class mmhclass_core_functions
	{
		function clean_array($array)
		{
			if (is_array($array) == true) {
				$array_keys = array_keys($array);
				for ($i = 0; $i < count($array_keys); $i++) {
					$key     = $array_keys[$i];
					$value   = $array[$key];
					$new_key = strtolower($key);
					unset($array[$key]);
					if (is_array($value) == true) {
						$array[$new_key] = $this->clean_array($value);
					} elseif ($this->is_null($value) == NULL) {
						$array[$new_key] = $this->clean_value($value);
					}
				}
			}
			return $array;
		}

		function clean_value($value, $value_decode = false)
		{
			if ($value_decode == true) { // <-- Decode cleaned string
				$value = html_entity_decode($value);
				$value = strtr($value, array_flip(get_html_translation_table(HTML_SPECIALCHARS, ENT_COMPAT)));
				$value = str_replace("<br />", "\n", $value);
			} else {
				$value = str_replace("\\\"", "\"", $value); // <-- Because stripslashes() removes Windows directory slashes
				$value = str_replace("\\'", "'", $value); // <-- ^
				$value = str_replace("\\\\", "\\", $value); // <!-- ^^
				$value = str_replace("&#032;", " ", $value);
				$value = str_replace("&", "&amp;", $value);
				$value = str_replace("<!--", "&#60;&#33;--", $value);
				$value = str_replace("-->", "--&#62;" , $value);
				$value = preg_replace("/<script/i", "&#60;script", $value);
				$value = str_replace(">", "&gt;", $value);
				$value = str_replace("<", "&lt;", $value);
				$value = str_replace('"', "&quot;", $value);
				$value = str_replace("\n", "<br />", $value);
				$value = str_replace("$", "&#036;", $value);
				$value = str_replace("\r", NULL, $value); 
				$value = str_replace("!", "&#33;", $value);
				$value = str_replace("'", "&#39;", $value); // <-- zProtecting the world one variable at a time.
			}
			return $value;
		}
		
		function is_null($string) 
		{
			return ((empty($string) == false) ? false : true);
		}

		function format_number($number)
		{
			return strrev(preg_replace("/(\d{3})(?=\d)(?!\d*\.)/", "$1,", strrev(intval($number))));
		}

		function valid_string($string, $valid_chars = "-_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
		{
			for ($i = 0; $i < strlen($string); $i++) {
				$string_preg_match = preg_quote(substr($string, $i, 1));
				if (preg_match("/{$string_preg_match}/", $valid_chars) == false) {
					return false;
				}
			}
			return true;
 		}

		function random_string($max_length = 20, $random_chars = "abcdefghijklmnopqrstuvwxyz0123456789")
		{
			for ($i = 0; $i < $max_length; $i++) {
				$random_key     = mt_rand(0, strlen($random_chars));
				$random_string .= substr($random_chars, $random_key, 1);
			}
			return strtolower(str_shuffle($random_string));
		}

		function file_extension($filename)
		{
			return strtolower(substr(basename($filename), strrpos(basename($filename), ".") + 1));
		}

		function thumbnail_name($filename)
		{
			$extension = $this->file_extension($filename);
			return preg_replace("/([-_a-zA-Z0-9]{1,20})\.{$extension}/i", "$1_thumb.{$extension}", $filename);
		}
		
		function format_filesize($filesize = 0)
		{
			$filesize_count = 0;
			$filesize_names = array("Byte(s)", "Kilobyte(s)", "Megabyte(s)", "Gigabyte(s)", "Terabyte(s)", "Petabyte(s)", "Exabyte(s)", "Zettabyte(s)", "Yottabyte(s)");
			while (($filesize / 1024) >= 1) {
				$filesize_count++;
				$filesize = ($filesize / 1024);
			}
			return (($this->is_null($filesize) == true || $filesize_count > 9) ? "Unknown Filesize" : substr($filesize, 0, strpos($filesize, ".") + 4)." {$filesize_names[$filesize_count]}");
		}

		function valid_email($email_address)
		{
			return ((preg_match("/^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/", trim($email_address)) == true) ? true : false);
		}

