Calculate the dimension best fit into the max size (PHP)

// Set original size as default return dimension.
$dimension = new MyDimension($width, $height);
 
// Check if original size is bigger than max size.
if ($width <= $maxWidth && $height <= $maxHeight) {     return $dimension; }   // We need to calculate the maximum best fit dimension.   // Calculate orignal and maximum ratio. $originalRatio = $width/$height; $maxRatio = $maxWidth/$maxHeight;   // Based on the ratios, calculate new width and height if ($maxRatio < $originalRatio) {     // Best fit ratio for width   $dimension->setWidth($maxWidth);
 
  // Only if ratio is on, height must be calculated on ratio
  if ($regardRatio) {
 
    $dimension->setHeight(round($maxWidth/$originalRatio));
  }
} else {
 
  // Best fit ratio for height
  $dimension->setHeight($maxHeight);
 
  // Only if ratio is on, width must be calculated on ratio
  if ($regardRatio) {
 
    $dimension->setWidth(round($maxHeight*$originalRatio));
  }
}
 
return $dimension;