表中的文件类型输入值

我得到了编辑页面，在那里我可以添加图像。

<div class="element">
<label for="attach">Attachments <span>(optional)</span></label>
<input type="file" id="img" name="img"/>
</div>

这是我添加图像的输入，我的代码从中获取图像名称并插入行（这就是我称之为$result['img']的方式）。

但是当我再次编辑页面并保存它时，图像行中的值正在删除，因为输入在上面没有值。我如何设置它的值，这样它就不会在每次编辑时删除。

edit.php

<?php
                        while($edit = mysql_fetch_array($query_edit)){
                            print "
                            <h2>".$edit['lang']." - ".$edit['title']."</h2>
                    <div class='"entry'">
                        <div class='"sep'"></div>
                    </div>
                            <form action='"/admin/save'" method='"post'" ENCTYPE='"multipart/form-data'">
                            <div class='"element'">
                        <label for='"name'">Page ID <span class='"red'">(required)</span></label>
                        <input id='"id'" name='"id'" value=".$edit['id']." class='"text'" />
                    </div>
                    <div class='"element'">
                        <label for='"name'">Page title <span class='"red'">(required)</span></label>
                        <input id='"title'" name='"title'" value=".$edit['title']." class='"text'" />
                    </div>
                    <div class='"element'">
                        <label for='"category'">Category <span class='"red'">(required)</span></label>
                        <input id='"category'" name='"category'" value=".$edit['category']." class='"text'" />
                    </div>
                    <div class='"element'">
                        <label for='"category'">Sub-Category <span class='"red'">(required)</span></label>
                        <input id='"sub_category'" name='"sub_category'" value=".$edit['sub_category']." class='"text'" />
                    </div>
                    <div class='"element'">
                        <label for='"category'">News-Category <span class='"red'">(required)</span></label>
                        <input id='"news_category'" name='"news_category'" value=".$edit['news_category']." class='"text'" />
                    </div>
                    <div class='"element'">
                        <label for='"img'">Attachments <span>(optional)</span></label>
                        <input type='"file'" id='"img'" name='"img'"/><br><br>
                        <img src='/views/admin/uploads/".$edit['img']."' title='no image'/>
                    </div>";
                    if($edit['short_content'] == ''){}
                    else {
                    print"
                    <div class='"element'">
                        <label for='"short-content'">Short content <span>(optional)</span></label>
                        <textarea name='"short_content'" id='"short_content'" class='"textarea'" rows='"10'">".$edit['short_content']."</textarea>
                    </div>
                    ";
                    }
                    print "
                    <div class='"element'">
                        <label for='"content'">Long content <span>(optional)</span></label>
                        <textarea name='"long_content'" id='"long_content'" class='"textarea'" rows='"10'">".$edit['content']."</textarea>
                    </div>
                    <div class='"element'">
                        <label for='"date'">Date <span class='"red'">(required)</span></label>
                        <input id='"date'" name='"date'" class='"text'" value=".$edit['date']." />
                    </div>
                    <div class='"element'">
                        <label for='"language'">Language <span class='"red'">(required)</span></label>
                        <input id='"language'" name='"language'" value=".$edit['lang']." class='"text'" />
                    </div>
                    <div class='"entry'">
                        <button type='"submit'" id='"button-save'" class='"add button-save'">Save page</button>
                    </div>
                </form>
                            ";
                        }
                    ?>

save.php

    <?php 
                    $id = $_POST['id'];
                    $category = $_POST['category'];
                    $sub_category = $_POST['sub_category'];
                    $news_category = $_POST['news_category'];
                    $title = $_POST['title'];
                    $short_content = $_POST['short_content'];
                    $long_content = $_POST['long_content'];
                    $date = $_POST['date'];
                    $lang = $_POST['language'];
                    //echo $id." ".$category." ".$title." ".$short_content." ".$lang." ".$date." ".$sub_category;
                    $errors = array();
                    if(empty($id)){
                        $errors[] = "Please fill ID";
                    }
                    if(empty($category)){
                        $errors[] = "Please fill Category";
                    }
                    if(empty($sub_category)){
                        $errors[] = "Please fill Sub-Category";
                    }

                    if(empty($news_category)){
                        $errors[] = "Please fill News-Category";
                    }

                    if(empty($title)){
                        $errors[] = "Please fill Title";
                    }
                    if(empty($date)){
                        $errors[] = "Please fill Date";
                    }
                    if(empty($lang)){
                        $errors[] = "Please fill Lang";
                    }
                    if(!empty($_FILES['img']['name'])){
                        $extension = end(explode(".",$_FILES['img']['name']));
                        $name = $_FILES['img']['name'];
                        $size = $_FILES['img']['size'];
                        if(file_exists("views/admin/uploads/".$name)){
                            $errors[] = "File with this name already exists!";
                        }
                        if($extension != "jpg" && $extension != "png" && $extension != "gif" && $extension != "JPG"){
                            $errors[] = "Unknown file format!";
                        }
                    }
                    if(count($errors)==0){
                        $query = mysql_query("UPDATE `$category` SET `category`='$category',`sub_category`='$sub_category',`news_category`='$news_category',`title`='$title',`img`='$name',`short_content`='$short_content',`content`='$long_content',`date`='$date',`lang`='$lang' WHERE `id`='$id'");
                        move_uploaded_file($_FILES['img']['tmp_name'],"views/admin/uploads/".$name);
                        echo "<h2 align='"center'">Successfully updated!</h2>";
                    }
                    else{
                        print "<h3>Errors!</h3><ul><li>".join("</li><li>",$errors)."</li></ul>";
                    }
?>