Generating random letters and numbers ?

[jd2007]

How to generate random letters and numbers with php ? 

[metrostars]

For numbers: rand(0, 15);

 

where 0 is the lowest and 15 is the highest number.

 

For random letters i usually do something like:

 

md5(rand(0, 10000));

 

OR:

 

str_shuffle(abcdefghijklmnopqrstuvwxyz); is also a possibility.

[chigley]

MD5 also contains letters so you can just do an md5 of a random number and use substr() to cut it to the right length!

[jd2007]

thanks,  guys !

[Wuhtzu]

I always do something like this when creating a string of a certain length comprised of certain characters:

 

//Length of the random string
$length = 8;

//Specify which characters you want in your string. Here it's letters (a-z)
$characters = range(a-z);

//Create the string with a while loop
$i = 1;
while($i <= $length) {
  $string .= $characters[rand(0,count($characters))];
  $i++;
}

[lewis987]

or you can use this simple code:

 

$rand1 = rand(3,86);
$rand2 = rand(25,66);
$random_number = mktime() * $rand1 + $rand1 * $rand2;