regex - extract last group of numbers in a string

[markjohnson]

Hi,

 

I have:

 

$string="this-is-my-uri--8271";

 

How can extract just the last group of numbers at the end, i.e. 8271?

 

Thanks

[nrg_alpha]

One way could be:

 

$string="this-is-my-uri--8271";
preg_match('#[0-9]+$#', $string, $match);
echo $match[0]; // Output: 8271

 

If it will always be certain to have 4 digits at the end, another possible solution could involve the use  of substr:

 

$numbers = substr($string, -4, 4);

 

Depending on the circumstances, regex may not be needed.

[.josh]

ugh. beat me to it. 

 

you know nrg, i don't know if it's a good sign or a bad sign that our regex solutions usually always come out almost exactly the same.  Well this is a simple example. Kind of hard to not come out the same.  But i've noticed on more complex examples the same thing.  Except you're partial to # I'm partial to ~

 

[nrg_alpha]

CV, we both are pretty sound / comfortable with regex, so if our solutions are similar, I'm hoping that's a good sign (if not, then we're both more off base than we thought)

[markjohnson]

Thanks! It did the trick.

 

One way could be:

 

$string="this-is-my-uri--8271";
preg_match('#[0-9]+$#', $string, $match);
echo $match[0]; // Output: 8271

 

If it will always be certain to have 4 digits at the end, another possible solution could involve the use  of substr:

 

$numbers = substr($string, -4, 4);

 

Depending on the circumstances, regex may not be needed.

[nrg_alpha]

Glad to hear. You can flag this thread as solved.