Question

Is it possible to check if two picture are identical with php?

(I want to check if a picture of an event from facebook is the dafault, or not)

Thanks, John

Answer 1

I’d use a hashing algorithm and compare the two hashes:

if ( sha1_file ( $file1 ) === sha1_file ( $file2 ) ) {
  // They're identical
} else {
  // They're not
}

This uses sha1_file, but you could use any hashing algorithm.. MD5 for instance