generating random strings

[laura2k]

hello,

i need a php code that will randomly generate a alphanumeric string that i can use

i came across one at i-fubar.com/random-string-generator.php but the problem is i dont understand it, the person hasnt give the code in complete.

can anyone help?

thanx in advance.

[jatar_k]

paste the 2 functions into a file one after the other. At the end of the 2 functions put the actual call to the function.

like so

<? 
function assign_rand_value($num) { 
 // accepts 1 - 36 
 switch($num) { 
 case "1": 
 $rand_value = "a"; 
 break; 
 case "2": 
 $rand_value = "b"; 
 break; 
 <lots of other code> 
 case "35": 
 $rand_value = "8"; 
 break; 
 case "36": 
 $rand_value = "9"; 
 break; 
 } 
 return $rand_value; 
} 
function get_rand_id($length) { 
 if($length>0) {  
 $rand_id=""; 
 for($i=1; $i<=$length; $i++) { 
  mt_srand((double)microtime() * 1000000); 
  $num = mt_rand(1,36); 
  $rand_id .= assign_rand_value($num); 
 } 
 } 
 return $rand_id; 
}  
$mybignum = get_rand_id(50); // the 50 is the length of the string 
echo $mybignum; 
?>

[laura2k]

thanx jatar_k

[laura2k]

Worked a treat, is there anyway i can actually make the output into all UPPERCASE?

[dcrombie]

Here's one I use:

<?PHP
$str1 = "ABCDEFGHJKLMNPQRSTUVWXYZ";
$str2 = "1234567890";

srand (time());
$split = rand (2, 4);

$id = "";
for ($i=1; $i <= 6; $i++) {
$tmp = ($i <= $split)? $str1 : $str2;
$pos = rand (0, strlen ($tmp)-1);
$id .= substr ($tmp, $pos, 1);
}
?>

It creates a 6-character string starting with 2-4 characters from $str1 followed by characters from $str2.

[jatar_k]

instead of
echo $mybignum;

just try
echo strtoupper [ca.php.net]($mybignum);