SimpleImage PHP Class

simpleimage.php

<?php
/**
 * File: SimpleImage.php
 * Author: Simon Jarvis
 * Modified by: Miguel Fermín
 * Based in: http://www.white-hat-web-design.co.uk/articles/php-image-resizing.php
 * 
 * This program is free software; you can redistribute it and/or 
 * modify it under the terms of the GNU General Public License 
 * as published by the Free Software Foundation; either version 2 
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
 * GNU General Public License for more details: 
 * http://www.gnu.org/licenses/gpl.html
 */

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;
	}

}

// Usage:
// Load the original image
$image = new SimpleImage('lemon.jpg');

// Resize the image to 600px width and the proportional height
$image->resizeToWidth(600);
$image->save('lemon_resized.jpg');

// Create a squared version of the image
$image->square(200);
$image->save('lemon_squared.jpg');

// Scales the image to 75%
$image->scale(75);
$image->save('lemon_scaled.jpg');

// Resize the image to specific width and height
$image->resize(80,60);
$image->save('lemon_resized2.jpg');

// Resize the canvas and fill the empty space with a color of your choice
$image->maxareafill(600,400, 32, 39, 240);
$image->save('lemon_filled.jpg');

// Output the image to the browser:
$image->output();

Hi,

When jpg file has exif information, sometimes, orientation is revert while resizing using this class.
In the load function, I've fixed it like this :

function load($filename) {
$image_info = getimagesize($filename);
$this->image_type = $image_info[2];
if( $this->image_type == IMAGETYPE_JPEG ) {
$this->image = imagecreatefromjpeg($filename);
$exif = exif_read_data($filename);
if(!empty($exif['Orientation'])) {
switch($exif['Orientation']) {
case 8:
$this->image = imagerotate($this->image,90,0);
break;
case 3:
$this->image = imagerotate($this->image,180,0);
break;
case 6:
$this->image = imagerotate($this->image,-90,0);
break;
}
}
} elseif( $this->image_type == IMAGETYPE_GIF ) {
$this->image = imagecreatefromgif($filename);
} elseif( $this->image_type == IMAGETYPE_PNG ) {
$this->image = imagecreatefrompng($filename);
} elseif( $this->image_type == IMAGETYPE_BMP ) {
$this->image = imagecreatefrombmp($filename);
}

}

Hi guys.

I was using simpleimage to do some image formatting on my project. Currently I have a setup using resize() which I intend to resize all image to 700x600 pixels. I have manage to setup everything and the project is LIVE'd already but during production, there was a case where the image would resize to 699x600 while the others are all 700x600 thus breaking the layout.

Was wondering if anyone faced this before?

Thanks

I offer a to screen output rather then using headers. Post kepts eating my img tags =( lol

    public function output($image_type = IMAGETYPE_JPEG, $quality = 80)
    {
        if ($image_type == IMAGETYPE_JPEG) {
            //header("Content-type: image/jpeg");
            // start buffering
            ob_start();
            // output jpeg (or any other chosen) format & quality
            imagejpeg($this->image, NULL, 85);
            // capture output to string
            $contents = ob_get_contents();
            // end capture
            ob_end_clean();
            // be tidy; free up memory
            imagedestroy($this->image);
            $data = base64_encode($contents);
            echo '<img src="data:image/jpg;base64,'. $data .'" />';
        } elseif ($image_type == IMAGETYPE_GIF) {
            //header("Content-type: image/gif");
            // start buffering
            ob_start();
            // output gif (or any other chosen) format & quality
            imagegif($this->image);
            // capture output to string
            $contents = ob_get_contents();
            // end capture
            ob_end_clean();
            // be tidy; free up memory
            imagedestroy($this->image);
            $data = base64_encode($contents);
            echo '<img src="data:image/gif;base64,'. $data .'" />';
        } elseif ($image_type == IMAGETYPE_PNG) {
            //header("Content-type: image/png");
            // start buffering
            ob_start();
            // output png (or any other chosen) format & quality
            imagepng($this->image);
            // capture output to string
            $contents = ob_get_contents();
            // end capture
            ob_end_clean();
            // be tidy; free up memory
            imagedestroy($this->image);
            $data = base64_encode($contents);
            echo '<img src="data:image/png;base64,'. $data .'" />';
        }
    }

Hello

I wanted to use this function for my image by downloading the images with file_get_contents

My code does not work
$url=ImageCreateFromString(file_get_contents('http://www.bicivendita.it/WebRoot/registerit3/Shops/990241304/509A/9674/BCB8/5136/52FE/C0A8/8007/4E62/BICICLETTE_DA_CITTA_LEGGERE_DA_UOMO_FUORISERIE.jpg'));
$image = new SimpleImage($url);
It's possible?
Regards

Great code. Thanks

Hi i added new function text watermark
`function watermark_text($waterMarkText, $font=4, $r=158, $g=158, $b=158) {
$width = imagefontwidth($font) * strlen($waterMarkText) ;

   $height = imagefontheight($font) ;
    
   $image=$this->image;
    
   $x = $this->getWidth() - $width - 10;
    
   $y = $this->getHeight() - $height - 10;
    
   $backgroundColor = imagecolorallocate ($image, 255,255,255);
    
   $textColor = imagecolorallocate ($image, $r,$g,$b);
    
   imagestring ($image, $font, $x, $y, $waterMarkText, $textColor);

   $this->image = $image;

}`

Use:
$img->watermark_text('For Example.com', 8, 215, 13, 213)

Miguel, gracias por la librería. Considera incluir la aportación de LeChatNoir69
LeChatNoir69
Perfect fix.
Tks!!!!