<?php
class Image{

    public static function create_thumbnail($path, $save, $width, $height) {
      $info = getimagesize($path);
      $size = array($info[0], $info[1]);

    	switch ($info["mime"]) {
	        case 'image/png':
	      $src = imagecreatefrompng($path);
	            break;
	        case 'image/jpeg':
	      $src = imagecreatefromjpeg($path);
	            break;
	        case 'image/gif':
	      $src = imagecreatefromgif($path);
	            break;
	        default:
	            return false;
	            break;
	    }

      $thumb = imagecreatetruecolor($width, $height);

      $src_aspect = $size[0] / $size[1];
      $thumb_aspect = $width / $height;

      if ($src_aspect < $thumb_aspect){
          //narrower
          $scale = $width / $size[0];
          $new_size = array($width, $width / $src_aspect);
          $src_pos = array(0, ($size[1] * $scale - $height) / $scale / 2);
      }else if ($src_aspect > $thumb_aspect){
          // wider
          $scale = $height / $size[1];
          $new_size = array($height * $src_aspect, $height);
          $src_pos = array(($size[0] * $scale - $width) / $scale / 2, 0);
      }else{
          //same shape
          $new_size = array($width, $height);
          $src_pos = array(0, 0);
      }

      $new_size[0] = max($new_size[0], 1);
      $new_size[1] = max($new_size[1], 1);

      imagecopyresampled($thumb, $src, 0, 0, $src_pos[0], $src_pos[1], $new_size[0], $new_size[1], $size[0], $size[1]);

      if ($save ===false){//debug mode
        switch ($info["mime"]) {
            case 'image/png':
                return imagepng($thumb);
                break;
            case 'image/jpeg':
                return imagejpeg($thumb);
                break;
            case 'image/gif':
                return imagegif($thumb);
                break;
        }
      }else{//save actual images
        switch ($info["mime"]) {
            case 'image/png':
                return imagepng($thumb, $save);
                break;
            case 'image/jpeg':
                return imagejpeg($thumb, $save);
                break;
            case 'image/gif':
                return imagegif($thumb, $save);
                break;
        }
      }
      //kevin neven 09-06-2016
    }
	public static function upload($image, $path, $thumbnail = FALSE) {
	    return  fileManagement::upload($image, 5000, $path, array("png", "jpeg", "jpg", "gif"));
	}
}


<?php
class fileManagement {
	public static function upload($a_file, $maxKB, $path, $allowedExt) {
		$path = rtrim($path,"/");
		$path .= "/";
		$file = $a_file;

		//file properties
		$fileName = $file["name"];
		$fileTmp = $file["tmp_name"];
		$fileSize = $file["size"];
		$fileError = $file["error"];

		//get the file extension
		$fileExt = explode(".", $fileName);
		$fileExt = strtolower(end($fileExt));


		if(in_array($fileExt, $allowedExt)){

			if($fileError === 0){
				if($fileSize <= $maxKB * 1024){ //check if the filesize is smaller or equal to the max size

					$fileNameAndPath = self::generateRandomFileName($fileExt,$path);

					$errorAmount = 0;

					while (file_exists($fileNameAndPath)){ //
						$fileNameAndPath = self::generateRandomFileName($fileExt,$path);
						$errorx++;
						if ($errorAmount == 5) {
							return "error";
						}
					}

					if(move_uploaded_file($fileTmp, $fileNameAndPath)){
						return $fileNameAndPath;
					}
				}
			}
		}
	}
	private static function generateRandomFileName($fileExtion, $path) {
		$filename = uniqid("",TRUE) . "." . $fileExtion; // make the file name... uniqid()  returns a random string. so you would get 32y243hqtkglrhjlag.jpg
		return $path . $filename;
	}
}