教你快速实现PHP全站权限验证

PHP全站权限验证代码示例：

1.  html> 
2.  head> title>e   
3.  /title> 
4.  /head> 
5.  body> 
6.  form action="login.php" 
   method="POST" > 

用户：

1.  input type="text" 
   name="username"> 
2.  br> 

密码：

1.  input type="password" 
   name="password"> 
2.  input type ="Submit"
    value ="确定"> 
3.  input type ="reset"
    value ="取消"> 
4.  /form> 
5.  /body> 
6.  /html> 

----------------conn.php--------------------------

1.  ?php  
2. $host='127.0.0.1';  
3. $mysql_user='root';  
4. $mysql_password='qeephp';  
5. $mydb='learn';  
6. $link = mysql_connect($host, 
   $mysql_user , $mysql_password)  
7. or die("无法连接数据库: " 
   . mysql_error());  
8. mysql_select_db($mydb);  
9. ?> 

----------------------------login.php------------------

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><span> ?  </span></span></span></li>
<li>
<span>$</span><span class="attribute">username</span><span>=$_POST['username'];  </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">password</span><span>=$_POST['password'];  </span>
</li>
<li>
<span>if ($</span><span class="attribute">username</span><span>==""){  </span>
</li>
<li class="alt">
<span>echo "</span><span class="tag"><span> </span><span class="tag-name">script</span><span> </span><span class="attribute">language</span><span>=</span><span class="attribute-value">'javascript'</span><span class="tag">></span><span> <br>alert('非法操作!'); </span><span class="attribute">location.href</span><span>=<br></span><span class="attribute-value">'index.php'</span><span>; </span><span class="tag"><span> /script</span><span class="tag">></span><span>";  </span></span></span>
</li>
<li><span>exit;  </span></li>
<li class="alt"><span>}  </span></li>
<li><span>require_once("conn.php");  </span></li>
<li class="alt">
<span>$</span><span class="attribute">sql</span><span>=</span><span class="attribute-value">"SELECT * FROM admin where<br> username='$username'"</span><span>;  </span>
</li>
<li>
<span>$</span><span class="attribute">result</span><span>=</span><span class="attribute-value">mysql_query</span><span>($sql);  </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">row</span><span>=</span><span class="attribute-value">mysql_fetch_array</span><span>($result);  </span>
</li>
<li><span>if ($row['username']==""){  </span></li>
<li class="alt">
<span>echo "</span><span class="tag"><span> </span><span class="tag-name">script</span><span> </span><span class="attribute">language</span><span>=</span><span class="attribute-value">'javascript'</span><span class="tag">></span><span> <br>alert('用户名有误!'); </span><span class="attribute">location.href</span><span>=<br></span><span class="attribute-value">'index.php'</span><span>; </span><span class="tag"><span> /script</span><span class="tag">></span><span>";  </span></span></span>
</li>
<li><span>exit;  </span></li>
<li class="alt"><span>}else if ($row['password']!=$password){  </span></li>
<li>
<span>echo "</span><span class="tag"><span> </span><span class="tag-name">script</span><span> </span><span class="attribute">language</span><span>=</span><span class="attribute-value">'javascript'</span><span class="tag">></span><span> <br>alert('密码有误!'); </span><span class="attribute">location.href</span><span>=</span><span class="attribute-value">'index<br>.php'</span><span>; </span><span class="tag"><span> /script</span><span class="tag">></span><span>";  </span></span></span>
</li>
<li class="alt"><span>echo "密码有误";  </span></li>
<li><span>exit;  </span></li>
<li class="alt"><span>}else{  </span></li>
<li><span>session_start();  </span></li>
<li class="alt"><span>$_SESSION['user']=$username;  </span></li>
<li>
<span>echo "</span><span class="tag"><span> </span><span class="tag-name">script</span><span> </span><span class="attribute">language</span><span>=</span><span class="attribute-value">'javascript'</span><span class="tag">></span><span> <br>alert('登陆成功!'); </span><span class="attribute">location.href</span><span>=<br></span><span class="attribute-value">'list.php'</span><span>; </span><span class="tag"><span> /script</span><span class="tag">></span><span>";  </span></span></span>
</li>
<li class="alt"><span>}  </span></li>
<li>
<span class="tag">?></span><span> </span>
</li>
</ol>

------------------check.php--------------------

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><span> ?  </span></span></span></li>
<li><span>session_start();   </span></li>
<li class="alt"><span>if(! isset($_SESSION['user']))   </span></li>
<li><span>{   </span></li>
<li class="alt">
<span>echo "</span><span class="tag"><span> </span><span class="tag-name">script</span><span> </span><span class="attribute">language</span><span>=</span><span class="attribute-value">'javascript'</span><span class="tag">></span><span> <br>alert('非法操作!'); </span><span class="attribute">location.href</span><span>=<br></span><span class="attribute-value">'index.php'</span><span>; </span><span class="tag"><span> /script</span><span class="tag">></span><span>";  </span></span></span>
</li>
<li><span>exit;  </span></li>
<li class="alt"><span>}else{  </span></li>
<li><span>echo "欢迎".$_SESSION['user']<br>."登录系统";   </span></li>
<li class="alt"><span>}  </span></li>
<li>
<span class="tag">?></span><span> </span>
</li>
</ol>

