Merge CodeIgniter 3 support

1 files changed, 166 insertions, 158 deletions

diff --git a/system/libraries/Trackback.php b/system/libraries/Trackback.php
index 898553cd1..55e9a0ee6 100644
--- a/system/libraries/Trackback.php
+++ b/system/libraries/Trackback.php
@@ -1,19 +1,41 @@
-<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP
  *
- * @package		CodeIgniter
- * @author		ExpressionEngine Dev Team
- * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc.
- * @license		http://codeigniter.com/user_guide/license.html
- * @link		http://codeigniter.com
- * @since		Version 1.0
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package	CodeIgniter
+ * @author	EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright	Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license	http://opensource.org/licenses/MIT	MIT License
+ * @link	https://codeigniter.com
+ * @since	Version 1.0.0
  * @filesource
  */
-
-// ------------------------------------------------------------------------
+defined('BASEPATH') OR exit('No direct script access allowed');
 
 /**
  * Trackback Class
@@ -23,26 +45,65 @@
  * @package		CodeIgniter
  * @subpackage	Libraries
  * @category	Trackbacks
- * @author		ExpressionEngine Dev Team
- * @link		http://codeigniter.com/user_guide/libraries/trackback.html
+ * @author		EllisLab Dev Team
+ * @link		https://codeigniter.com/user_guide/libraries/trackback.html
  */
 class CI_Trackback {
 
-	var $time_format	= 'local';
-	var $charset		= 'UTF-8';
-	var $data			= array('url' => '', 'title' => '', 'excerpt' => '', 'blog_name' => '', 'charset' => '');
-	var $convert_ascii	= TRUE;
-	var $response		= '';
-	var $error_msg		= array();
+	/**
+	 * Character set
+	 *
+	 * @var	string
+	 */
+	public $charset = 'UTF-8';
+
+	/**
+	 * Trackback data
+	 *
+	 * @var	array
+	 */
+	public $data = array(
+		'url' => '',
+		'title' => '',
+		'excerpt' => '',
+		'blog_name' => '',
+		'charset' => ''
+	);
+
+	/**
+	 * Convert ASCII flag
+	 *
+	 * Whether to convert high-ASCII and MS Word
+	 * characters to HTML entities.
+	 *
+	 * @var	bool
+	 */
+	public $convert_ascii = TRUE;
+
+	/**
+	 * Response
+	 *
+	 * @var	string
+	 */
+	public $response = '';
+
+	/**
+	 * Error messages list
+	 *
+	 * @var	string[]
+	 */
+	public $error_msg = array();
+
+	// --------------------------------------------------------------------
 
 	/**
 	 * Constructor
 	 *
-	 * @access	public
+	 * @return	void
 	 */
 	public function __construct()
 	{
-		log_message('debug', "Trackback Class Initialized");
+		log_message('info', 'Trackback Class Initialized');
 	}
 
 	// --------------------------------------------------------------------
@@ -50,11 +111,10 @@ class CI_Trackback {
 	/**
 	 * Send Trackback
 	 *
-	 * @access	public
 	 * @param	array
 	 * @return	bool
 	 */
-	function send($tb_data)
+	public function send($tb_data)
 	{
 		if ( ! is_array($tb_data))
 		{
@@ -73,38 +133,32 @@ class CI_Trackback {
 
 			switch ($item)
 			{
-				case 'ping_url'	: $$item = $this->extract_urls($tb_data[$item]);
+				case 'ping_url':
+					$$item = $this->extract_urls($tb_data[$item]);
 					break;
-				case 'excerpt'	: $$item = $this->limit_characters($this->convert_xml(strip_tags(stripslashes($tb_data[$item]))));
+				case 'excerpt':
+					$$item = $this->limit_characters($this->convert_xml(strip_tags(stripslashes($tb_data[$item]))));
 					break;
-				case 'url'		: $$item = str_replace('&#45;', '-', $this->convert_xml(strip_tags(stripslashes($tb_data[$item]))));
+				case 'url':
+					$$item = str_replace('&#45;', '-', $this->convert_xml(strip_tags(stripslashes($tb_data[$item]))));
 					break;
-				default			: $$item = $this->convert_xml(strip_tags(stripslashes($tb_data[$item])));
+				default:
+					$$item = $this->convert_xml(strip_tags(stripslashes($tb_data[$item])));
 					break;
 			}
 
