equ2nddeg.php

<?php
function getContent($url, $cookiePath)
{
//used Export Cookies extension to get NC cookie
$ch = curl_init ();
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt ( $ch, CURLOPT_URL, $url );
curl_setopt ( $ch, CURLOPT_HEADER, 0 );
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt ( $ch, CURLOPT_CONNECTTIMEOUT, 0 );
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookiePath);
curl_setopt($ch, CURLOPT_VERBOSE, true);
$file_contents = curl_exec ( $ch );
if (curl_errno ( $ch )) {
    echo curl_error ( $ch );
    curl_close ( $ch );
    exit ();
}
curl_close ( $ch );
return $file_contents;
}
$content = getContent("https://www.newbiecontest.org/epreuves/prog/prog6.php", 'C:/Temp/cookies.txt');
$equation = substr($content, 54);
$equation = substr($equation, 0, -4);
echo $equation . "<br />";

$array = preg_split("/x/", $equation);
$array[1] = substr($array[1], 2);
if(empty($array[0]))
{
    echo "a is empty <br />";
    $intA = 1;
}
else
{
    $intA = $array[0][0];
}
$intA = (int) $intA;
echo "a : " . $intA . "<br />";
if (strlen($array[1])>3)
{
    //got to add b = 10 case
    $intB = substr($array[1], -1);
}
else
{
    $intB = 1;
}
$intB = (int) $intB;
if (!strcmp($array[1][1], '-'))
{
    $intB = -$intB;
}
echo "b : " . $intB . "<br />";
if(empty($array[2]))
{
    $intC = 0;
}
else
{
    $intC = substr($array[2], -1);
    if (!strcmp($array[2][1], '-'))
    {
        $intC = -$intC;
    }
}
echo "c : " . $intC . "<br />";
$delta = $intB * $intB * - 4 * $intA * $intC;
echo "delta : " . $delta . "<br />";
$x1 = (-$intB - sqrt($delta))/(2*$intA);
$x1 = round($x1, 2);
echo "x1 : " . $x1 . "<br />";
$x2 = (-$intB + sqrt($delta))/(2*$intA);
$x2 = round($x2, 2);
echo "x2 : " . $x2 . "<br />";
if ($x1 < $x2)
{
    echo "Highest is : " . $x2 . "<br />";
    $solution = $x2;
}
else
{
    echo "Highest is : " . $x1 . "<br />";
    $solution = $x1;
}
$subm = "https://www.newbiecontest.org/epreuves/prog/verifpr6.php?solution=" . $solution;
header("Location: $subm");
?>