我正在尝试更新和添加文章到自定义编码的博客使用pdo。
我可以阅读和删除罚款，但添加或编辑他们不工作的实时服务器。
它在xampp上运行良好。。。
我已经确保在我的数据库上启用了pdo\umysql扩展。
不知问题出在哪里？
我的编辑邮政编码如下所示：

<?php

//if form has been submitted process it
if(isset($_POST['submit'])){

    //collect form data
    extract($_POST);

    //very basic validation
    if($postID ==''){
        $error[] = 'This post is missing a valid id!.';
    }

    if($postTitle ==''){
        $error[] = 'Please enter the title.';
    }

    if($postDesc ==''){
        $error[] = 'Please enter the description.';
    }

    if($postCont ==''){
        $error[] = 'Please enter the content.';
    }

    if(!isset($error)){

        try {

            $postSlug = slug($postTitle);

            //insert into database
            $stmt = $db->prepare('UPDATE blog_posts_seo SET postTitle = :postTitle, postSlug = :postSlug, postDesc = :postDesc, postCont = :postCont WHERE postID = :postID') ;
            $stmt->execute(array(
                ':postTitle' => $postTitle,
                ':postSlug' => $postSlug,
                ':postDesc' => $postDesc,
                ':postCont' => $postCont,
                ':postID' => $postID
            ));

            //delete all items with the current postID
            $stmt = $db->prepare('DELETE FROM blog_post_cats WHERE postID = :postID');
            $stmt->execute(array(':postID' => $postID));

            if(is_array($catID)){
                foreach($_POST['catID'] as $catID){
                    $stmt = $db->prepare('INSERT INTO blog_post_cats (postID,catID)VALUES(:postID,:catID)');
                    $stmt->execute(array(
                        ':postID' => $postID,
                        ':catID' => $catID
                    ));
                }
            }

            //redirect to index page
            header('Location: index.php?action=updated');
            exit;

        } catch(PDOException $e) {
            echo $e->getMessage();
        }

    }

}

?>

<?php
//check for any errors
if(isset($error)){
    foreach($error as $error){
        echo $error.'<br />';
    }
}

    try {

        $stmt = $db->prepare('SELECT postID, postTitle, postDesc, postCont FROM blog_posts_seo WHERE postID = :postID') ;
        $stmt->execute(array(':postID' => $_GET['id']));
        $row = $stmt->fetch(); 

    } catch(PDOException $e) {
        echo $e->getMessage();
    }

?>

我的地址是

<?php

//if form has been submitted process it
if(isset($_POST['submit'])){

    //collect form data
    extract($_POST);

    //very basic validation
    if($postTitle ==''){
        $error[] = 'Please enter the title.';
    }

    if($postDesc ==''){
        $error[] = 'Please enter the description.';
    }

    if($postCont ==''){
        $error[] = 'Please enter the content.';
    }

    if(!isset($error)){

        try {

            $postSlug = slug($postTitle);

            //insert into database
            $stmt = $db->prepare('INSERT INTO blog_posts_seo (postTitle,postSlug,postDesc,postCont,postDate) VALUES (:postTitle, :postSlug, :postDesc, :postCont, :postDate)') ;
            $stmt->execute(array(
                ':postTitle' => $postTitle,
                ':postSlug' => $postSlug,
                ':postDesc' => $postDesc,
                ':postCont' => $postCont,
                ':postDate' => date('Y-m-d H:i:s')
            ));
            $postID = $db->lastInsertId();

            //redirect to index page
            header('Location: index.php?action=added');
            exit;

        } catch(PDOException $e) {
            echo $e->getMessage();
        }

    }

}

//check for any errors
if(isset($error)){
    foreach($error as $error){
        echo '<p class="error">'.$error.'</p>';
    }
}
?>

我是否应该检查mysql数据库，或者我的代码中是否有什么东西阻止我的crud在实时环境中工作？
如前所述，xampp上使用的是完全相同的代码（配置文件除外）。