BULLETPROOF

Bulletproof is a single-class library to securely upload images in PHP.

To watermark, resize, crop images checkout src/utils

Install

Using git

$ git clone https://github.com/samayo/bulletproof.git

Using composer

$ php composer.phar require samayo/bulletproof:2.0.*

Or download it manually based on the archived version of release-cycles.

Usage

Create an HTML form like this.

<form method="POST" enctype="multipart/form-data">
	<input type="hidden" name="MAX_FILE_SIZE" value="1000000"/>
	<input type="file" name="ikea"/>
	<input type="submit" value="upload"/>
</form>

And simply require the class to upload

require_once  "path/to/bulletproof.php";

$image = new Bulletproof\Image($_FILES);

if($image["ikea"]){
	$upload = $image->upload(); 
	
	if($upload){
		// OK
	}else{
		echo $image["error"]; 
	}
}

Setting Properties

Methods for defining allowed size, dimensions, mime types, location and image name

// call if you want to set new image name manually
$image->setName($name); 

// define min/max size limits for upload (size in bytes) 
$image->setSize($min, $max); 

// define acceptable mime types
$image->setMime(array($jpeg, $gif));  

// set max width/height limits (in pixels)
$image->setDimension($width, $height); 

// pass name (and optional chmod) to create folder for storage
$image->setLocation($folderName, $optionalPermission);  

Getting Properties

Methods for getting image info before and / or after upload.

// get the provided or auto-generated image name
$image->getName();

// get the image size (in bytes)
$image->getSize();

// get the image mime (extension)
$image->getMime();

// get the image width in pixels
$image->getWidth();

// get the image height in pixels
$image->getHeight();

// get image location (folder where images are uploaded)
$image->getLocation();

// get the full image path. ex 'images/logo.jpg'
$image->getFullPath();

// get the json format value of all the above information
$image->getJson();

Setting and Getting values, ..

To set and get image info, before or after image upload, use as:

$image = new Bulletproof\Image($_FILES);

$image->setName("samayo")
      ->setMime(["gif"])
      ->setLocation("avatars");

if($image["ikea"]){
	if($image->upload()){
		echo $image->getName(); // samayo
		echo $image->getMime(); // gif
		echo $image->getLocation(); // avatars
		echo $image->getFullPath(); // avatars/samayo.gif
	}
}

Image Manipulation

Bulletproof is upload-ONLY library, so image manipulation features are placed in a seperate folder src/utils.

This example shows how to crop an image to 80x56, after uploading.

require "src/bulletproof.php";
require "src/utils/func.image-crop.php"; // crop function
	
$image = new Bulletproof\Image($_FILES);
if($image["ikea"]){
	if($image->upload()){
  		$crop = Bulletproof\crop(
		  	$image->getFullPath(), 
		  	$image->getMime(),
		  	$image->getWidth(),
		  	$image->getHeight(),
		  	80,
		  	56
		);
	}
}

Uploaded image is now cropped to 80x56, For more examples, check src/utils

Creating custom responses

To create your own errors and responses, instead of the default error messages, use exceptions:

 try{

   if($image->getMime() !== "png"){
      throw new \Exception(" Image should be a 'png' type ");
   }

   if($image->getSize() < 1000){
      throw new \Exception(" Image size too small ");
   }

   if($image->upload()){
      // OK
   }else{
     throw new \Exception($image["error"]);
   }

 }catch(\Exception $e){
      echo $e->getMessage(); 
 }

What makes this secure?

• Uses exif_imagetype() to get the true image mime (.extension)
• Uses getimagesize() to check if image has a valid height / width in pixels.
• Sanitized images names, strict folder permissions and more...

License: MIT