使用PHP上传文件时出错

Question

I am asking the user to upload a file, through the following form making a POST Request to another page Upload.php

<form name="input" action="upload.php" method="post" enctype="multipart/form-data">
    Username: <input type="text" name="username" /><br/>
    <input type="file" name="file" /> <br/>
    <input type="submit" value="Submit" />
</form>

At Upload.php, I use the data filled in the previous form to make an POST Request using Curl function for which I have written the following code:

$data = array(
        "username" => $username,
        "password" => $password,
        "title" => $title,
        "srcfile" => "@".$_FILES['file']['tmp_name']);

$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_URL, $api);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
$response=curl_exec($ch);

echo $response;

This way I am able to upload the file successfully but the file uploaded has a name without any extension which is set by this

$_FILES['file']['tmp_name']

and thus I am not able to use the file on the server.

How should I use the file obtained from the POST Request to make another POST Request?

Thanks in advance.

Answer 1

The problem in the above case is that though we can have the file using $_FILES['file']['tmp_name'], however, the file extension is not the same as that of original file and even the following code does not work which should run as filed in this bug https://bugs.php.net/bug.php?id=48962 in PHP 5.0

"srcfile" => "@".$_FILES['file']['tmp_name'].";filename=".$_FILES['file']['name'].";type=".$_FILES['file']['type']

I have finally used the following solution to solve the above problem:

STEP 1: Save the file sent through the form's POST request in a folder temporarily on the server or your machine.

STEP 2: Now use the path where file has been saved temporarily to make a POST request using CURL for which the code is used same as above mentioned with changes in file location.

"srcfile" => "@".temp_file_path

Answer 2

$_FILE['file']是一个数组，表示SimpleXMLElement属性的complex types 。

Answer 3

You should read the file, encode it and assign the encoded value to the XML element. For example you can use something like:

$xml->file = base64_encode( file_get_contents( $_FILE['file'][ 'tmp_name' ] ) );

Of course in a real code you should add error checking etc.