Generating a random numbers and letters

Question

Can I ask for a certain code on how to generate a random letters and numbers in one word. I know there\'s a PHP function rand(), but I don\'t know if it\'s also applicable w

Answer 1

This will create random alpha num string based on variable chars:

function createRandomCode() 
{     
    $chars = "abcdefghijkmnopqrstuvwxyz023456789";     
    srand((double) microtime() * 1000000);     

    $i = 0;     
    $pass = '';  

    while ($i <= 7) 
    {         
        $num = rand() % 33;         
        $tmp = substr($chars, $num, 1);         
        $pass = $pass . $tmp;         
        $i++;     
    }    

    return $pass; 
}

Use this function as $random = createRandomCode();

Answer 2

What about this simple code. This will generate 10 characters,you can limit characters by modifying the limits (0,10)

$str = substr(md5(time()), 0, 10);
echo $str; //7aca159655

Answer 3

this one easy

echo strtr(substr(str_shuffle('abcdefghijklmnopqrstuvwxyz0123456789.11.12.13.14.15.16.17.18.19.20'),1,20),array("."=>""));