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<?php
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/**
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* BulletProof
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*
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* A single-file PHP library for uploading images with security
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*
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* PHP support 5.3+
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*
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* @package BulletProof
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* @version 3.0.0
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* @author https://twitter.com/_samayo
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* @link https://github.com/samayo/bulletproof
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* @license MIT
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*/
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namespace Bulletproof;
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class BulletproofException extends \Exception {}
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class Image implements \ArrayAccess, \Serializable
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{
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/**
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* @var string The new image name, to be provided or will be generated.
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*/
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protected $name;
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/**
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* @var int The image width in pixels
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*/
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protected $width;
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/**
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* @var int The image height in pixels
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*/
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protected $height;
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/**
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* @var string The image mime type (extension)
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*/
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protected $mime;
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/**
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* @var string The full image path (dir + image + mime)
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*/
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protected $fullPath;
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/**
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* @var string The folder or image storage location
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*/
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protected $location;
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/**
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* @var array A json format of all information about an image
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*/
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protected $serialize = array();
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/**
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* @var array The min and max image size allowed for upload (in bytes)
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*/
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protected $size = array(100, 50000);
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/**
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* @var array The max height and width image allowed
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*/
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protected $dimensions = array(500, 5000);
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/**
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* @var array The mime types allowed for upload
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*/
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protected $mimeTypes = array("jpeg", "png", "gif");
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/**
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* @var array list of known image types
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*/
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protected $imageMimes = array(
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1 => "gif", "jpeg", "png", "swf", "psd",
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"bmp", "tiff", "tiff", "jpc", "jp2", "jpx",
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"jb2", "swc", "iff", "wbmp", "xbm", "ico"
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);
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/**
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* @var array storage for the $_FILES global array
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*/
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private $_files = array();
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/**
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* @var array error messages strings
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*/
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protected $commonErrors = array(
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UPLOAD_ERR_OK => "",
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UPLOAD_ERR_INI_SIZE => "Image is larger than the specified amount set by the server",
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UPLOAD_ERR_FORM_SIZE => "Image is larger than the specified amount specified by browser",
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UPLOAD_ERR_PARTIAL => "Image could not be fully uploaded. Please try again later",
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UPLOAD_ERR_NO_FILE => "Image is not found",
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UPLOAD_ERR_NO_TMP_DIR => "Can't write to disk, due to server configuration ( No tmp dir found )",
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UPLOAD_ERR_CANT_WRITE => "Failed to write file to disk. Please check you file permissions",
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UPLOAD_ERR_EXTENSION => "A PHP extension has halted this file upload process"
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);
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/**
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* Constructor
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*
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* @param array $_files represents the $_FILES array passed as dependency
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*/
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public function __construct(array $_files = [])
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{
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$this->_files = $_files;
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}
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/**
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* Gets the real image mime type
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*
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* @param $tmp_name string The upload tmp directory
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*
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* @return bool|string
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*/
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protected function getImageMime($tmp_name)
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{
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if (isset($this->imageMimes[exif_imagetype($tmp_name)])) {
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return $this->imageMimes [exif_imagetype($tmp_name)];
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}
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throw new BulletproofException(" Unable to get mime type of $tmp_name ");
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}
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/**
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* @param mixed $offset
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* @param mixed $value
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*/
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public function offsetSet($offset, $value){}
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/**
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* @param mixed $offset
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* @return null
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*/
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public function offsetExists($offset){}
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/**
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* @param mixed $offset
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*/
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public function offsetUnset($offset){}
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/**
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* Gets array value \ArrayAccess
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*
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* @param mixed $offset
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*
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* @return bool|mixed
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*/
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public function offsetGet($offset)
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{
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if (isset($this->_files[$offset]) && file_exists($this->_files[$offset]["tmp_name"])) {
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$this->_files = $this->_files[$offset];
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return true;
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}
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throw new BulletProofException("Upload name $offset not found");
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}
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/**
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* Provide image name if not provided
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*
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* @param null $name
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* @return $this
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*/
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public function setName($name = null)
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{
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if ($name) {
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$this->name = filter_var($name, FILTER_SANITIZE_STRING);
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}
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return $this;
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}
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/**
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* Define a mime type for uploading
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*
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* @param array $fileTypes
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*
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* @return $this
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*/
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public function setMime(array $fileTypes)
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{
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$this->mimeTypes = $fileTypes;
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return $this;
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}
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/**
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* Define a min and max image size for uploading
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*
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* @param $min int minimum value in bytes
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* @param $max int maximum value in bytes
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*
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* @return $this
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*/
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public function setSize($min, $max)
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{
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$this->size = array($min, $max);
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return $this;
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}
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/**
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* Creates a location for upload storage
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*
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* @param $dir string the folder name to create
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* @param int $permission chmod permission
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*
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* @return $this
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*/
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public function setLocation($dir = "Uploads", $permission = 0666)
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{
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if (!file_exists($dir) && !is_dir($dir) && !$this->location) {
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$createFolder = @mkdir("" . $dir, (int) $permission, true);
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if (!$createFolder) {
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throw new BulletproofException("Unable to create folder name: $dir in " . __DIR__);
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return;
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}
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}
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$this->location = $dir;
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return $this;
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}
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/**
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* Sets acceptable max image height and width
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*
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* @param $maxWidth int max width value
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* @param $maxHeight int max height value
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*
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* @return $this
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*/
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public function setDimension($maxWidth, $maxHeight)
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{
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$this->dimensions = array($maxWidth, $maxHeight);
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return $this;
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}
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/**
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* Returns the image name
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*
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* @return string
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*/
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public function getName()
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{
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if (!$this->name) {
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return uniqid(true) . "_" . str_shuffle(implode(range("e", "q")));
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}
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return $this->name;
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}
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/**
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* Returns the full path of the image ex "location/image.mime"
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*
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* @return string
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*/
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public function getFullPath()
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{
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$this->fullPath = $this->location . "/" . $this->name . "." . $this->mime;
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return $this->fullPath;
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}
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/**
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* Returns the image size in bytes
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*
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* @return int
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*/
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public function getSize()
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{
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return (int) $this->_files["size"];
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}
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/**
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* Returns the image height in pixels
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*
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* @return int
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*/
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public function getHeight()
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{
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if ($this->height != null) {
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return $this->height;
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}
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list(, $height) = getImageSize($this->_files["tmp_name"]);
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return $height;
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}
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/**
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* Returns the image width
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*
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* @return int
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*/
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public function getWidth()
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{
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if ($this->width != null) {
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return $this->width;
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}
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list($width) = getImageSize($this->_files["tmp_name"]);
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return $width;
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}
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/**
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* Returns the storage / folder name
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*
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* @return string
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*/
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public function getLocation()
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{
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if(!$this->location){
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$this->setLocation();
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}
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return $this->location;
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}
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/**
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* Returns a JSON format of the image width, height, name, mime ...
