Question

I like to convert string with a price to a float value. The price comes from different languages and countries and can look like this:

 1,00 €
 € 1.00
 1'000,00 EUR
 1 000.00$
 1,000.00$
 1.000,00 EURO

or whatever you can think of…

Not sure I got the full range of possibilities with my examples. I am also not sure if it is possible to make in international convert blindly, maybe I have to use a language code? So for the start Euro and Dollar would be enough.

floatval() is kind of stupid so I need something more here. I think I should first remove all chars beside numbers, , and .. Then fix the , / . and use floatval finally.

Has someone done this before and can help me a little?

I would prefer a solution without regexp 😉

Update: Current solution with tests https://onlinephp.io/c/9e95e

Answer 1

Ok, I tried it myself. What do you think of this?

function priceToFloat($s){
    // is negative number
    $neg = strpos((string)$s, '-') !== false;
    
    // convert "," to "."
    $s = str_replace(',', '.', $s);

    // remove everything except numbers and dot "."
    $s = preg_replace("/[^0-9\.]/", "", $s);

    // remove all seperators from first part and keep the end
    $s = str_replace('.', '',substr($s, 0, -3)) . substr($s, -3);

    // Set negative number
    if( $neg ) {
        $s = '-' . $s;
    }

    // return float
    return (float) $s;
}

Here some tests: https://onlinephp.io/c/9e95e

Sorry. I couldn’t include the other functions because codepad did not like them. But I compared them and there was trouble with strings like "22 000,76" or "22.000"

Update: As Limitless isa pointed out you might have a look at the build in function money-format.