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In my application i need to generate random numbers that should contain certain character like capital letter, a number and of certain length. It will be an honor if you guys help me out.

Bijesh Shrestha
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    Generate arrays/lists of characters that you want to require (one for lower, one for upper, one for numbers...etc). Pick however many characters you want from each list and join them together. – Jonathan Kuhn Jan 08 '16 at 18:37
  • You should not just simply join them, though. You should a) randomize the number of characters you take from each list (ensuring the required minimum amount from each list), then *shuffle* the results together so that a hacker doesn't know you first have the lower case, then the upper case, then the numbers. – Eric J. Jan 08 '16 at 18:40
  • post what have you tried please – Heshan Sandeepa Jan 08 '16 at 18:48

2 Answers2

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I have a script that requires the word "Lock" followed by a 2 digit number followed by a random four-letter word. This is an abbreviation of what I used...

$words = array("Pick","Hard","Gene","Boat","Pass");
// Make that list as long as you like...
function get_random_string()
{
    global $words;
    shuffle($words);
    return 'Lock'.rand(10,99).$words[0];
}
kainaw
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function rand_string( $length ) {

    $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    return substr(str_shuffle($chars),0,$length);

}

echo rand_string(8);
Santosh Patel
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