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*
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* @return string
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*/
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public function getJson()
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{
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return json_encode($this->serialize);
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}
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/**
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* Returns the image mime type
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*
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* @return string
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*/
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public function getMime()
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{
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return $this->mime;
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}
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/**
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339
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* This methods validates and uploads the image
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*
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* @return bool|Image|null
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*
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343
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* @throws BulletproofException
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*/
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public function upload()
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346
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{
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/* modify variable names for convenience */
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348
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$image = $this;
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$files = $this->_files;
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/* check if required php extension is found */
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if(!function_exists('exif_imagetype')){
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throw new BulletproofException("Function 'exif_imagetype' Not found. Please enable \"php_exif\" in your PHP.ini");
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}
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/* initialize image properties */
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$image->name = $image->getName();
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$image->width = $image->getWidth();
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$image->height = $image->getHeight();
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$image->location = $image->getLocation();
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list($minSize, $maxSize) = $image->size;
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362
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363
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/* check for common upload errors first */
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364
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if($error = $this->commonErrors[$files["error"]]){
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365
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throw new BulletproofException($error);
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}
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367
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368
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/* check image for valid mime types and return mime */
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369
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$image->mime = $image->getImageMime($files["tmp_name"]);
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371
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/* validate image mime type */
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372
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|
|
if (!in_array($image->mime, $image->mimeTypes)) {
|
373
|
|
|
$ext = implode(", ", $image->mimeTypes);
|
374
|
|
|
throw new BulletproofException("invalid mime type, please upload images of only ($ext) types");
|
375
|
|
|
}
|
376
|
|
|
|
377
|
|
|
/* check image size based on the settings */
|
378
|
|
|
if ($files["size"] < $minSize || $files["size"] > $maxSize) {
|
379
|
|
|
$min = intval($minSize / 1000) ?: 1; $max = intval($maxSize / 1000);
|
|
|
|
|
380
|
|
|
|
381
|
|
|
throw new BulletproofException("invalid image size");
|
382
|
|
|
}
|
383
|
|
|
|
384
|
|
|
/* check image dimension */
|
385
|
|
|
list($allowedWidth, $allowedHeight) = $image->dimensions;
|
386
|
|
|
|
387
|
|
|
if ($image->height > $allowedHeight || $image->width > $allowedWidth) {
|
388
|
|
|
throw new BulletproofException("invalid image width/height");
|
389
|
|
|
}
|
390
|
|
|
|
391
|
|
|
if($image->height < 4 || $image->width < 4){
|
392
|
|
|
throw new BulletproofException("invalid image width/height");
|
393
|
|
|
|
394
|
|
|
}
|
395
|
|
|
|
396
|
|
|
/* set and get folder name */
|
397
|
|
|
$image->fullPath = $image->location. "/" . $image->name . "." . $image->mime;
|
398
|
|
|
|
399
|
|
|
/* gather image info for json storage */
|
400
|
|
|
$image->serialize = array(
|
401
|
|
|
"name" => $image->name,
|
402
|
|
|
"mime" => $image->mime,
|
403
|
|
|
"height" => $image->height,
|
404
|
|
|
"width" => $image->width,
|
405
|
|
|
"size" => $files["size"],
|
406
|
|
|
"location" => $image->location,
|
407
|
|
|
"fullpath" => $image->fullPath
|
408
|
|
|
);
|
409
|
|
|
|
410
|
|
|
$moveUpload = $image->moveUploadedFile($files["tmp_name"], $image->fullPath);
|
411
|
|
|
|
412
|
|
|
if (false === $moveUpload) {
|
413
|
|
|
throw new Exception("Unknown error during image upload");
|
414
|
|
|
}
|
415
|
|
|
|
416
|
|
|
return $image;
|
417
|
|
|
|
418
|
|
|
}
|
419
|
|
|
|
420
|
|
|
/**
|
421
|
|
|
* Final upload method to be called, isolated for testing purposes
|
422
|
|
|
*
|
423
|
|
|
* @param $tmp_name int the temporary location of the image file
|
424
|
|
|
* @param $destination int upload destination
|
425
|
|
|
*
|
426
|
|
|
* @return bool
|
427
|
|
|
*/
|
428
|
|
|
public function moveUploadedFile($tmp_name, $destination)
|
429
|
|
|
{
|
430
|
|
|
return move_uploaded_file($tmp_name, $destination);
|
431
|
|
|
}
|
432
|
|
|
}
|
433
|
|
|
|