how to make long numbers have no exponential?

Gary_King

for instance, long numbers show up as 7.0091770359131E+027
but how can I make it show the entire number instead?

Thanks in advance!

sidney

$int=21474836481111115;

echo number_format($int,0,".",'');

//or

printf('%.0f',$int);

number_format()
sprintf()

there will be some convertion error tho

Gary_King

so I basically cannot get the final numbers? they all show up as zeroes

sidney

take alook at the precision maths functions
http://uk2.php.net/manual/en/ref.bc.php

you will have to use it to do all calcs and not get conversion errors

Weedpacket

As sidney said; the bcmath functions provide arbitrary precision. However, you'll be needing to store your numbers as strings of digits; as soon as you cast them into any numeric type that doesn't have sufficient precision you'll lose the less-significant digits. (Now matter how you cut it, you can only store a finite selection of numbers in 64 bits!)

To use sidney's earlier example:

$int='21474836481111115';

will work in bcmath functions, but

$int=21474836481111115;

will get converted to floating-point immediately and you'll have lost precision before it's even got to the functions.