Split a number by decimal point in php

Question

How do I split a number by the decimal point in php?

I've got $num = 15/4; which turns $num into 3.75. I would like to split out the 3 and the 75 parts, so $int = 3 and $dec = 75. My non-working code is:

$num = 15/4; // or $num = 3.75;
list($int, $dec) = split('.', $num);

but that results in empty $int and $dec.

Thanks in advance.

Answer 1

If you explode the decimal representation of the number, you lose precision. If you don't mind, so be it (that's ok for textual representation). Take the locale into account! We Belgians use a comma (at least the non-programming ones :).

If you do mind (for computations e.g.), you can use the floor function:

$num = 15/4
$intpart = floor( $num )    // results in 3
$fraction = $num - $intpart // results in 0.75

Note: this is for positive numbers. For negative numbers you can invert the sign, use the positive approach, and reinvert the sign of the int part.

Answer 2

Try explode

list($int,$dec)=explode('.', $num);

as you don't really need to use a regex based split. Split wasn't working for you as a '.' character would need escaping to provide a literal match.

Answer 3

$num = 15/4; // or $num = 3.75;
list($int, $dec) = explode('.', $num);

Answer 4

$int = $num > 0 ? floor($num) : ceil($num);
$dec = $num - $int;

If you want $dec to be positive when $num is negative (like the other answers) you could do:

$dec = abs($num - $int);

Answer 5

$num = 3.75;
$fraction = $num - (int) $num;

Answer 6

$num = 15/4;
substr(strrchr($num, "."), 1)

Answer 7

In case when you don't want to lose precision, you can use these:

$number = 10.10;
$number = number_format($number, 2, ".", ",");
sscanf($number, '%d.%d', $whole, $fraction);

// you will get $whole = 10, $fraction = 10

Answer 8

This works for positive AND negative numbers:

$num = 5.7;
$whole = (int) $num;         //  5
$frac  = $num - (int) $num;  // .7