random_number_generator.php

<?php

$Remote_station_login_Key = randomPassword(25,1, "lower_case,upper_case,numbers,special_symbols");
echo "key =" .$Remote_station_login_Key[0]."\n";
function randomPassword($length,$count, $characters) {

// $length - the length of the generated password
// $count - number of passwords to be generated
// $characters - types of characters to be used in the password

// define variables used within the function    
    $symbols = array();
    $passwords = array();
    $used_symbols = '';
    $pass = '';

// an array of different character types    
    $symbols["lower_case"] = 'abcdefghijklmnopqrstuvwxyz';
    $symbols["upper_case"] = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
    $symbols["numbers"] = '1234567890';
    $symbols["special_symbols"] = '!?~@#-_+<>[]{}';

    $characters = explode(",",$characters); // get characters types to be used for the passsword
    foreach ($characters as $key=>$value) {
        $used_symbols .= $symbols[$value]; // build a string with all characters
    }
    $symbols_length = strlen($used_symbols) - 1; //strlen starts from 0 so to get number of characters deduct 1

    for ($p = 0; $p < $count; $p++) {
        $pass = '';
        for ($i = 0; $i < $length; $i++) {
            $n = rand(0, $symbols_length); // get a random character from the string with all characters
            $pass .= $used_symbols[$n]; // add the character to the password string
        }
        $passwords[] = $pass;
    }

    return $passwords; // return the generated password
}

?>