Reformat number inside array of string PHP

Question

I have an array which contains strings like this:

$items = array(
  "Receive 10010 from John",
  "Send 1503000 to Jane",
  "Receive 589 from Andy",
  "Send 3454 to Mary"
);

i want to reformat the number inside this array so it will become like this:

$items = array(
  "Receive 10.010 from John",
  "Send 1.503.000 to Jane",
  "Receive 589 from Andy",
  "Send 3.454 to Mary"
);

if i use number_format function it will look like this with number varibale:

$number = '412223';
number_format($number,0,',','.');
echo $number; //412.223

Answer 1

You can use preg_replace_callback to match a number inside a string and apply some custom formatting. For a single string, this would look like this:

$string = "Receive 10010 from John";

$formatted = preg_replace_callback( "/[0-9]+/", function ($matches) {
    return number_format($matches[0], 0, ',', '.');
}, $string);

echo $formatted;

Receive 10.010 from John

---

If you want to apply the same logic to your entire array, you can wrap the above in a call to array_map:

$formatted = array_map(function ($string) {
    return preg_replace_callback( "/[0-9]+/", function ($matches) {
        return number_format($matches[0], 0, ',', '.');
    }, $string);
}, $items);

print_r($formatted);

Array
(
  [0] => Receive 10.010 from John
  [1] => Send 1.503.000 to Jane
  [2] => Receive 589 from Andy
  [3] => Send 3.454 to Mary
)

Answer 2

There you go

Follow the following steps

1. Run through the loop using foreach
2. Extract the numbers using preg_match_all('!\d+!', $str, $matches);
3. Apply number format number_format($matches[0],0,',','.');
4. update array items

So the whole story is to use preg_match_all('!\d+!', $str, $matches); and extract the string number.

Answer 3

If you don't expect decimal numbers, you could also use something like

$items = preg_replace('/\d\K(?=(?:\d{3})+\b)/', ".", $items);

• \d is a shorthand for digit [0-9]
• \K resets beginning of the reported match
• after every digit the lookahead (?=(?:\d{3})+\b) checks if there are multiples of three digits ahead until the next word boundary (end of the number).

See regex demo at regex101 or php demo at eval.in