 			// Convert High ASCII Characters
-			if ($this->convert_ascii == TRUE)
+			if ($this->convert_ascii === TRUE && in_array($item, array('excerpt', 'title', 'blog_name'), TRUE))
 			{
-				if ($item == 'excerpt')
-				{
-					$$item = $this->convert_ascii($$item);
-				}
-				elseif ($item == 'title')
-				{
-					$$item = $this->convert_ascii($$item);
-				}
-				elseif ($item == 'blog_name')
-				{
-					$$item = $this->convert_ascii($$item);
-				}
+				$$item = $this->convert_ascii($$item);
 			}
 		}
 
 		// Build the Trackback data string
-		$charset = ( ! isset($tb_data['charset'])) ? $this->charset : $tb_data['charset'];
+		$charset = isset($tb_data['charset']) ? $tb_data['charset'] : $this->charset;
 
-		$data = "url=".rawurlencode($url)."&title=".rawurlencode($title)."&blog_name=".rawurlencode($blog_name)."&excerpt=".rawurlencode($excerpt)."&charset=".rawurlencode($charset);
+		$data = 'url='.rawurlencode($url).'&title='.rawurlencode($title).'&blog_name='.rawurlencode($blog_name)
+			.'&excerpt='.rawurlencode($excerpt).'&charset='.rawurlencode($charset);
 
 		// Send Trackback(s)
 		$return = TRUE;
@@ -112,7 +166,7 @@ class CI_Trackback {
 		{
 			foreach ($ping_url as $url)
 			{
-				if ($this->process($url, $data) == FALSE)
+				if ($this->process($url, $data) === FALSE)
 				{
 					$return = FALSE;
 				}
@@ -132,29 +186,35 @@ class CI_Trackback {
 	 * If the data is valid it is set to the $this->data array
 	 * so that it can be inserted into a database.
 	 *
-	 * @access	public
 	 * @return	bool
 	 */
-	function receive()
+	public function receive()
 	{
 		foreach (array('url', 'title', 'blog_name', 'excerpt') as $val)
 		{
-			if ( ! isset($_POST[$val]) OR $_POST[$val] == '')
+			if (empty($_POST[$val]))
 			{
 				$this->set_error('The following required POST variable is missing: '.$val);
 				return FALSE;
 			}
 
-			$this->data['charset'] = ( ! isset($_POST['charset'])) ? 'auto' : strtoupper(trim($_POST['charset']));
+			$this->data['charset'] = isset($_POST['charset']) ? strtoupper(trim($_POST['charset'])) : 'auto';
 
-			if ($val != 'url' && function_exists('mb_convert_encoding'))
+			if ($val !== 'url' && MB_ENABLED === TRUE)
 			{
-				$_POST[$val] = mb_convert_encoding($_POST[$val], $this->charset, $this->data['charset']);
+				if (MB_ENABLED === TRUE)
+				{
+					$_POST[$val] = mb_convert_encoding($_POST[$val], $this->charset, $this->data['charset']);
+				}
+				elseif (ICONV_ENABLED === TRUE)
+				{
+					$_POST[$val] = @iconv($this->data['charset'], $this->charset.'//IGNORE', $_POST[$val]);
+				}
 			}
 
-			$_POST[$val] = ($val != 'url') ? $this->convert_xml(strip_tags($_POST[$val])) : strip_tags($_POST[$val]);
+			$_POST[$val] = ($val !== 'url') ? $this->convert_xml(strip_tags($_POST[$val])) : strip_tags($_POST[$val]);
 
