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public/system/library/language.php

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+<?php
+/**
+ * @package		OpenCart
+ * @author		Daniel Kerr
+ * @copyright	Copyright (c) 2005 - 2017, OpenCart, Ltd. (https://www.opencart.com/)
+ * @license		https://opensource.org/licenses/GPL-3.0
+ * @link		https://www.opencart.com
+*/
+
+/**
+* Language class
+*/
+class Language {
+	private $default = 'en-gb';
+	private $directory;
+	public $data = array();
+	
+	/**
+	 * Constructor
+	 *
+	 * @param	string	$file
+	 *
+ 	*/
+	public function __construct($directory = '') {
+		$this->directory = $directory;
+	}
+	
+	/**
+     * 
+     *
+     * @param	string	$key
+	 * 
+	 * @return	string
+     */
+	public function get($key) {
+		return (isset($this->data[$key]) ? $this->data[$key] : $key);
+	}
+	
+	public function set($key, $value) {
+		$this->data[$key] = $value;
+	}
+	
+	/**
+     * 
+     *
+	 * @return	array
+     */	
+	public function all() {
+		return $this->data;
+	}
+	
+	/**
+     * 
+     *
+     * @param	string	$filename
+	 * @param	string	$key
+	 * 
+	 * @return	array
+     */	
+	public function load($filename, $key = '') {
+		if (!$key) {
+			$_ = array();
+	
+			$file = DIR_LANGUAGE . $this->default . '/' . $filename . '.php';
+	
+			if (is_file($file)) {
+				require(modification($file));
+			}
+	
+			$file = DIR_LANGUAGE . $this->directory . '/' . $filename . '.php';
+			
+			if (is_file($file)) {
+				require(modification($file));
+			} 
+	
+			$this->data = array_merge($this->data, $_);
+		} else {
+			// Put the language into a sub key
+			$this->data[$key] = new Language($this->directory);
+			$this->data[$key]->load($filename);
+		}
+		
+		return $this->data;
+	}
+}