Php uses the specified character list to generate a random string

This article describes how to use php to generate a random string using a specified character list. it involves the skills related to operating strings using functions such as rand and substr in php, which is very simple and practical, for more information about how to generate a random string using the specified character list in php, see the following example. Share it with you for your reference. The details are as follows:

<? Phpfunction randomString ($ len) {srand (date ("s"); $ possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890! @ # $ % ^ & * () "; $ Str =" "; while (strlen ($ str) <$ len) {$ str. = substr ($ possible, (rand () % (strlen ($ possible), 1) ;}return ($ str) ;}?>

I hope this article will help you with php programming.