---------------------list.php-----------------

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><span> ?  </span></span></span></li>
<li><span>include 'check.php';  </span></li>
<li class="alt">
<span class="tag">?></span><span> </span>
</li>
<li><span class="tag"><span> </span><span class="tag-name">html</span><span class="tag">></span><span> </span></span></li>
<li class="alt"><span class="tag"><span> </span><span class="tag-name">head</span><span class="tag">></span><span> </span></span></li>
<li><span class="tag"><span> </span><span class="tag-name">script</span><span> </span><span class="attribute">type</span><span>=</span><span class="attribute-value">"text/javascript"</span><span> <br></span><span class="attribute">src</span><span>=</span><span class="attribute-value">"player/swfobject.js"</span><span class="tag">></span><span class="tag"><span> /script</span><span class="tag">></span><span> </span></span></span></li>
<li class="alt"><span class="tag"><span> /head</span><span class="tag">></span><span> </span></span></li>
<li><span class="tag"><span> </span><span class="tag-name">body</span><span class="tag">></span><span> </span></span></li>
<li class="alt"><span class="tag"><span> </span><span class="tag-name">h3</span><span class="tag">></span><span>单个文件播放:</span><span class="tag"><span> /h3</span><span class="tag">></span><span> </span></span></span></li>
<li><span class="tag"><span> </span><span class="tag-name">p</span><span> </span><span class="attribute">id</span><span>=</span><span class="attribute-value">"player1"</span><span class="tag">></span><span class="tag"><span> </span><span class="tag-name">a</span><span> </span><span class="attribute">href</span><span>=</span><span class="attribute-value">"<br>http://www.macromedia.com/go/<br>getflashplayer"</span><span class="tag">></span><span>获取播放器</span><span class="tag"><span> /a</span><span class="tag">></span><span> 观看电影</span><span class="tag"><span> /p</span><span class="tag">></span><span> </span></span></span></span></span></li>
<li class="alt"><span class="tag"><span> </span><span class="tag-name">script</span><span> </span><span class="attribute">type</span><span>=</span><span class="attribute-value">"text/javascript"</span><span class="tag">></span><span> </span></span></li>
<li>
<span>var </span><span class="attribute">s1</span><span> = </span><span class="attribute-value">new</span><span> SWFObject("player/<br>flvplayer.swf","single","300","170","7");  </span>
</li>
<li class="alt"><span>s1.addParam("allowfullscreen","true");  </span></li>
<li><span>s1.addVariable("file","player/ad.flv");  </span></li>
<li class="alt"><span>s1.addVariable("image","player/preview.jpg");  </span></li>
<li><span>s1.addVariable("width","300");  </span></li>
<li class="alt"><span>s1.addVariable("height","170");  </span></li>
<li><span>s1.write("player1");  </span></li>
<li class="alt"><span class="tag"><span> /script</span><span class="tag">></span><span> </span></span></li>
<li><span class="tag"><span> </span><span class="tag-name">h3</span><span class="tag">></span><span>playlist file, with different <br>colors:</span><span class="tag"><span> /h3</span><span class="tag">></span><span> </span></span></span></li>
<li class="alt"><span class="tag"><span> </span><span class="tag-name">p</span><span> </span><span class="attribute">id</span><span>=</span><span class="attribute-value">"player2"</span><span class="tag">></span><span class="tag"><span> </span><span class="tag-name">a</span><span> </span><span class="attribute">href</span><span>=</span><span class="attribute-value">"http:<br>//www.macromedia.com/go/getflashplayer"</span><span class="tag">><br></span><span>Get the Flash Player</span><span class="tag"><span> /a</span><span class="tag">></span><span> to see this player.</span><span class="tag"><span> /p</span><span class="tag">></span><span> </span></span></span></span></span></li>
<li><span class="tag"><span> </span><span class="tag-name">script</span><span> </span><span class="attribute">type</span><span>=</span><span class="attribute-value">"text/javascript"</span><span class="tag">></span><span> </span></span></li>
<li class="alt">
<span>var </span><span class="attribute">s2</span><span> = </span><span class="attribute-value">new</span><span> SWFObject("player/flvplayer<br>.swf","playlist","300","312","7");  </span>
</li>
<li><span>s2.addParam("allowfullscreen","true");  </span></li>
<li class="alt"><span>s2.addVariable("file","player/playlist.xml");  </span></li>
<li><span>s2.addVariable("displayheight","200");  </span></li>
<li class="alt"><span>s2.addVariable("backcolor","0x000000");  </span></li>
<li><span>s2.addVariable("frontcolor","0xCCCCCC");  </span></li>
<li class="alt"><span>s2.addVariable("lightcolor","0x557722");  </span></li>
<li><span>s2.addVariable("width","300");  </span></li>
<li class="alt"><span>s2.addVariable("height","312");  </span></li>
<li><span>s2.write("player2");  </span></li>
<li class="alt"><span class="tag"><span> /script</span><span class="tag">></span><span> </span></span></li>
<li><span class="tag"><span> /body</span><span class="tag">></span><span> </span></span></li>
<li class="alt"><span class="tag"><span> /html</span><span class="tag">></span><span> </span></span></li>
</ol>

--------------------logout.php-------------------------

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><span> ?php   </span></span></span></li>
<li><span>unset($_SESSION['user']);   </span></li>
<li class="alt"><span>unset($_SESSION['password']);   </span></li>
<li><span>echo "注销成功";   </span></li>
<li class="alt">
<span class="tag">?></span><span> </span>
</li>
</ol>

以上就是PHP全站权限验证的具体实现方法。