How to convert string to number in php without rounding?

Question

I am retrieving some values stored as string which have up to 15 decimal places. I need to json_encode it and pass it on to javascript as numeric value. So I tried (float)$number , but the number gets rounded-off in this approach. How else can I convert it to number without any rounding?

Answer 1

You should use the GMP library in PHP whenever number precision is important. You may have to enable it inside of your php.ini settings. Search for...

;extension=php_gmp.dll

and change it to

extension=php_gmp.dll

and then you'll be able to use the GMP objects.

Answer 2

If you want to preserve those decimals: don't parse it. Any number converted to float is subject to precision loss . Can't you just print the variable as received in JS?