/**
* @dataProvider rootProvider
**/
public function testRoot($ex, $a, $b, $d)
{
$equation = new QuadraticRoots();
$this->assertEquals($ex, $equation->roots($a, $b, $d));
}
<?php
require_once 'QuadraticRoots.php';
if (isset($_POST['ok'])) {
$a = $_POST['a'];
$b = $_POST['b'];
$c = $_POST['c'];
echo "Ваше уравнение: " . $a . "x^2 " . "+ " . $b . "x " . "+ " . $c . " = 0";
echo "<br>";
$d = pow($b, 2) - 4 * $a * $c;
echo "Дискриминант D = " . $d;
echo "<br>";
$roots = new QuadraticRoots();
$roots->roots($a, $b, $d);
}