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Share three methods of generating random numbers in php. Generate non-repeating random numbers between 1-10. Examples of php generating non-repeating random numbers. Friends in need can refer to
How to generate with php A non-repeating random number between 1-10?
Example 1, use shuffle function to generate random numbers.
<?php $arr=range(1,10); shuffle($arr); foreach($arr as $values) { echo $values." "; } ?>
Example 2, use array_unique function to generate random numbers.
<?php $arr=array(); while(count($arr)<10) { $arr[]=rand(1,10); $arr=array_unique($arr); } echo implode(" ",$arr); ?>
Example 3, use the array_flip function to generate random numbers, which can remove duplicate values.
<?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.jb51.net foreach($return as $value) { echo $value." "; } echo "<br/>"; $arr=array_values($return);// 获得数组的值 foreach($arr as $key) echo $key." "; ?>
php random number generation function example
<?php function randpw($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 : $chars='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'; break; } // www.jb51.net mt_srand((double)microtime()*1000000*getmypid()); while(strlen($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>"; }
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