		function fetch_url($base = true, $www = true, $query = true)
		{
			global $mmhclass;
			$the_url  = (($this->is_null($mmhclass->input->server_vars['https']) == false) ? "https://" : "http://");
			$the_url .= (($www == true && preg_match("/^www\./", $mmhclass->input->server_vars['http_host']) == false) ? "www.{$mmhclass->input->server_vars['http_host']}" : $mmhclass->input->server_vars['http_host']);
			$the_url .= ((pathinfo($mmhclass->input->server_vars['php_self'], PATHINFO_DIRNAME) != "/") ? (pathinfo($mmhclass->input->server_vars['php_self'], PATHINFO_DIRNAME)."/") : pathinfo($mmhclass->input->server_vars['php_self'], PATHINFO_DIRNAME)); 
			$the_url .= (($base == true) ? pathinfo($mmhclass->input->server_vars['php_self'], PATHINFO_BASENAME) : NULL);
			$the_url .= (($query == true && $this->is_null($mmhclass->input->server_vars['query_string']) == false) ? "?{$mmhclass->input->server_vars['query_string']}" : NULL); 
			$the_url  = ((strtoupper(substr(PHP_OS, 0, 3)) === "WIN") ? str_replace("\/", "/", $the_url) : $the_url); // <- Because Windows hates forward slashes
			return $the_url;
		}

		function create_thumbnail($filename, $save_to_disk = true)
		{
			global $mmhclass;
			$thumbnail = $this->thumbnail_name($filename);
			$extension = $this->file_extension($filename);
			if (extension_loaded("imagick") == true) {
				$image = new Imagick($mmhclass->info->root_path.$mmhclass->info->config['upload_path'].$filename);
				$image_size['0'] = $image->getImageHeight();
				$image_size['1'] = $image->getImageWidth();
			} else {
				if (in_array($extension, array("png", "gif", "jpg", "jpeg")) == true) {
					$image_size = getimagesize($mmhclass->info->root_path.$mmhclass->info->config['upload_path'].$filename);		
					$function_extension = str_replace("jpg", "jpeg", $extension);
					$image_function = "imagecreatefrom{$function_extension}";
					$image = $image_function($mmhclass->info->root_path.$mmhclass->info->config['upload_path'].$filename);
				}
			}
		
			if (is_resource($image) == true && extension_loaded("imagick") == false || $image == true) {
				if ($image_size['0'] > $image_size['1']) {
					$thumbnail_width  = $mmhclass->info->config['thumbnail_width'];
					$thumbnail_height = (($image_size['1'] * $mmhclass->info->config['thumbnail_height']) / $image_size['0']);
				} elseif ($image_size['0'] < $image_size['1']) {
					$thumbnail_width  = (($image_size['0'] * $mmhclass->info->config['thumbnail_width']) / $image_size['1']);
					$thumbnail_height = $mmhclass->info->config['thumbnail_height'];
				} elseif ($image_size['1'] == $image_size['0']) {
					$thumbnail_width  = $mmhclass->info->config['thumbnail_width'];
					$thumbnail_height = $mmhclass->info->config['thumbnail_height'];
				}
		
				if (extension_loaded("imagick") == false) {
					$thumbnail_image = imagecreatetruecolor($thumbnail_width, $thumbnail_height);
					imagecopyresampled($thumbnail_image, $image, 0, 0, 0, 0, $thumbnail_width, $thumbnail_height, $image_size[0], $image_size[1]);
				}
				
				if ($save_to_disk == true) {
					if (extension_loaded("imagick") == true) {
						$thumbnail_image = $image->clone();
						$thumbnail_image->thumbnailImage($thumbnail_width, $thumbnail_height, true);
						$thumbnail_image->writeImage($mmhclass->info->root_path.$mmhclass->info->config['upload_path'].$thumbnail);
						chmod($mmhclass->info->root_path.$mmhclass->info->config['upload_path'].$thumbnail, 0644);
					} else {
						imagejpeg($thumbnail_image, $mmhclass->info->root_path.$mmhclass->info->config['upload_path'].$thumbnail);
						chmod($mmhclass->info->root_path.$mmhclass->info->config['upload_path'].$thumbnail, 0644);
						imagedestroy($thumbnail_image);
						imagedestroy($image);	
					}
				} else {
					if (extension_loaded("imagick") == true) {
						$thumbnail_image = $image->clone();
						$thumbnail_image->thumbnailImage($thumbnail_width, $thumbnail_height, true);
						echo $thumbnail_image;
					} else {
						imagejpeg($thumbnail_image);
					}
				}
			}
		}
	}

?>