Summary of PHP random generation String Program method

Number of randomly generated numbers

Mt_rand () function

The code is as follows	Copy Code
$num = Mt_rand (0,9999999);

But if I want to randomly generate strings how to operate, the Web site finds a way.

The code is as follows	Copy Code
function Random ($length) { Srand (Date ("S")); $possible _charactors = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; $string = ""; while (strlen ($string) < $length) { $string. = substr ($possible _charactors, (rand ()% (strlen ($possible _charactors)), 1); } return ($string); }

Example 2

code is as follows

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function Random_string ($length, $max =false) {   if (Is_int ($max) && $max > $length)   {      $length = Mt_rand ($length, $max);  }   $output = ';     for ($i =0 $i < $length $i + +)   {     $which = Mt_rand (0,2); &nb sp;       if ($which = = 0)     {       $ Output. = Mt_rand (0,9);    }     elseif ($which = = 1)     {       $output. = Chr ( Mt_rand (65,90));    }     Else     {       $output. = Chr (Mt_rand 97,122 ));    }  }   return $output; }

Example 3

The code is as follows

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<?php Description: The method of generating random strings in PHP Finishing: Http://www.111cn.net function genrandomstring ($len) { $chars = Array ( "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "s", "T", "U", "V", "W", "X", "Y", "Z", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" ); $charsLen = count ($chars)-1; Shuffle ($chars); To disrupt an array $output = ""; for ($i =0; $i < $len; $i + +) { $output. = $chars [Mt_rand (0, $charsLen)]; } return $output; } $str = genrandomstring (25); $str. = "<br/>"; $str. = genrandomstring (25); $str. = "<br/>"; $str. = genrandomstring (25); Echo $str; ?>

Note: The incoming parameter is the length of the random string you want to generate.