Extract specific part of a string in PHP

Question

I was simply wondering what would be the simplest and most efficient way of extracting a certain part of a dynamic string in PHP?

Per example, in this string:

<

Answer 1

One of the following:

preg_match('~/[^/]*$~', $str, $matches);
echo $matches[0];

Or:

$parts = explode('/', $str);
echo array_pop($parts);

Or:

echo substr($str, strrpos($str, '/'));