Convert double to string in php

Question

I've a simple question.

I've this 7310093341976450848 number which I needed to echo.But when I echo it gives me this 7.3100933419765E+18.

I tried

echo (string)$data;

to cast it to string and then print it but it's still giving the same result.

The number is initially of type double.

Answer 1

I've this 7310093341976450848 number which I needed to echo.
The number is initially of type double.

Because of the floating point representation used in PHP, once it's stored as a double, you cannot print out that exact number anymore.

This is one of the (many) ways to print out the value:

printf("%.0f", $data);
echo number_format($data, 0, '', '');

If you don't want to lose precision, store it as a string, or use one of the arbitrary precision libraries: BC Math / GMP.