Question

Let me first start by saying I don’t understand Reg-Ex much so I’m hoping someone can help me.

I have a string such as “/1/3” or maybe “/1/34/2/6” and I am trying to get the last number after the final /

A friend sent me this formula but all it give me is the last /

preg_replace('~^/([0-9]+)(/.*)?$~', '$1', $cat['path']);

Where $cat[path] is the string I’ve got. How should I change this to give me the final number and not the slash /?

Answer 1

You want:

#/(\d+)$#

where # are the delimiters. It means,

/      a slash,
\d+    a sequence of one or more digits,
$      then the end.

The parentheses mean that you want the sequence to be captured.

The PHP code would be:

$string = "1/12/26";

if (preg_match('#/(\d+)$#', $string, $results))
{
    $number = $results[1]; // [0] holds the whole string
    print "The last number is $number.";
}