PHP Learning Note: Universal random string generation function (already packaged)

Do the verification code to use, and then the function is encapsulated, using the time to set 2 parameters:

$str set the string to be collected, such as:

$str = ' Efasfgzsrhftjxjxjhsrth ';

Then the string generated in the function will be randomly fetched from the Efasfgzsrhftjxjxjhsrth;

The $codeLen sets the random string to be generated, and sets 5 to generate 5 random strings.

Principle: Random fetch of strings, concatenation of strings

Effect:

Code:

<?php//mt_rand  get random number Mt_rand (min, max); $str = "ABCDEFGHIJKMNPQRSTUVWXYZ0123456789ABCDEFGHIGKLMNPQRSTUVWXYZ" ;//Set the randomly collected string $codelen= ' 5 ';//Set the generated random number of function  Str_rand ($STR, $codeLen) {    $rand = "";    for ($i =0; $i < $codeLen-1; $i + +) {        $rand. = $str [Mt_rand (0, strlen ($str)-1)];  such as: The random number is  : $str [+]    }   return $rand;} $code =str_rand ($str, $codeLen); Echo $code;
?>

　　

PHP Learning Note: Universal random string generation function (already packaged)