How to reverse this php code "pack("L", 1000);"?

Question

I have a code that look like this:

echo bin2hex( pack( "L", 1000 ) );

Which prints: e8030000

Now, having only e8030000, how can I reverse it back to the int 1000 ?

UPDATE:

found the answer: unpack( "L", ( pack( "H*", 'e8030000' ) ) );

Answer 1

Answer: unpack( "L", ( pack( "H*", 'e8030000' ) ) );