Check for CMYK images during uploader

I’ve found this code:

$imgDetails = getimagesize('yourimage.jpg');
if ($imgDetails['channels'] === 4) {
    // CMYK
} elseif ($imgDetails['channels'] === 3) {
    // RGB
}

How can I hook this to the uploader? Or other ideas?

@almstudio – Are you using the built-in WordPress uploader and are you using the Settings API to store this information or a different method?

I recommend using the Settings API as it does a lot of stuff for you. (Just Google “wordpress settings api handle file upload” and you should find a bunch in there). However for specifics, whatever ID you give the field that the image is being uploaded from will be used in the $_FILES superglobal to find it.

Like this:

if ( $_FILES['id_of_image'] ) and then you could do your checking of the channels from there.

@praelx
thanx for the answer. And yes, I’m using the built-in uploader. I will google for the settings API, never heard of that or used that before ??

I’ll have a try…

Thanx!