PHP split string before and after the integer inside

I have a string like this:

some address number 23 neighborhood city

Now, my goal is to separate it in two parts:

1. some address number 23

2. neighborhood city

I am guessing this will require a combination of the split or preg_replace commands using something like this /[^0-9]/. No matter how I tried, I did not get the desired result.

Edit: There is 2 absolute correct answers, One using preg_replace and the another one preg_split, Good luck !

Answer

You can use preg_split() with flags (PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY)

<?php
$word= "some address number 23 neighborhood city";
$keywords = preg_split("/(.+[0-9]+)(.+)/", $word,-1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
print_r($keywords);

Output:-https://eval.in/1006421

Explanation:-

/(.+[0-9]+)(.+)/

    1st Capturing Group (.+[0-9]+)

        .+ matches any character (except for line terminators)
            + Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)

        Match a single character present in the list below [0-9]+

            + Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)
            0-9 a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive)

    2nd Capturing Group (.+)
        .+ matches any character (except for line terminators)
        + Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)