How to multiplicate 2 numbers in one string with 3rd outside the string in PHP?

Question

I want to calculate strings with formula which is outside of the string, some times i get strings with two numbers separated by space and my formula just calculate the first number from the string.

$string = "225cm x 70cm";

$outputString = preg_replace('/[^0-9]/ ', ' ', $string);// output here is string(12) "225 70 "  

$inches = intval($outputString) * 0.39370; 
$inches_pre = round($inches  / 0.5) * 0.5; // output here is just 85 instead of string "85.5 27.5"

Answer 1

You can use

$string = "225cm x 70cm";
if (preg_match_all('/\d+(?:\.\d+)?/', $string, $m)) {
    $inches = implode(" ", array_map(function ($x) { return round(intval($x) * 0.39370  / 0.5) * 0.5; }, $m[0]));
    echo $inches;
}
// => 85.5 27.5

See the PHP demo .

With preg_match_all('/\d+(?:\.\d+)?/', $string, $m) , you extract all numbers into $m[0] , and then you process each inside an array_map and then join the results into a single string with implode .