-			if ($val == 'excerpt')
+			if ($val === 'excerpt')
 			{
 				$_POST['excerpt'] = $this->limit_characters($_POST['excerpt']);
 			}
@@ -170,18 +230,16 @@ class CI_Trackback {
 	/**
 	 * Send Trackback Error Message
 	 *
-	 * Allows custom errors to be set.  By default it
+	 * Allows custom errors to be set. By default it
 	 * sends the "incomplete information" error, as that's
 	 * the most common one.
 	 *
-	 * @access	public
 	 * @param	string
 	 * @return	void
 	 */
-	function send_error($message = 'Incomplete Information')
+	public function send_error($message = 'Incomplete Information')
 	{
-		echo "<?xml version=\"1.0\" encoding=\"utf-8\"?".">\n<response>\n<error>1</error>\n<message>".$message."</message>\n</response>";
-		exit;
+		exit('<?xml version="1.0" encoding="utf-8"?'.">\n<response>\n<error>1</error>\n<message>".$message."</message>\n</response>");
 	}
 
 	// --------------------------------------------------------------------
@@ -192,13 +250,11 @@ class CI_Trackback {
 	 * This should be called when a trackback has been
 	 * successfully received and inserted.
 	 *
-	 * @access	public
 	 * @return	void
 	 */
-	function send_success()
+	public function send_success()
 	{
-		echo "<?xml version=\"1.0\" encoding=\"utf-8\"?".">\n<response>\n<error>0</error>\n</response>";
-		exit;
+		exit('<?xml version="1.0" encoding="utf-8"?'.">\n<response>\n<error>0</error>\n</response>");
 	}
 
 	// --------------------------------------------------------------------
@@ -206,13 +262,12 @@ class CI_Trackback {
 	/**
 	 * Fetch a particular item
 	 *
-	 * @access	public
 	 * @param	string
 	 * @return	string
 	 */
-	function data($item)
+	public function data($item)
 	{
-		return ( ! isset($this->data[$item])) ? '' : $this->data[$item];
+		return isset($this->data[$item]) ? $this->data[$item] : '';
 	}
 
 	// --------------------------------------------------------------------
@@ -221,14 +276,13 @@ class CI_Trackback {
 	 * Process Trackback
 	 *
 	 * Opens a socket connection and passes the data to
-	 * the server.  Returns TRUE on success, FALSE on failure
+	 * the server. Returns TRUE on success, FALSE on failure
 	 *
-	 * @access	public
 	 * @param	string
 	 * @param	string
 	 * @return	bool
 	 */
-	function process($url, $data)
+	public function process($url, $data)
 	{
 		$target = parse_url($url);
 
@@ -240,43 +294,37 @@ class CI_Trackback {
 		}
 
 		// Build the path
-		$ppath = ( ! isset($target['path'])) ? $url : $target['path'];
-
-		$path = (isset($target['query']) && $target['query'] != "") ? $ppath.'?'.$target['query'] : $ppath;
+		$path = isset($target['path']) ? $target['path'] : $url;
+		empty($target['query']) OR $path .= '?'.$target['query'];
 
 		// Add the Trackback ID to the data string
 		if ($id = $this->get_id($url))
 		{
-			$data = "tb_id=".$id."&".$data;
+			$data = 'tb_id='.$id.'&'.$data;
 		}
 
 		// Transfer the data
-		fputs ($fp, "POST " . $path . " HTTP/1.0\r\n" );
-		fputs ($fp, "Host: " . $target['host'] . "\r\n" );
-		fputs ($fp, "Content-type: application/x-www-form-urlencoded\r\n" );
-		fputs ($fp, "Content-length: " . strlen($data) . "\r\n" );
-		fputs ($fp, "Connection: close\r\n\r\n" );
-		fputs ($fp, $data);
+		fputs($fp, 'POST '.$path." HTTP/1.0\r\n");
+		fputs($fp, 'Host: '.$target['host']."\r\n");
+		fputs($fp, "Content-type: application/x-www-form-urlencoded\r\n");
+		fputs($fp, 'Content-length: '.strlen($data)."\r\n");
+		fputs($fp, "Connection: close\r\n\r\n");
+		fputs($fp, $data);
 
 		// Was it successful?
-		$this->response = "";
 
+		$this->response = '';
 		while ( ! feof($fp))
 		{
 			$this->response .= fgets($fp, 128);
 		}
 		@fclose($fp);
 
