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Random AlphaNumeric String

/ Published in: PHP
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just a random string generator function, usefull in captcha building process for example, or in case of random password needed.

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  1. function randStr($length=6)
  2. {
  3.     $str = "";
  4.     $characters = "abcdefghjkmnpqrstwxyz123456789";
  5.     $maxlength = strlen($characters);
  6.     if ($length > $maxlength) {
  7.       $length = $maxlength;
  8.     }
  9.     $i = 0; 
  10.     while ($i < $length) { 
  11.       $char = substr($characters, mt_rand(0, $maxlength-1), 1);
  12.       if (!strstr($str, $char)) { 
  13.         $str .= $char;
  14.         $i++;
  15.       }
  16.  
  17.     }
  18.     return $str; 
  19. }

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