Splitting strings in PHP and get last part

Question

I need to split a string in PHP by \"-\" and get the last part.

So from this:

abc-123-xyz-789

I expect to get

Answer 1

As has been mentioned by others, if you don't assign the result of explode() to a variable, you get the message:

E_STRICT: Strict standards: Only variables should be passed by reference

The correct way is:

$words = explode('-', 'hello-world-123');
$id = array_pop($words); // 123
$slug = implode('-', $words); // hello-world