Question

您好我在提交表单之前尝试验证用户是否上传了文件。它只是说每次都没有上传文件。这适用于文本但不适用于文件。

HTML

<li>
            <label for="uthumb">Image of chair 120 x 200:</label>
            <input type="file" name="uthumb"/>
            <div class="errorAdd"><?php echo $errorThumb; ?></div>
            </li>

             <li>
            <label for="uthumb">Large Image of chair 400 x 500:</label>
            <input type="file" name="ulrgthumb"/>
            <div class="errorAdd"><?php echo $errorImg; ?></div>
            </li>

PHP

    $newThumb='';
    $newimg='';    

if(empty($_POST['uthumb'])){
            $all_valid = false;

        $errorThumb = 'We need a thumbnail';

    }else{

        $newThumb=$_POST['uthumb'];
    }
if(empty($_POST['ulrgthumb'])){
            $all_valid = false;

        $errorImg = 'We need a large image';

    }else{

        $newimg=$_POST['ulrgthumb'];
    }


}

Answer 1

您需要使用$ _FILES数组，而不是$ _POST数组：File upload

Answer 2

你想检查

$_FILES

不

$_POST

http://php.net/manual/en/features.file-upload.php

    $newThumb=''; 
$newimg=''; if(empty($_FILES['uthumb'])){ 
     $all_valid = false; 
     $errorThumb = 'We need a thumbnail'; 
}else{ 
     $newThumb=$_FILES['uthumb'];
 } if(empty($_FILES['ulrgthumb'])){ 
     $all_valid = false;
     $errorImg = 'We need a large image'; 
}else{ 
    $newimg=$_FILES['ulrgthumb'];
 }

Answer 3

您甚至可以在输入字段中添加必需项，因此在添加文件

之前无法提交

在这里查看：

http://www.w3schools.com/tags/att_input_required.asp

验证表单提交php上的文件上传

3 个答案: