PHP code example of nivshah / simplex-calculator

1. Go to this page and download the library: Download nivshah/simplex-calculator library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

nivshah / simplex-calculator example snippets


// using Composer
download


// define task: Maximize x1 + 2x2
$task = new Simplex\Task(new Simplex\Func(array(
	'x1' => 1,
	'x2' => 2,
)));

// add constraints

// 3x1 + 2x2 <= 24
$task->addRestriction(new Simplex\Restriction(array(
	'x1' => 3,
	'x2' => 2,

), Simplex\Restriction::TYPE_LOE, 24));

// -2x1 - 4x2 >= -32
$task->addRestriction(new Simplex\Restriction(array(
	'x1' => -2,
	'x2' => -4,

), Simplex\Restriction::TYPE_GOE, -32));

// create solver
$solver = new Simplex\Solver($task);

// get solutions
$solution = $solver->getSolution(); // array('x1' => 0, 'x2' => 8, 'x3' => 8, 'x4' => 0)
$alternativeSolutions = $solver->getAlternativeSolution(); // array(array('x1' => 4, 'x2' => 6, 'x3' => 0, 'x4' => 0))

// get optimal value
$optimum = $solver->getSolutionValue($solution); // 16

// print solutions
$printer = new Simplex\Printer;
$printer->printSolution($solver);

// or print the whole solution process
$printer->printSolver($solver);


$solver = new Simplex\Solver($task, 32);