PHP codes in HTML

<?php
/**
*
* @package phpBB3
* @version $Id: template.php,v 1.116 2007/10/04 12:02:03 acydburn Exp $
* @copyright (c) 2005 phpBB Group, sections (c) 2001 ispi of Lincoln Inc
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
*
*/

/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
	exit;
}

/**
* Base Template class.
* @package phpBB3
*/
class template
{
	/** variable that holds all the data we'll be substituting into
	* the compiled templates. Takes form:
	* --> $this->_tpldata[block][iteration#][child][iteration#][child2][iteration#][variablename] == value
	* if it's a root-level variable, it'll be like this:
	* --> $this->_tpldata[.][0][varname] == value
	*/
	var $_tpldata = array('.' => array(0 => array()));
	var $_rootref;

	// Root dir and hash of filenames for each template handle.
	var $root = '';
	var $cachepath = '';
	var $files = array();
	var $filename = array();

	// this will hash handle names to the compiled/uncompiled code for that handle.
	var $compiled_code = array();

	/**
	* Set template location
	* @access public
	*/
	function set_template()
	{
		global $phpbb_root_path, $user;

		if (file_exists($phpbb_root_path . 'styles/' . $user->theme['template_path'] . '/template'))
		{
			$this->root = $phpbb_root_path . 'styles/' . $user->theme['template_path'] . '/template';
			$this->cachepath = $phpbb_root_path . 'cache/tpl_' . $user->theme['template_path'] . '_';
		}
		else
		{
			trigger_error('Template path could not be found: styles/' . $user->theme['template_path'] . '/template', E_USER_ERROR);
		}

		$this->_rootref = &$this->_tpldata['.'][0];

		return true;
	}

	/**
	* Set custom template location (able to use directory outside of phpBB)
	* @access public
	*/
	function set_custom_template($template_path, $template_name)
	{
		global $phpbb_root_path;

		$this->root = $template_path;
		$this->cachepath = $phpbb_root_path . 'cache/ctpl_' . $template_name . '_';

		return true;
	}

	/**
	* Sets the template filenames for handles. $filename_array
	* should be a hash of handle => filename pairs.
	* @access public
	*/
	function set_filenames($filename_array)
	{
		if (!is_array($filename_array))
		{
			return false;
		}

		foreach ($filename_array as $handle => $filename)
		{
			if (empty($filename))
			{
				trigger_error("template->set_filenames: Empty filename specified for $handle", E_USER_ERROR);
			}

			$this->filename[$handle] = $filename;
			$this->files[$handle] = $this->root . '/' . $filename;
		}

		return true;
	}

	/**
	* Destroy template data set
	* @access public
	*/
	function destroy()
	{
		$this->_tpldata = array('.' => array(0 => array()));
	}

	/**
	* Reset/empty complete block
	* @access public
	*/
	function destroy_block_vars($blockname)
	{
		if (strpos($blockname, '.') !== false)
		{
			// Nested block.
			$blocks = explode('.', $blockname);
			$blockcount = sizeof($blocks) - 1;

			$str = &$this->_tpldata;
			for ($i = 0; $i < $blockcount; $i++)
			{
				$str = &$str[$blocks[$i]];
				$str = &$str[sizeof($str) - 1];
			}

			unset($str[$blocks[$blockcount]]);
		}
		else
		{
			// Top-level block.
			unset($this->_tpldata[$blockname]);
		}

		return true;
	}

	/**
	* Display handle
	* @access public
	*/
	function display($handle, $include_once = true)
	{
		global $user, $phpbb_hook;

		if (!empty($phpbb_hook) && $phpbb_hook->call_hook(array(__CLASS__, __FUNCTION__), $handle, $include_once))
		{
			if ($phpbb_hook->hook_return(array(__CLASS__, __FUNCTION__)))
			{
				return $phpbb_hook->hook_return_result(array(__CLASS__, __FUNCTION__));
			}
		}

		if (defined('IN_ERROR_HANDLER'))
		{
			if ((E_NOTICE & error_reporting()) == E_NOTICE)
			{
				error_reporting(error_reporting() ^ E_NOTICE);
			}
		}

		if ($filename = $this->_tpl_load($handle))
		{
			($include_once) ? include_once($filename) : include($filename);
		}
		else
		{
			eval(' ?>' . $this->compiled_code[$handle] . '<?php ');
		}

		return true;
	}

	/**
	* Display the handle and assign the output to a template variable or return the compiled result.
	* @access public
	*/
	function assign_display($handle, $template_var = '', $return_content = true, $include_once = false)
	{
		ob_start();
		$this->display($handle, $include_once);
		$contents = ob_get_clean();

		if ($return_content)
		{
			return $contents;
		}

		$this->assign_var($template_var, $contents);

		return true;
	}

	/**
	* Load a compiled template if possible, if not, recompile it
	* @access private
	*/
	function _tpl_load(&$handle)
	{
		global $user, $phpEx, $config;

		$filename = $this->cachepath . str_replace('/', '.', $this->filename[$handle]) . '.' . $phpEx;

		$recompile = (($config['load_tplcompile'] && @filemtime($filename) < filemtime($this->files[$handle])) || !file_exists($filename) || @filesize($filename) === 0) ? true : false;

		// