How do I convert a string that looks like a hex number to an actual hex number in php?

Question

I have a string that looks like this \"7a\" and I want to convert it to the hex number 7A. I have tried using pack and unpack but that is giving me the hex rep

Answer 1

Probably the simplest way to store that as an integer is hexdec()

$num = hexdec( '7A' );