PHP multipart form data PUT request?

Question

I\'m writing a RESTful API. I\'m having trouble with uploading images using the different verbs.

Consider:

I have an object which can be created/modified/del

Answer 1

First of all, $_FILES is not populated when handling PUT requests. It is only populated by PHP when handling POST requests.

You need to parse it manually. That goes for "regular" fields as well:

// Fetch content and determine boundary
$raw_data = file_get_contents('php://input');
$boundary = substr($raw_data, 0, strpos($raw_data, "\r\n"));

// Fetch each part
$parts = array_slice(explode($boundary, $raw_data), 1);
$data = array();

foreach ($parts as $part) {
    // If this is the last part, break
    if ($part == "--\r\n") break; 

    // Separate content from headers
    $part = ltrim($part, "\r\n");
    list($raw_headers, $body) = explode("\r\n\r\n", $part, 2);

    // Parse the headers list
    $raw_headers = explode("\r\n", $raw_headers);
    $headers = array();
    foreach ($raw_headers as $header) {
        list($name, $value) = explode(':', $header);
        $headers[strtolower($name)] = ltrim($value, ' '); 
    } 

    // Parse the Content-Disposition to get the field name, etc.
    if (isset($headers['content-disposition'])) {
        $filename = null;
        preg_match(
            '/^(.+); *name="([^"]+)"(; *filename="([^"]+)")?/', 
            $headers['content-disposition'], 
            $matches
        );
        list(, $type, $name) = $matches;
        isset($matches[4]) and $filename = $matches[4]; 

        // handle your fields here
        switch ($name) {
            // this is a file upload
            case 'userfile':
                 file_put_contents($filename, $body);
                 break;

            // default for all other files is to populate $data
            default: 
                 $data[$name] = substr($body, 0, strlen($body) - 2);
                 break;
        } 
    }

}

At each iteration, the $data array will be populated with your parameters, and the $headers array will be populated with the headers for each part (e.g.: Content-Type, etc.), and $filename will contain the original filename, if supplied in the request and is applicable to the field.

Take note the above will only work for multipart content types. Make sure to check the request Content-Type header before using the above to parse the body.