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/*php ·À×¢È뺯Êý
string  $feifa  ÏÞÖÆÔªËØ×é³É
ÈçÓзǷ¨×Ö·ûÌø×ªµ½ÉÏÒ»Ò³ ·µ»Ø 0  Ã»Óзµ»Ø 1
*/
//ʹÓ÷½·¨
//$feifa=array("select","delete","from","update","create","destory","drop","alter","and","or","like","exec","count","*","chr","mid","master","truncate","char","declare",";","-","+");
//$arrpostget=array("http://www.baidu.select cretecomdmin","wangw");
//echo saftsql($feifa,$arrpostget);
function saftsql($feifa,$arrpostget){
//
$arrpostget=array_merge((array)$HTTP_PSOT_VARS,(array)$HTTP_GET_VARS);
  if($arrpostget){
         foreach($arrpostget as $key=>$value){
              for($i=0;$i<count($feifa);$i++){
                //ÕÒ·Ç·¨×Ö·ûÔÚ$valueÖеÄλÖÃ
                $flag=strpos($value,$feifa[$i]);              
                if($flag)
                {                    
                 echo "<script
type=\"text/javascript\">alert('URLÓзǷ¨×Ö·û');</script>";
               


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//¼ÆËã¾à¹«Ôª1Äê1ÔÂ1ÈÕµÄÌìÊý£¬$yyyyÄê·Ö£¬$mmÔ·ݣ¬$ddÈÕ
function datelocal($yyyy,$mm,$dd){
$monthdays = array(31,28,31,30,31,30,31,31,30,31,30,31); //·ÇÈòÄêµÄÔ·ÝÌìÊý
//ÅжÏÊÇ·ñΪÈòÄ꣬ÈòÄê$leapyear = 1£¬·ñÔò $leapyear = 0
if($yy%4==0 && $yyyy%100!=0 || $yyyy%400==0)
$leapyear = 1;
els ......

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 <?
require('conn.php');
$sql1="select id from news";
$query1=mysql_query($sql1,$conn);
$sun_num=mysql_num_rows($query1);
$gs=20;
$page_num=ceil($sun_num/$gs);
include("../subpage.php");
//´«¹ýÀ´µÄÒ³Êý²ÎÊý
$PB_page=$_GET['PB_page'];
if ($PB_page==1 or empty($PB_page)){
$ ......

php º¯Êý

htmlspecialchars()    
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      ENT_COMPAT - ĬÈÏ¡£½ö±àÂëË«ÒýºÅ¡£
          eg:" £¨Ë«ÒýºÅ£© ³ÉΪ &quot;
implode()    
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Êý×éÔªËØ×éºÏΪһ¸ö×Ö ......
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