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From Buff Crocodile, 6 Years ago, written in PHP.
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  1. function safe_sql($query) {
  2.         global $sys, $locale, $pageStatus, $pageStatusName;
  3.  
  4.         if(stristr($query, "union")) die('UNION');
  5.  
  6.         if(stristr($sys['url'], "localhost") || admlt() == true) {
  7.                 $sql = mysqli_query($sys['mysqli']['connection'],$query) or die('SQL: <br>Errno: '.mysqli_errno($sys['mysqli']['connection']).'<br>Error: '.mysqli_error($sys['mysqli']['connection']).'<br> '.$_SERVER['REQUEST_URI']);
  8.         } else {
  9.                 $sql = mysqli_query($sys['mysqli']['connection'], $query) or die('SQL');
  10.         }
  11.  
  12.   return $sql;
  13.  
  14. }