-
-		if (stristr($this->response, '<error>0</error>') === FALSE)
+		if (stripos($this->response, '<error>0</error>') === FALSE)
 		{
-			$message = 'An unknown error was encountered';
-
-			if (preg_match("/<message>(.*?)<\/message>/is", $this->response, $match))
-			{
-				$message = trim($match['1']);
-			}
-
+			$message = preg_match('/<message>(.*?)<\/message>/is', $this->response, $match)
+				? trim($match[1])
+				: 'An unknown error was encountered';
 			$this->set_error($message);
 			return FALSE;
 		}
@@ -293,32 +341,18 @@ class CI_Trackback {
 	 * It takes a string of URLs (separated by comma or
 	 * space) and puts each URL into an array
 	 *
-	 * @access	public
 	 * @param	string
 	 * @return	string
 	 */
-	function extract_urls($urls)
+	public function extract_urls($urls)
 	{
-		// Remove the pesky white space and replace with a comma.
-		$urls = preg_replace("/\s*(\S+)\s*/", "\\1,", $urls);
-
-		// If they use commas get rid of the doubles.
-		$urls = str_replace(",,", ",", $urls);
-
-		// Remove any comma that might be at the end
-		if (substr($urls, -1) == ",")
-		{
-			$urls = substr($urls, 0, -1);
-		}
-
-		// Break into an array via commas
-		$urls = preg_split('/[,]/', $urls);
+		// Remove the pesky white space and replace with a comma, then replace doubles.
+		$urls = str_replace(',,', ',', preg_replace('/\s*(\S+)\s*/', '\\1,', $urls));
 
-		// Removes duplicates
-		$urls = array_unique($urls);
+		// Break into an array via commas and remove duplicates
+		$urls = array_unique(preg_split('/[,]/', rtrim($urls, ',')));
 
 		array_walk($urls, array($this, 'validate_url'));
-
 		return $urls;
 	}
 
@@ -329,17 +363,16 @@ class CI_Trackback {
 	 *
 	 * Simply adds "http://" if missing
 	 *
-	 * @access	public
 	 * @param	string
-	 * @return	string
+	 * @return	void
 	 */
-	function validate_url($url)
+	public function validate_url(&$url)
 	{
 		$url = trim($url);
 
-		if (substr($url, 0, 4) != "http")
+		if (stripos($url, 'http') !== 0)
 		{
-			$url = "http://".$url;
+			$url = 'http://'.$url;
 		}
 	}
 
@@ -348,13 +381,12 @@ class CI_Trackback {
 	/**
 	 * Find the Trackback URL's ID
 	 *
-	 * @access	public
 	 * @param	string
 	 * @return	string
 	 */
-	function get_id($url)
+	public function get_id($url)
 	{
-		$tb_id = "";
+		$tb_id = '';
 
 		if (strpos($url, '?') !== FALSE)
 		{
@@ -378,18 +410,11 @@ class CI_Trackback {
 
 			if ( ! is_numeric($tb_id))
 			{
-				$tb_id  = $tb_array[count($tb_array)-2];
+				$tb_id = $tb_array[count($tb_array)-2];
 			}
 		}
 
-		if ( ! preg_match ("/^([0-9]+)$/", $tb_id))
-		{
-			return FALSE;
-		}
-		else
-		{
-			return $tb_id;
-		}
+		return ctype_digit((string) $tb_id) ? $tb_id : FALSE;
 	}
 
 	// --------------------------------------------------------------------
@@ -397,25 +422,20 @@ class CI_Trackback {
 	/**
 	 * Convert Reserved XML characters to Entities
 	 *
-	 * @access	public
 	 * @param	string
 	 * @return	string
 	 */
-	function convert_xml($str)
+	public function convert_xml($str)
 	{
 		$temp = '__TEMP_AMPERSANDS__';
 
-		$str = preg_replace("/&#(\d+);/", "$temp\\1;", $str);
-		$str = preg_replace("/&(\w+);/",  "$temp\\1;", $str);
-
-		$str = str_replace(array("&","<",">","\"", "'", "-"),
-							array("&amp;", "&lt;", "&gt;", "&quot;", "&#39;", "&#45;"),
-							$str);
+		$str = preg_replace(array('/&#(\d+);/', '/&(\w+);/'), $temp.'\\1;', $str);
 
