PHP无法上载多个图像

我有一个表单，我想在其中最多上传五个图像。图像的名称和扩展名应该插入数据库表"images"中，然后上传到_uploads/name_of_The_album/目录。

问题是，当我选择一些图像并点击上传时，只有第一个图像上传正确，其他图像都失败了。

这是我的代码：

if(isset($_FILES['image']) === true){
    $files = $_FILES['image'];
    $allowed_ext = array('jpg', 'jpeg', 'png', 'gif');
    $album_id = (int)$_GET['album_id'];
    $album_name = $_GET['album_name'];
    for($i=0; $i<count($files['name']); $i++){
        $name = $files['name'][$i];
        $tmp_name = $files['tmp_name'][$i];
        $size = $files['size'][$i];
        $ext = explode('.', $files['name'][$i]);
        $ext = strtolower(end($ext));
        $img_name = explode('.', $files['name'][$i]);
        $img_name = strtolower(current($img_name));
                    //do some testing echos to see the result
        //echo $img_name."<br>";
                     //here i'm going to add some validation as soon as
                     // i fix the multi-upload problem
        //insert image into database
        $query_insert_image = "INSERT INTO `images` (album_id, image_name, image_ext) VALUES ({$album_id}, '{$img_name}', '{$ext}') ";
        $insert_image = mysql_query($query_insert_image, $connection) or die(mysql_error());
        if(mysql_affected_rows() == 1){
            move_uploaded_file($tmp_name, '../_uploads/'.$album_name.'/'.$name);
        }
        //redirect
        redirect_to("view_album.php?succeed=1");
    }//end the for loop
    //echo '<pre>',print_r($files, true),'</pre>';
}

下面是表单的一些代码：

<form action="" method="post" enctype="multipart/form-data" name="formUploadImages" id="formUploadImages">
    <p>
        <label for="image">Choose one or more Image(s):</label><br />
        <input type="file" name="image[]" id="image" /><br />
        <input type="file" name="image[]" id="image" /><br />
        <input type="file" name="image[]" id="image" /><br />
        <input type="file" name="image[]" id="image" /><br />
        <input type="file" name="image[]" id="image" />
    </p>
......

你知道我做错了什么吗？