a method of selecting random characters from given string

Question

Can anyone help me with a solution that pulls the position and value of a random character from a given string using PHP. For example I have a a string variable $string = \

Answer 1

For anyone who might want to use it for the same case like mine:

I just wrote a simple SecretGenerator:

echo generateSecret(10);

function generateSecret($length) {
$chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789&!^§\$ß";
$key = "";
for($i = 0; $i <= $length; $i++){
    $key .= $chars[mt_rand(0, strlen($chars)-1)];
}
    return $key;
}

Will return something like this: "6qß^0UoH7NP"

Of course, this is not a secure function, but for generating simple Hashes it's quite okay to use.