.vevb.commt_srand((double)microtime()*1000000*getmypid());while(strlen($password)<$len){$tmp =substr($chars,(mt_rand()%strlen($chars)),1);if(($is_numer <> 1 && is_numeric($tmp) && $tmp > 0 )|| $format == 'CHAR'){$is_numer = 1;}if(($is_abc <> 1 && preg_match('/[a-zA-Z]/',$tmp)) || $format == 'NUMBER'){$is_abc = 1;}$password.= $tmp;}if($is_numer <> 1 || $is_abc <> 1 || empty($password) ){$password = randpw($len,$format);}return $password;}for($i = 0 ; $i < 10; $i++){echo randpw(8,'NUMBER');echo "<br>";} 
