重新声明

Question

我有这三个文件： 的index.php：

<div class="tweet_bx"> 
    <form method="post" name="m_gigs" id="m_gigs" enctype="multipart/form-data" action="index.php"> 
     <table width="100%" border="0" cellspacing="0" cellpadding="0"> 
     <tr> 
     <td width="17%"><strong>Filter gigs by</strong></td> 
     <td class="<?php echo $class1; ?>" width="8%" align="center" ><a class="cuuuent" href="index.php?gigs=latest" >Latest</a></td> 
     <td class="<?php echo $class2; ?>" width="15%" align="center"><a href="index.php?gigs=popular">Most Popular</a></td> 
     <td class="<?php echo $class3; ?>" width="15%" align="center"><a href="index.php?gigs=rating" >Best Ratings</a></td> 

     </tr> 
    </table> 
    <table> 
    <?php 
    include('Sql.php'); 
    $c = new connexion(); 
    $videos= $c->getVideos(); 
    for($i=0;$i<sizeof($videos); $i++) 
    { 
    ?> 
    <tr><td colspan = "2"><img src="<?php echo $videos[$i]['image']; ?> " /></td> 
     <td><label color="blue"><?php echo $videos[$i]['titre']; ?></label></td> 

    </tr> 
    <tr> 
    <td><label color="blue"><?php echo $videos[$i]['description']; ?></label></td> 
    </tr> 


    <?php 
    } 
    ?> 

    </table> 

    </form> 
    </div> 

    <div class="tweet_bx"> 
    <?php 





    ?> 

    </div> 
    </div> 
    <?php include('right.php'); ?> 
    </div> 

文件right.php：

<div class="right_box"> 
<div class="right_box_center"> 
<ul> 
<?php 
include('Sql.php'); 

$c = new connexion(); 
$categories = $c->getCategories(); 
for($i=0;$i<sizeof($categories) ; $i++){ 


?> 
<li><a href="index.php?categorie=<?php echo $categories[$i]['categorie'];?>"><?php echo $categories[$i]['categorie'];?></a> </li> 

    <?php 
    } 
    ?> 
    </ul> 
    </div> 
<img align="middle" src="images/img.jpg" /> 
<a href="javascript:popup()"> <img align="middle" src="images/invite.jpg" style="padding-left:32px;" /></a> 

</div> 

最后文件sql.php ：

<?php 
class connexion { 
    function __construct(){ 
    $HOST_DB ="mysql11.000webhost.com"; 
    $NAME_DB="a1638637_fiverr"; 
    $USER_DB ="a1638637_afif"; 
    $PWD_DB="azerty2012"; 
    $connect = mysql_connect($HOST_DB,$USER_DB,$PWD_DB) or die(); 
     $db=mysql_select_db($NAME_DB); 
     } 
    //Registration part 
function register($email,$login,$pass){ 
$verif_email= $this->exists($email,0); 
$verif_user = $this->exists($user,1); 
if(!$verif_email && !$verif_user){ 
           $requete_insert_tem ="INSERT INTO member (`email`,`user`,`password`) VALUES ('".$email."', '".$login."','".$pass."'); "; 
           mysql_query($requete_insert_tem) or die(); 
           return true; 
           } 
else return false;        



} 

function exists($attribut,$number){ 
if($number==0){ 
$Log_query=mysql_query("SELECT * FROM member WHERE email ='$attribut'") or die(mysql_error()); 
if ($Log_query == true && mysql_num_rows($Log_query) >0)return true; 
else return false;     
} 
if($number==1){ 
$Log_query=mysql_query("SELECT * FROM member WHERE user ='$attribut'") or die(mysql_error()); 
if ($Log_query == true && mysql_num_rows($Log_query) >0)return true; 
else return false; 
} 
} 

//login part 
function login($attr, $pass){ 
$verif_email= $this->exists($attr,0); 
$verif_user = $this->exists($attr,1); 
if($verif_email){ 
$Log_query=mysql_query("SELECT * FROM member WHERE email ='$attr' AND password = '$pass'") or die(mysql_error()); 
if ($Log_query == true && mysql_num_rows($Log_query) >0) { 
         $p=0; 
          while ($Res_user = mysql_fetch_array($Log_query)) { 
         $marques[$p] = $Res_user; 
         $p++; 
         } 
         } 
       return $marques; 
} 
if($verif_user){ 
$Log_query=mysql_query("SELECT * FROM member WHERE user ='$attr' AND password = '$pass'") or die(mysql_error()); 
if ($Log_query == true && mysql_num_rows($Log_query) >0) { 
         $p=0; 
          while ($Res_user = mysql_fetch_array($Log_query)) { 
         $marques[$p] = $Res_user; 
         $p++; 
         } 
         } 
       return $marques; 
} 
return null; 


} 

function getCategories(){ 
$Log_query=mysql_query("SELECT distinct(categorie) FROM video ") ; 
if ($Log_query == true && mysql_num_rows($Log_query) >0) { 
         $p=0; 
          while ($Res_user = mysql_fetch_array($Log_query)) { 
         $marques[$p] = $Res_user; 
         $p++; 
         } 
         } 
       return $marques; 
} 

function getVideos(){ 
$Log_query=mysql_query("SELECT * FROM video ") ; 
if ($Log_query == true && mysql_num_rows($Log_query) >0) { 
         $p=0; 
          while ($Res_user = mysql_fetch_array($Log_query)) { 
         $marques[$p] = $Res_user; 
         $p++; 
         } 
         } 
       return $marques; 




} 

} 
?> 

我有这个错误：Fatal error: Cannot redeclare class connexion in /home/a1638637/public_html/Sql.php on line 2。但我没有重新声明类连接！
我认为这个问题是在right.php文件，因为：

• 右侧部分不工作
• 出现的错误
  来修复这个错误，我需要知道
• 什么是错误？
• 我该如何解决它？

Answer 1

您需要使用require_once而不是include。 SQl.php文件被读取和解析两次，因此它会尝试重新声明已声明的类。有了require_once，这不会发生。