How do I grab last number in a string and add number in PHP

Question

I have number '1 out of 023' i want 023 from string and add plus 1 number in 023 so new number will be 024 and string will be '1 out of 024'

i used following code (stackoverflow)

$text = '1 out of 23';
preg_match('/\d+ out of (\d+)/', $text, $matches);
$lastnum1 = $matches[1];

$text = "1 out of 23";
$words = explode(" ",$text);
$lastnum = (int)array_pop($words);

So you want to grab all numbers out of a string and add them together? Am I right with this? — Rizier123, Feb 16 '15 at 21:40
possible duplicate of [How do I grab last number in a string in PHP?](http://stackoverflow.com/questions/12589519/how-do-i-grab-last-number-in-a-string-in-php) — Rizier123, Feb 16 '15 at 21:42

AbraCadaver · Answer 1 · 2015-02-16T22:16:20.830

1

Just for fun:

$result = array_sum(array_filter(explode(" ", $text), 'is_numeric'));
$text = "1 out of $result";

Based on comment:

$text = '1 out of 23';
$result = array_filter(explode(" ", $text), 'is_numeric');
$text = str_replace($end = end($result), $end+1, $text);

Or:

$text = preg_replace_callback('/[0-9]+$/',
            function ($m) { return ($m[0]+1); }, $text);

edited Feb 16 '15 at 22:16

answered Feb 16 '15 at 21:50

AbraCadaver

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Too bad nobody knows what you are talking about. – AbraCadaver Feb 16 '15 at 21:53
ok i want i have string `$text = '1 out of 23'; preg_match('/\d+ out of (\d+)/', $text, $matches); $lastnum1 = $matches[1]+1;` new number is 24 now i want add updated number into my previous string '1 out of 24' – qmobile bmc Feb 16 '15 at 22:00
@qmobilebmc Last attempt to understand what you want: You want to grab the first and the last number in your string, add them together and updated the string with the new number at the end? (Few examples: `2 out of 10` -> `2 out of 12`; or `1 out of 30` -> `1 out of 31` ?) – Rizier123 Feb 16 '15 at 22:02
@ Rizier123 i want last number from string '1 out of 23 ' last string is 23 .....added +1 in 23 now got 24. at last i want update this number into my string '1 out of 23' (old code) --------------> '1 out of 24' (new updated) – qmobile bmc Feb 16 '15 at 22:07
Not reindexed. Fixed. – AbraCadaver Feb 16 '15 at 22:19

score 1 · Accepted Answer · answered Feb 16 '15 at 22:10

I think this is what you want:

(Here I just use preg_match_all() to get all numbers from your string. After this I use end() to get the last number from the string and then I simply use str_replace() to replace the old number with the incremented one)

<?php

    echo $text = "1 out of 23" . "<br />";
    preg_match_all("!\d+!", $text, $matches);
    $number = end($matches[0]);
    echo $text = str_replace($number, ++$number, $text);

?>

Output:

1 out of 23
1 out of 24

@qmobilebmc You're welcome! But please be more specific next time! (See also: http://stackoverflow.com/help/how-to-ask) — Rizier123, Feb 16 '15 at 22:15

score 0 · Answer 3 · answered Feb 16 '15 at 21:43

You could use an array since it seems like you're looking for the last word and not necessarily the last 3 characters (e.g. what if it were 1 out of 2345).

$text = '1 out of 23';
$highest_number = end(explode(" ",$text));

//If you want to to add 1
$highest_number++;

//Or if you want to create a new variable
$new_highest_number = $highest_number + 1;

How do I grab last number in a string and add number in PHP

3 Answers3