macfja / math
A set of tools around Mathematics.
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pkg:composer/macfja/math
Suggests
- ext-bcmath: Install BCMath to improve and speed up factorial computation
- ext-gmp: Install GMP to improve and speed up factorial computation
This package is auto-updated.
Last update: 2025-09-17 02:46:58 UTC
README
A set of class and function around Mathematics.
What inside ?
CombinationBuilder
An utility class to create combination. The class also provide a factorial calculation.
Example and Usage
Combination
Get for 3 in 5:
print_r(CombinationBuilder::getCombination(5, 3));
Will output:
Array
(
[1-2-3] => Array
(
[0] => 1
[1] => 2
[2] => 3
)
[1-2-4] => Array
(
[0] => 1
[1] => 2
[2] => 4
)
[1-2-5] => Array
(
[0] => 1
[1] => 2
[2] => 5
)
[1-3-4] => Array
(
[0] => 1
[1] => 3
[2] => 4
)
[1-3-5] => Array
(
[0] => 1
[1] => 3
[2] => 5
)
[1-4-5] => Array
(
[0] => 1
[1] => 4
[2] => 5
)
[2-3-4] => Array
(
[0] => 2
[1] => 3
[2] => 4
)
[2-3-5] => Array
(
[0] => 2
[1] => 3
[2] => 5
)
[2-4-5] => Array
(
[0] => 2
[1] => 4
[2] => 5
)
[3-4-5] => Array
(
[0] => 3
[1] => 4
[2] => 5
)
)
Or in a more compact way:
(1, 2, 3)
(1, 2, 4)
(1, 2, 5)
(1, 3, 4)
(1, 3, 5)
(1, 4, 5)
(2, 3, 4)
(2, 3, 5)
(2, 4, 5)
(3, 4, 5)
Combination Count
Get the number of possible combination
print_r(CombinationBuilder::getCombinationCount(5, 3));
Will output:
10
Factorial
Get the factorial of 5 (5!)
print_r(CombinationBuilder::factorial(5));
Will output:
120