输入文件空处理

时间:2014-09-27 16:13:23

标签: php html forms

所以,我有一个表格,它是文章形式,其中有标题,内容,图像(用于通过使用javascript从输入显示所选图像)和输入(选择图像),我使用

$upload_errors = array(
    // http://www.php.net/manual/en/features.file-upload.errors.php
    UPLOAD_ERR_OK               => "No errors.",
    UPLOAD_ERR_INI_SIZE     => "Larger than upload_max_filesize.",
  UPLOAD_ERR_FORM_SIZE  => "Larger than form MAX_FILE_SIZE.",
  UPLOAD_ERR_PARTIAL        => "Partial upload.",
  UPLOAD_ERR_NO_FILE        => "No file.",
  UPLOAD_ERR_NO_TMP_DIR => "No temporary directory.",
  UPLOAD_ERR_CANT_WRITE => "Can't write to disk.",
  UPLOAD_ERR_EXTENSION  => "File upload stopped by extension."
);

检查我的输入文件是否有错误,并且可以正常添加新文章...

但是,如果我想编辑我的文章怎么办?通常我会重复使用相同的表格,但回显所选的文章值和所有显示,它显示标题,内容,图像,但没有输入文件,我知道这是安全问题,所以例如我只想更改文章标题,我因为我提交了包括输入文件在内的所有表单内容,所以会收到错误“没有文件”...那么这种问题是否有最佳实践?也许某种方式来识别如果我没有选择任何图像,那么我将通过它而不显示任何错误......

以下是我如何处理错误

$error = $_FILES['upload_file']['error'];
if ($error != 1) {
    $information->id = $_POST['id'];  
    $information->name = $_POST['name'];
    $name = $_POST['name'];
    $information->upload_image($_FILES['upload_file']['tmp_name']);

    $content = $_POST['content'];
    $entity_content = htmlentities($content);
    $entity_content = stripslashes(str_replace('\r\n', '',$entity_content));
    $information->content = $entity_content;
    try{
        if($information->save()){
            if(isset($_POST['simpan'])){
                redirect_to("show_information.php");
            }
        }else{
            $message = "failed to change information";
        }
    }catch(PDOException $e){
        $message = "failed to change information";
        error_notice($e);
    } 
}else{
    $message = $upload_errors[$error];
}

那么如果没有输入,我还需要绕过错误检查?

1 个答案:

答案 0 :(得分:0)

所以我只是为此获得最佳解决方案....实际上非常容易

$error = $_FILES['upload_file']['error']; 
if ($error == 0 || $error == 4) {
     if($error != 4)
     //do the uploading
}

在我的上传/保存课程中我只需要检查

if(!empty($image))
   // do move_uploaded_to 
   // do the saving with replacement of $image
else
   // do the saving without $image

$ image只是我的占位符,用于将图像名称/路径放到mysql数据库