php 防止sql注入代碼

php教程 防止sql注入代碼

*/ 

 function inject_check($sql_str) { //防止注入
  $check = eregi('select|insert|update|delete|'|/*|*|../|./|union|into|load_file|outfile', $sql_str);
  if ($check) {
   echo "輸入非法注入內容！";
   exit ();
  } else {
   return $sql_str;
  }
 }
 function checkurl() { //檢查來路
  if (preg_replace("/https教程?://([^:/]+).*/i", "1", $_server['http_referer']) !== preg_replace("/([^:]+).*/", "1", $_server['http_host'])) {
   header("location: http://www.zhutiai.com");
   exit();
  }
 }

//調用
checkurl();
$str = $_get['url'];
inject_check($sql_str);//這條可以在獲取參數時執行操作