PHP伪静态，主要是为了隐藏传递的参数名；于网上搜索后整理伪静态四法
<?php
//伪静态方法一

// localhost/php100/test.php?id|1@action|2
$Php2Html_FileUrl = $_SERVER["REQUEST_URI"];
echo $Php2Html_FileUrl."<br>";// /php100/test.php?id|1@action|2
$Php2Html_UrlString = str_replace("?","",str_replace("/", "", strrchr(strrchr($Php2Html_FileUrl, "/"),"?")));
echo $Php2Html_UrlString."<br>";// id|1@action|2
$Php2Html_UrlQueryStrList = explode("@", $Php2Html_UrlString);
print_r($Php2Html_UrlQueryStrList);// Array ( [0] => id|1 [1] => action|2 )
echo "<br>";
foreach($Php2Html_UrlQueryStrList as $Php2Html_UrlQueryStr)
{
$Php2Html_TmpArray = explode("|", $Php2Html_UrlQueryStr);
print_r($Php2Html_TmpArray);// Array ( [0] => id [1] => 1 ) ; Array ( [0] => action [1] => 2 )
echo "<br>";
$_GET[$Php2Html_TmpArray[0]] = $Php2Html_TmpArray[1];
}
//echo '假静态：$_GET变量<br />';
print_r($_GET); // Array ( [id|1@action|2] => [id] => 1 [action] => 2 )
echo "<br>";
echo "<hr>";
echo $_GET[id]."<br>";// 1
echo $_GET[action];// 2
?>

<?php
//伪静态方法二

// localhost/php100/test.php/1/2
$filename = basename($_SERVER['SCRIPT_NAME']);
echo $_SERVER['SCRIPT_NAME']."<br>";// /php100/test.php
echo $filename."<br>";// test.php

if(strtolower($filename)=='test.php'){
 if(!empty($_GET[id])){
  $id=intval($_GET[id]);
  echo $id."<br>";
  $action=intval($_GET[action]);
  echo $action."<br>";
 }else{
  $nav=$_SERVER['REQUEST_URI'];
  echo "1:".$nav."<br>";// /php100/test.php/1/2
  $script=$_SERVER['SCRIPT_NAME'];
  echo "2:".$script."<br>";// /php100/test.php
  $nav=ereg_replace("^$script","",urldecode($nav));
  echo $nav."<br>"; // /1/2
  $vars=explode("/",$nav);
  print_r($vars);// Array ( [0] => [1] => 1 [2] => 2 )
  echo "<br>";
  $id=intval($vars[1]);
  $action=intval($vars[2]);
 }
 echo $id.'&'.$action;
}
?>

<?php
//伪静态方法三

function mod_rewrite(){
global $_GET;
$nav=$_SERVER["REQUEST_URI"];
echo $nav."<br>";
$script_name=$_SERVER["SCRIPT_NAME"];
echo $script_name."<br>";
$nav=substr(ereg_replace("^$script_name","",urldecode($nav)),1);
echo $nav."<br>";
$nav=preg_replace("/^.ht(m){1}(l){0,1}$/","",$nav);//这句是去掉尾部的.html或.htm
echo $nav."<br>";
$vars = explode("/",$nav);
print_r($vars);
echo "<br>";
for($i=0;$i<Count($vars);$i+=2){
$_GET["$vars[$i]"]=$vars[$i+1];
}
return $_GET;
}
mod_rewrite();
$year=$_GET["year"];//结果为'2006'
echo $year."<br>";
$action=$_GET["action"];//结果为'_add'
echo $action;
?>

<?php
//伪静态方法四

//利用server变量 取得PATH_INFO信息 该例中为 /1,100,8630.html   也就是执行脚本名后面的部分
if(@$path_info =$_SERVER["PATH_INFO"]){
//正则匹配一下参数
if(preg_match("/\/(\d+),(\d+),(\d+)\.html/si",$path_info,$arr_path)){
$gid     =intval($arr_path[1]); //取得值 1
$sid     =intval($arr_path[2]);   //取得值100
$softid   =intval($arr_path[3]);   //取得值8630
}else die("Path:Error!");
//相当于soft.php?gid=1&sid=100&softid=8630
}else die('Path:Nothing!');
?>

PHP防注入，主要是为了防止恶意写入后台数据库；
//防注入函数
function inject_check($sql_str){
 $check=eregi('select|insert|update|delete|\'|\/\*|\*|\.\.\/|\.\/|union|into|load_file
|outfile', $sql_str);
if($check){
 echo "输入非法内容";
 exit();
 }else{
  return $sql_str;
 }
}
//接收传递参数后进行转换
$_GET[type]=inject_check($_GET[type]);
//之后再使用转换后的参数