Splitting strings in PHP and get last part

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

"789"

This is the code I've come up with:

substr(strrchr($urlId, '-'), 1)

which works fine, except:

If my input string does not contain any "-", I must get the whole string, like from:

123

I need to get back

123

and it needs to be as fast as possible.

• split($pattern,$string) split strings within a given pattern or regex (it's deprecated since 5.3.0)
• preg_split($pattern,$string) split strings within a given regex pattern
• explode($pattern,$string) split strings within a given pattern
• end($arr) get last array element

So:

end(split('-',$str))

end(preg_split('/-/',$str))

$strArray = explode('-',$str)
$lastElement = end($strArray)

Will return the last element of a - separated string.

And there's a hardcore way to do this:

$str = '1-2-3-4-5';
echo substr($str, strrpos($str, '-') + 1);
//      |            '--- get the last position of '-' and add 1(if don't substr will get '-' too)
//      '----- get the last piece of string after the last occurrence of '-'

$string = 'abc-123-xyz-789';
$exploded = explode('-', $string);
echo end($exploded);

This does not have the E_STRICT issue.