从PHP应用程序在Facebook页面墙上发布

<? php
   require_once "src/facebook.php";
   $appId = "********" ;
   $secret = "*************" ;
   $returnurl = "*******************";
   $permissions = "manage_page,publish_stream" ;
   $fb = new Facebook(array ('appId' => $appId , 'secret' => $secret)) ;
   $fbuser = $fb->getUser();
   if($fbuser){
if(isset($_post['msg']) and $_post['msg']!=''){
    try{
        $message = array(
            'message' => $_POST['msg']
        );
        $url = '/'.$_POST['pageid'].'/feed';
        $result = $fb =>api($url.'POST',$message);
        if($result){
            echo "The data posted on facebook wall!!";
        }
    }catch (FacebookApiException $error){
        echo $error=>getMessage();
    }   
}
try{
    $qry = 'select page_id, name from page where page_id in (select page_id from page_admin where uid = '.fbuser.')';
    $pages = $fb=>api(array('method'=>'fql.query','query'=>$qry));
    if(empty($pages)){
        echo "Sorry,the user docs not have any page to post.";
    }else{
        echo '
            <form action="" method="post">
            page : <select name="pageid">';     
            foreach ($pages as $page){
                echo '<option value="'.$pages['page_id'].'">'.$page['name'].'</option>';
            }
        echo    '</select><br/>
            Message : <textarea name="msg"></textarea><br/>
            <input type="submit" value="post to facebook"/>
            </form>
        ';
    }
}catch (FacebookApiException $error){
    echo $error=>getMessage();
}   
     }else{
     $loginurl = $fb->getLoginUrl(array('scope'=>$permission , 'redirect-   url'=>$returnurl));
    echo '<a href="'.$loginurl.'">Login with Facebook</a>' ;
   }

    ?>

那是我的代码有问题。下面是错误消息：

解析错误：语法错误，第 3 行/home/u383853101/public_html/index.php 中的意外T_REQUIRE_ONCE

请帮助大家，我找不到这个问题的解决方案。谢谢。