[SOLVED] rand function

[maxic0]

I was looking up and learning about functions, and i was given this example to create a random password.

 

<?php


function rand_pass() {

$chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890abcdefghijklmnopqrstuvwxyz";

$thepass = '';

for($i=0;$i<10;$i++)

{

  $thepass .= $chars{rand() % 39};

}

return $thepass;

}   


$password= rand_pass();


echo $password;


?>

 

 

I understand it all apart from the

  $thepass .= $chars{rand() % 39};

 

 

What does the "% 39" bit mean?

 

Thanks.

[wildteen88]

it selects a character from the 39 characters in the $chars variable

 

also % is the modulos operator. it returns the remainder from a division sum.

[maxic0]

Ok, thanks wildteen88