PHP create image from application/octet stream

My application 开发者_Go百科is having images sent to it from mobile devices with the content-type "application/octet-stream".

I need to process these images using the GD library, which means I need to be able to create an image object from the data.

Typically, I have been using imagecreatefromjpeg, imagecreatefrompng, imagecreatefromgif, etc, to handle files uploaded from web forms, but these don't seem to work when coming to me as application/octet-stream.

Any ideas on how I can achieve my goal?

EDIT

Here is the code I use to create the image identifier...my handler works perfectly throughout my site, the only difference I can tell between my site and the data from the iOS is the content-type

public function open_image($path) {
        # JPEG:
        $im = @imagecreatefromjpeg($path);
        if ($im !== false) { $this->image = $im; return $im; }

        # GIF:
        $im = @imagecreatefromgif($path);
        if ($im !== false) { $this->image = $im; return $im; }

        # PNG:
        $im = @imagecreatefrompng($path);
        if ($im !== false) { $this->image = $im; return $im; }

        $this->error_messages[] = "Please make sure the image is a jpeg, a png, or a gif.";
        return false;
    }

Easy :)

$image = imagecreatefromstring( $data );

Specifically:

$data = file_get_contents($_FILES['myphoto']['tmp_name']);
$image = imagecreatefromstring( $data );

I found this in the codeigniter forum a way to change the mime and it works, I suppose you can use for other frameworks as well, this is the link and this the code:

//if mime type is application/octet-stream (psp gives jpegs that type) try to find a   more specific mime type

$mimetype = strtolower(preg_replace("/^(.+?);.*$/", "\\1", $_FILES['form_field']  ['type'])); //reg exp copied from CIs Upload.php

if($mimetype == 'application/octet-stream'){
    $finfo = finfo_open(FILEINFO_MIME, '/usr/share/file/magic');
    if($finfo){
    $_FILES['form_field']['type'] = finfo_file($finfo, $_FILES['form_field']['tmp_name']);
    finfo_close($finfo);
    }
    else echo "finfo_open() returned false");
}  

Fileinfo extension needs to be installed on the server.

It worked for me.

you can use this function too. it not require any other dependency. and work perfectly for other types also.

function _getmime($file){
    if($info = @getimagesize($file)) {
        return image_type_to_mime_type($info[2]);
    } else {
        return mime_content_type($file);
    }
}