PHP : binary image data, checking the image type

Question

I have some images in bin, I want to check the header to check the format (jpg, png, etc)

I don't want to use temp files! I have a solution using TEMP FILES.

Answer 1

I can see that most of you didn't understand the question :) (question was how to validate binary data in buffer, not a file on disk).

I had same problem, and resolved it with:

$finfo = new finfo(FILEINFO_MIME_TYPE);
$mimeType = $finfo->buffer($rawImage);