尝试在PHP中的文件不上传的语句 [英] try catch statement in PHP where the file does not upload

问题描述

我明白了try-catch语句的作用，但是从php.net上阅读文档，我无法在我自己的代码中实现一个。我需要一个真实的例子来帮助我理解。

如果上传不成功，我该怎么把这个例子变成一个try catch语句？

$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ _FILES [ '文件'] [ '名']）;

if（！$ move）{
die（'File did not upload'）;
} else {
//打开上传的文件提取
echoUpload Complete！;
}

这可能不是一个很好的例子，但任何帮助将是

解决方案

你可以这样做。

  try {
 //抛出异常，如果不能移动文件
 if（！move_uploaded_file（...））{
 throw new Exception（'Could不移动文件'）; 
} 
 
 //对文件做更多的事情也可能会引发异常
 // ... 
 
 //如果有这里
 echoUpload Complete！; 
} catch（Exception $ e）{
 die（'File not not upload：'。$ e-> getMessage（））; 
} 
  

上面的例子是没有意义的，但你应该得到想法。请注意，您可以从任何地方（例如在使用try {}调用的函数/方法中）抛出异常，并将向上传播。

I understand what try-catch statements do, but from reading the documentation on php.net, I would not be able to implement one into my own code. I need a real example to help me understand.

How can I turn this example into a try catch statement, if the upload was not successful?

$move = move_uploaded_file($_FILES['file']['tmp_name'], $_SERVER['DOCUMENT_ROOT']."/uploads/".$_FILES['file']['name']);

if (!$move) {
    die ('File didn't upload');
} else {            
    //opens the uploaded file for extraction
    echo "Upload Complete!";
}

This may not be a good example to work with, but any help would be appreciated.

解决方案

You could do it like this.

try {
    //throw exception if can't move the file
    if (!move_uploaded_file( ... )) {
        throw new Exception('Could not move file');
    }

    //do some more things with the file which may also throw an exception
    //...

    //ok if got here
    echo "Upload Complete!";
} catch (Exception $e) {
    die ('File did not upload: ' . $e->getMessage());
}

It is a bit pointless for the above example, but you should get the idea. Note that you can throw the exception(s) from anywhere (e.g. within a function/method that you call from withing the try{}) and they will propagate upwards.

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