How do I convert a 4-byte number to 16 binary?

I only know the Dechex function, but it turns out to be

echo Dechex (1407401322869);

afa7e975

Calculator Select four bytes out of the results 147afa82c60 is the result I want

How do I use PHP to implement?

Reply to discussion (solution)

What kind of calculator are you?
It should be 147afa7e975.

Echo Base_convert (1407401322869, 10, 16); 147afa7e975

There's something wrong with your calculator.

No, moderator, I just didn't test it.
Test it.

Echo Base_convert (1407401322869, 10, 16); Display is CCCDC8F1EA8?

Thank you for helping me.

The problem is wrong, the result should be 147afa7e975
But I used Base_convert to come out and it turned out to be cccdc8f1ea8.

