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PHP Decimal Type implementation
A value object class that utilizes BCMath functions to perform arbitrary precision arithmetic operations., (*1)
The following operations are currently supported: 1. Addition 1. Subtraction 1. Multiplication 1. Division, (*2)
Source, (*3)
$termOne = new Decimal('2', 2);
$termTwo = new Decimal('3', 0);
var_dump($termOne->add($termTwo)->getValue());
var_dump($termOne->subtract($termTwo)->getValue());
var_dump($termOne->multiply($termTwo)->getValue());
var_dump($termOne->divide($termTwo)->getValue());
// refer to Mixed Precision Calculations section
var_dump($termTwo->add($termOne)->getValue());
var_dump($termTwo->subtract($termOne)->getValue());
var_dump($termTwo->multiply($termOne)->getValue());
var_dump($termTwo->divide($termOne)->getValue());
Output, (*4)
string(4) "5.00" string(4) "-1.00" string(4) "6.00" string(4) "0.66" string(4) "5" string(4) "1" string(4) "6" string(4) "2"
If the precision is not explicitly set, the precision required to represent the value will be automatically calculated., (*5)
Source, (*6)
$decimal = new Decimal('3.14159');
var_dump($decimal->getPrecision());
Output, (*7)
int(5)
Rounding is performed using the half away from zero method., (*8)
Source, (*9)
$termOne = new Decimal('1');
$termTwo = new Decimal('1.5');
$product = $termOne->multiply($termTwo);
var_dump($product->getValue());
Output, (*10)
string(1) "2"
Source, (*11)
$termOne = new Decimal('-1');
$termTwo = new Decimal('1.5');
$product = $termOne->multiply($termTwo);
var_dump($product->getValue());
Output, (*12)
string(1) "-2"
If a precision is explicitly specified and the value specified requires more precision than specified, the value will be rounded to the specified precision., (*13)
Source, (*14)
$decimal = new Decimal('3.14159', 3);
var_dump($decimal->getValue());
Output, (*15)
string(5) "3.142"
Calculations are performed internally at the maximum precision of either term + 1 and then rounded to the precision of the first term., (*16)
So, in the following example:, (*17)
19.99 x 0.07125
The internal result is:, (*18)
1.424287
And the output is rounded to the precision of the first term (19.99 => 2) to produce:, (*19)
1.42
Source, (*20)
$price = new Decimal('19.99', 2);
$taxRate = new Decimal('0.07125', 5');
$tax = $price->multiply($taxRate);
var_dump($tax);
Output, (*21)
string(4) "1.42"
PHP Decimal Type implementation
BSD-3-Clause
PHP Decimal Type implementation
BSD-3-Clause
PHP Decimal Type implementation
BSD-3-Clause