ImageValidationCakePHP.php

public function imgValidate()
    {
        $validateImg = array(
            'image' => array(
                'isImage' => array(
                    'rule' => array('isImage'),
                    'message' => 'Please provide an image!',
                ),
                'dimension' => array(
                    'rule' => array('dimension', 320, 100),
                    'message' => 'Your image dimensions are incorrect: 320X100'
                ),
                'size' => array(
                    'rule' => array('size', 10240, 204800),
                    'message' => 'Image size should be between 10kb - 200kb'
                ),
                'rule3' => array(
                    'rule'    => array(
                        'extension',
                        array('gif', 'jpeg', 'png', 'jpg')
                    ),
                    'message' => "Please supply a valid image (allow gif, jpeg, png and jpg format)"
                ),
                'rule4' => array(
                    'rule' => array('fileSize', '<=', '1MB'),
                    'message' => 'Image must be less than 1MB'
                ),

            ),
        );

        $this->validate = $validateImg;
        return $this->validates();
    }

    public function dimension($data, $width = null, $height = null) {
        $dimension = $file = getimagesize($data['image']['tmp_name']);
        if($dimension['0'] == $width && $dimension['1'] == $height)
        {
            return true;
        }
        return false;
    }

    public function isImage($data) {
        if(!empty($data['image']['name']))
        {
            return true;
        }
        return false;
    }

    public function size($data, $min, $max) {
        $size =$data['image']['size'] ;
        if($size > $min && $size < $max)
        {
            return true;
        }
        return false;
    }