Unable to read/open uploaded JPEG files from digital camera

[scooter41]

Hi there,

 

A client of mine takes his photos straight off his camera and uses our image uploader to add product shots to his website.

 

The script we use normally works without any problems, however his images seem to be causing the script to fall over, saying it cant open the jpeg file.

 

Im using the function as follows:

 

function open_image ($file) {

        # JPEG:

        $im = @imagecreatefromjpeg($file);

        if ($im !== false) { return $im; }

        # GIF:

        $im = @imagecreatefromgif($file);

        if ($im !== false) { return $im; }

        # PNG:

        $im = @imagecreatefrompng($file);

        if ($im !== false) { return $im; }

        # WBMP:

        $im = @imagecreatefromwbmp($file);

        if ($im !== false) { return $im; }

      # Try and load from string:

        $im = @imagecreatefromstring(file_get_contents($file));

        if ($im !== false) { return $im; }

        return false;

}

 

Where none of the options works, and it fails saying unable to open image.

 

Could it be something to do with the exif data that is present in jpegs straight from the camera?

 

I have tried options my end, such as cmyk instead of RGB, and 300dpi instead of 72dpi, but they all work fine and I am unable to recreate the error, so I am almost working blind.

 

Appreciate any suggestions anyone has!!

 

Thanks in advance

[BlueSkyIS]

i suggest that you use getimagesize() to check the type of the image first, then process it accordingly; vs. imagecreatefromxxx multiple times to see if it works.

[The Little Guy]

an even better way, would be to check what the header type is:

 

$filename = 'images/myimage.jpg';
$finfo = finfo_open(FILEINFO_MIME); // return mime type ala mimetype extension
if(finfo_file($finfo, $filename) == 'image/jpeg'){
     return TRUE;
}else{
     return FALSE;
}

[PFMaBiSmAd]

Do you have any error checking in your uploaded code so that you know the file was uploaded successfully? Does the $file parameter contain anything?