PHP generates a simple implementation of the specified random string, PHP generates a string _php tutorial

PHP generates a simple implementation of a specified random string, and PHP generates a string

This article describes a simple implementation of PHP to generate a specified random string. Share to everyone for your reference. The specific analysis is as follows:

This is a simple function that does not force the generated content to be set. So when the resulting string length is small, there is a case where no type character is specified. Of course, the changes are also very simple, here do not add.

/** * @param string $type * @param $length * @return string */function randomstring ($type = "Number,upper,lower", $length) {
   $valid _type = Array (' number ', ' upper ', ' lower ');  $case = Explode (",", $type);  $count = count ($case);  Determines whether the argument is valid if  ($count!== count (Array_intersect ($case, $valid _type)) {    return false;  }  according to the intersection) $lower = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";  $upper = Strtoupper ($lower);  $number = "0123456789";  $str _list = "";  for ($i =0; $i < $count; + + $i) {    $str _list. = $ $case [$i];  }  Return substr (Str_shuffle ($str _list), 0, $length);} Echo randomstring ("Number,upper,lower", 12);

I hope this article is helpful to everyone's PHP programming.

http://www.bkjia.com/PHPjc/977791.html www.bkjia.com true http://www.bkjia.com/PHPjc/977791.html techarticle PHP generates a simple implementation of a specified random string, and PHP generates a string This article describes a simple implementation of PHP to generate a specified random string. Share to everyone for your reference. ...

