用逗号代替点的十进制数（php和sql）

Question

I'm doing a little application of adding prices and decimals. Points are normal to use with decimals, but how can I write decimal number with comma as input (543,35 instead of 543.35) and then maybe change it with point to the database (mysql)? Then print it back form the database with the comma. Reason is that comma (,) is more used in Finland than point (.) when write decimal numbers.

Thank you very much!

Samuel

Answer 1

$input  = '5,50';
$output = str_replace(',', '.', $input);
var_dump($output); // string(4) "5.50"
$number = (float)$output;
var_dump($number); // float(5.5)

Answer 2

you need not do anything in the sql end. you want to format the decimal value in php (this assumes php4/php5): Set the third parameter $dec_point to ','

// string number_format ( float $number , int $decimals , string $dec_point , string $thousands_sep )
<?php

$number = 1234.56;

// French notation
$nombre_format_francais = number_format($number, 2, ',', ' ');
// 1 234,56

$number = 1234.5678;

// english notation without thousands seperator
$english_format_number = number_format($number, 2, '.', '');
// 1234.57

?>

source: http://php.net/manual/en/function.number-format.php

Cheers!

Answer 3

the PHP number_format function is what you need :

number_format(5.50, 2, ',');

...should do the trick.

Answer 4

As it's been said, it's best to save the value as a float and then format for display. As an alternative to the previously suggested number_format(), you could try money_format() http://us.php.net/manual/en/function.money-format.php It doesn't work in a windows environment though if that is important to you.

Answer 5

No, using comma as a decimal separator for arithmetic operations is not supported. Filter your input and replace the comma with a period, then format your output as you wish.