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Random string generator

/ Published in: PHP
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  1. function str_makerand($length, $useupper, $usespecial, $usenumbers) {
  2.     $charset = "abcdefghijklmnopqrstuvwxyz";
  3.     if ($useupper)
  4.         $charset .= "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  5.     if ($usenumbers)
  6.         $charset .= "0123456789";
  7.     if ($usespecial)
  8.         $charset .= "~@#$%^*()_+-={}|]["; // Note: using all special characters this reads: "~!@#$%^&*()_+`-={}|\\]?[\":;'><,./";
  9.     if ($length == '' || $length == 0)
  10.         $length = mt_rand(10, 40);
  11.     for ($i = 0; $i < $length; $i++)
  12.         $key .= $charset[(mt_rand(0, (strlen($charset) - 1)))];
  13.     return $key;
  14. }

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