public static function canResize($imagePath)
{
$pictureInfo = getimagesize($imagePath);
$memoryNeeded = round(($pictureInfo[0] * $pictureInfo[1] * $pictureInfo['bits'] * $pictureInfo['channels'] / 8 + Math::power(2, 16)) * 1.65);
$memoryLimit = str_replace('M', '', Config::getMemoryLimit()) * Math::power(2, 20);
return $memoryLimit > $memoryNeeded + memory_get_usage(TRUE) ? TRUE : FALSE;
}
public static function discriminant3($a, $b, $c, $d)
{
return 18 * $a * $b * $c * $d - 4 * Math::power($b, 3) * $d + Math::power($b, 2) * Math::power($c, 2) - 4 * $a * Math::power($c, 3) - 27 * Math::power($a, 2) * Math::power($d, 2);
}
public function numberPower($number)
{
if (!Validator::isNumber($number)) {
throw new IllegalArgumentException();
}
$newMatrix = [];
for ($i = 0; $i < $this->getMatrixSizeA(); $i++) {
for ($j = 0; $j < $this->getMatrixSizeB(); $j++) {
$newMatrix[$i][$j] = Math::power($this->getMatrix()[$i][$j], $number);
}
}
return new Matrix($newMatrix);
}
public static function getFibonacci($x)
{
static $gro5;
$gro5 = Math::squareRoot(5);
$fi = (1 + $gro5) / 2;
return Math::power($fi, $x) / $gro5 - Math::power(1 - $fi, $x) / $gro5;
}
