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How to resize image (320,240) using php


                        

class SimpleImage {
  
    public $image;
    public $image_type;

    public function __construct($filename = null){
        if (!empty($filename)) {
            $this->load($filename);
        }
    }

    public function load($filename) {
        $image_info = getimagesize($filename);
        $this->image_type = $image_info[2];

        if ($this->image_type == IMAGETYPE_JPEG) {
            $this->image = imagecreatefromjpeg($filename);
        } elseif ($this->image_type == IMAGETYPE_GIF) {
            $this->image = imagecreatefromgif($filename);
        } elseif ($this->image_type == IMAGETYPE_PNG) {
            $this->image = imagecreatefrompng($filename);
        } else {
            throw new Exception("The file you're trying to open is not supported");
        }
    }

    public function save($filename, $image_type = IMAGETYPE_JPEG, $compression = 75, $permissions = null) {
        if ($image_type == IMAGETYPE_JPEG) {
            imagejpeg($this->image,$filename,$compression);
        } elseif ($image_type == IMAGETYPE_GIF) {
            imagegif($this->image,$filename);        
        } elseif ($image_type == IMAGETYPE_PNG) {
            imagepng($this->image,$filename);
        }

        if ($permissions != null) {
            chmod($filename,$permissions);
        }
    }

    public function output($image_type=IMAGETYPE_JPEG, $quality = 80) {
        if ($image_type == IMAGETYPE_JPEG) {
            header("Content-type: image/jpeg");
            imagejpeg($this->image, null, $quality);
        } elseif ($image_type == IMAGETYPE_GIF) {
            header("Content-type: image/gif");
            imagegif($this->image);        
        } elseif ($image_type == IMAGETYPE_PNG) {
            header("Content-type: image/png");
            imagepng($this->image);
        }
    }

    public function getWidth() {
        return imagesx($this->image);
    }

    public function getHeight() {
        return imagesy($this->image);
    }

    public function resizeToHeight($height) {
        $ratio = $height / $this->getHeight();
        $width = round($this->getWidth() * $ratio);
        $this->resize($width,$height);
    }

    public function resizeToWidth($width) {
        $ratio = $width / $this->getWidth();
        $height = round($this->getHeight() * $ratio);
        $this->resize($width,$height);
    }

    public function square($size) {
        $new_image = imagecreatetruecolor($size, $size);

        if ($this->getWidth() > $this->getHeight()) {
            $this->resizeToHeight($size);
           
            imagecolortransparent($new_image, imagecolorallocate($new_image, 0, 0, 0));
            imagealphablending($new_image, false);
            imagesavealpha($new_image, true);
            imagecopy($new_image, $this->image, 0, 0, ($this->getWidth() - $size) / 2, 0, $size, $size);

        } else {
            $this->resizeToWidth($size);
           
            imagecolortransparent($new_image, imagecolorallocate($new_image, 0, 0, 0));
            imagealphablending($new_image, false);
            imagesavealpha($new_image, true);
            imagecopy($new_image, $this->image, 0, 0, 0, ($this->getHeight() - $size) / 2, $size, $size);

        }

        $this->image = $new_image;
    }
  
    public function scale($scale) {
        $width = $this->getWidth() * $scale/100;
        $height = $this->getHeight() * $scale/100;
        $this->resize($width,$height);
    }
  
    public function resize($width,$height) {
        $new_image = imagecreatetruecolor($width, $height);
       
        imagecolortransparent($new_image, imagecolorallocate($new_image, 0, 0, 0));
        imagealphablending($new_image, false);
        imagesavealpha($new_image, true);
       
        imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
        $this->image = $new_image;  
    }

    public function cut($x, $y, $width, $height) {
        $new_image = imagecreatetruecolor($width, $height);   

        imagecolortransparent($new_image, imagecolorallocate($new_image, 0, 0, 0));
        imagealphablending($new_image, false);
        imagesavealpha($new_image, true);

        imagecopy($new_image, $this->image, 0, 0, $x, $y, $width, $height);

        $this->image = $new_image;
    }

    public function maxarea($width, $height = null)    {
        $height = $height ? $height : $width;
       
        if ($this->getWidth() > $width) {
            $this->resizeToWidth($width);
        }
        if ($this->getHeight() > $height) {
            $this->resizeToheight($height);
        }
    }
   
    public function minarea($width, $height = null)    {
        $height = $height ? $height : $width;
       
        if ($this->getWidth() < $width) {
            $this->resizeToWidth($width);
        }
        if ($this->getHeight() < $height) {
            $this->resizeToheight($height);
        }
    }

    public function cutFromCenter($width, $height) {
       
        if ($width < $this->getWidth() && $width > $height) {
            $this->resizeToWidth($width);
        }
        if ($height < $this->getHeight() && $width < $height) {
            $this->resizeToHeight($height);
        }
       
        $x = ($this->getWidth() / 2) - ($width / 2);
        $y = ($this->getHeight() / 2) - ($height / 2);
       
        return $this->cut($x, $y, $width, $height);
    }

    public function maxareafill($width, $height, $red = 0, $green = 0, $blue = 0) {
        $this->maxarea($width, $height);
        $new_image = imagecreatetruecolor($width, $height);
        $color_fill = imagecolorallocate($new_image, $red, $green, $blue);
        imagefill($new_image, 0, 0, $color_fill);       
        imagecopyresampled(    $new_image,
                            $this->image,
                            floor(($width - $this->getWidth())/2),
                            floor(($height-$this->getHeight())/2),
                            0, 0,
                            $this->getWidth(),
                            $this->getHeight(),
                            $this->getWidth(),
                            $this->getHeight()
                        );
        $this->image = $new_image;
    }

}


$image = new SimpleImage();
$image->load('Your Image path'); // like as ..../desktop/your_new_image_name.jpg
$image->resize(320,240);
$image->save('Where are u wnat to save this converted image'); // like as uploads/your_new_image_name.jpg

?>

<img src="your new image file">

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