This class is used to verify the image dimensions after upload.

Image_dimensions.php

<?php 
/**
[Image_dimensions]
This class is used to verify the image dimensions after upload.
@author Valdiney França
*/

class Image_dimensions 
{
	private $image;
	private $needs_width;
	private $needs_height;
	private $very_large = "large";
	private $very_small = "small";
    
    # Receive the full path of the image
	public function set_image($image_path)
	{
		$this->image = getimagesize($image_path);
	}
    
    # Set the width values of the images that you wanna accept
	public function set_width($width)
	{
		$this->needs_width = $width;
	}
    
    # Set the height values of the images that you wanna accept
	public function set_height($height)
	{
		$this->needs_height = $height;
	}
    
    # Get the image width
	public function get_width()
	{
		return "{$this->image[0]}px";
	}
    
    # Get the image height
	public function get_height()
	{
		return "{$this->image[1]}px";
	}
    
    # [Private method]
    # Checking the width dimensions
    # @return : String : large or small
	private function width_checking()
	{
		if ($this->image[0] > $this->needs_width) {
			return $this->very_large;
		}

		if ($this->image[0] < $this->needs_width) {
			return $this->very_small;
		}

		return false;
	}
    
    # [Private method]
    # Checking the height dimensions
    # @return : String : large or small
	private function height_checking()
	{
		if ($this->image[1] > $this->needs_height) {
			return $this->very_large;
		}

		if ($this->image[1] < $this->needs_height) {
			return $this->very_small;
		}

		return false;
	}
    
    # [Public method]
    # Checking the width dimensions
    # @return : String : large or small
	public function width_verify()
	{
		if ($this->width_checking() == $this->very_large) {
			return $this->very_large;
		}

		if ($this->width_checking() == $this->very_small) {
			return $this->very_small;
		}

		return false;
	}
    
    # [Public method]
    # Checking the height dimensions
    # @return : String : large or small
	public function height_verify()
	{
		if ($this->height_checking() == $this->very_large) {
			return $this->very_large;
		}

		if ($this->height_checking() == $this->very_small) {
			return $this->very_small;
		}

		return false;
	}
}