PHP generates random string program code_PHP tutorial

Because the tool requires us to write a function that can generate random strings. I was thinking that there should be many such random string generating functions on the Internet. I searched a lot on Baidu. Now I will summarize these good PHP functions for you. .

Use a for loop to traverse the characters we defined

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The code is as follows

代码如下	复制代码
/* Generate Password * Length : 8 */ $str = “0123456789abcdefghijklmnopqrstuvwxyz”;   //   输出字符集 $n = 8;   //   输出串长度 $len = strlen($str)-1; for($i=0 ; $i $s .=  $str[rand(0,$len)]; } echo $s . “ ”; ?>

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/* Generate Password
* Length: 8 */

代码如下	复制代码
function getRandStr($length) {  $str = 'abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'; $randString = ''; $len = strlen($str)-1; for($i = 0;$i $num = mt_rand(0, $len); $randString .= $str[$num]; } return $randString ;  } //使用方法如下 $test=getRandStr($length=5); echo $test; ?>

$str = “0123456789abcdefghijklmnopqrstuvwxyz”; // Output character set

$n = 8; // Output string length

$len = strlen($str)-1;

代码如下	复制代码
/**   */  function createRandomStr($length){   $str = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';//62个字符   $strlen = 62;   while($length > $strlen){    $str .= $str;    $strlen += 62;   }   $str = str_shuffle($str);   return substr($str,0,$length);  } echo createRandomStr(10); ?>

for($i=0; $i $s .= $str[rand(0,$len)]; }

代码如下	复制代码
/**   *@blog   */  function createRandomStr($length){   $str = array_merge(range(0,9),range('a','z'),range('A','Z'));   shuffle($str);   $str = implode('',array_slice($str,0,$length));   return $str;  }  echo createRandomStr(10); ?>

echo $s . “
”;

Can generate pure numeric strings, character strings, etc. of specified length. (Uppercase, lowercase, uppercase and lowercase, and a combination of uppercase and lowercase and numbers can also be expanded according to preference). $length=5 below, if you change it to 10, it will be 10 digits. Change $str = 'abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ' to $str = '0123456789' which is a pure numeric string.

The code is as follows

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function getRandStr($length) { $str = 'abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'; $randString = ''; $len = strlen($str)-1; for($i = 0;$i $num = mt_rand(0, $len); $randString .= $str[$num]; } return $randString ; } //How to use it is as follows $test=getRandStr($length=5); echo $test; ?> or use while

The code is as follows

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/**  */ function createRandomStr($length){ $str = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';//62 characters $strlen = 62; while($length > $strlen){ $str .= $str; $strlen += 62; } $str = str_shuffle($str); Return substr($str,0,$length); } echo createRandomStr(10); ?> Use the idea of ​​array and character conversion:

The code is as follows

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/**   *@blog  *@blog */ function createRandomStr($length){ $str = array_merge(range(0,9),range('a','z'),range('A','Z')); shuffle($str); $str = implode('',array_slice($str,0,$length)); return $str; } echo createRandomStr(10); ?> http://www.bkjia.com/PHPjc/631543.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/631543.htmlTechArticleBecause the tool requires us to write a function that can generate random strings. I think there should be many such functions on the Internet. Generate random string functions, Baidu has a lot of them, and I will give them below...