-		$str = preg_replace("/$temp(\d+);/","&#\\1;",$str);
-		$str = preg_replace("/$temp(\w+);/","&\\1;", $str);
+		$str = str_replace(array('&', '<', '>', '"', "'", '-'),
+					array('&amp;', '&lt;', '&gt;', '&quot;', '&#39;', '&#45;'),
+					$str);
 
-		return $str;
+		return preg_replace(array('/'.$temp.'(\d+);/', '/'.$temp.'(\w+);/'), array('&#\\1;', '&\\1;'), $str);
 	}
 
 	// --------------------------------------------------------------------
@@ -425,33 +445,32 @@ class CI_Trackback {
 	 *
 	 * Limits the string based on the character count. Will preserve complete words.
 	 *
-	 * @access	public
 	 * @param	string
-	 * @param	integer
+	 * @param	int
 	 * @param	string
 	 * @return	string
 	 */
-	function limit_characters($str, $n = 500, $end_char = '&#8230;')
+	public function limit_characters($str, $n = 500, $end_char = '&#8230;')
 	{
 		if (strlen($str) < $n)
 		{
 			return $str;
 		}
 
-		$str = preg_replace("/\s+/", ' ', str_replace(array("\r\n", "\r", "\n"), ' ', $str));
+		$str = preg_replace('/\s+/', ' ', str_replace(array("\r\n", "\r", "\n"), ' ', $str));
 
 		if (strlen($str) <= $n)
 		{
 			return $str;
 		}
 
-		$out = "";
+		$out = '';
 		foreach (explode(' ', trim($str)) as $val)
 		{
 			$out .= $val.' ';
 			if (strlen($out) >= $n)
 			{
-				return trim($out).$end_char;
+				return rtrim($out).$end_char;
 			}
 		}
 	}
@@ -464,11 +483,10 @@ class CI_Trackback {
 	 * Converts Hight ascii text and MS Word special chars
 	 * to character entities
 	 *
-	 * @access	public
 	 * @param	string
 	 * @return	string
 	 */
-	function convert_ascii($str)
+	public function convert_ascii($str)
 	{
 		$count	= 1;
 		$out	= '';
@@ -484,16 +502,18 @@ class CI_Trackback {
 			}
 			else
 			{
-				if (count($temp) == 0)
+				if (count($temp) === 0)
 				{
 					$count = ($ordinal < 224) ? 2 : 3;
 				}
 
 				$temp[] = $ordinal;
 
-				if (count($temp) == $count)
+				if (count($temp) === $count)
 				{
-					$number = ($count == 3) ? (($temp['0'] % 16) * 4096) + (($temp['1'] % 64) * 64) + ($temp['2'] % 64) : (($temp['0'] % 32) * 64) + ($temp['1'] % 64);
+					$number = ($count === 3)
+						? (($temp[0] % 16) * 4096) + (($temp[1] % 64) * 64) + ($temp[2] % 64)
+						: (($temp[0] % 32) * 64) + ($temp[1] % 64);
 
 					$out .= '&#'.$number.';';
 					$count = 1;
@@ -510,11 +530,10 @@ class CI_Trackback {
 	/**
 	 * Set error message
 	 *
-	 * @access	public
 	 * @param	string
 	 * @return	void
 	 */
-	function set_error($msg)
+	public function set_error($msg)
 	{
 		log_message('error', $msg);
 		$this->error_msg[] = $msg;
@@ -525,24 +544,13 @@ class CI_Trackback {
 	/**
 	 * Show error messages
 	 *
-	 * @access	public
 	 * @param	string
 	 * @param	string
 	 * @return	string
 	 */
-	function display_errors($open = '<p>', $close = '</p>')
+	public function display_errors($open = '<p>', $close = '</p>')
 	{
-		$str = '';
-		foreach ($this->error_msg as $val)
-		{
-			$str .= $open.$val.$close;
-		}
-
-		return $str;
+		return (count($this->error_msg) > 0) ? $open.implode($close.$open, $this->error_msg).$close : '';
 	}
 
 }
-// END Trackback Class
-
-/* End of file Trackback.php */
-/* Location: ./system/libraries/Trackback.php */
\ No newline at end of file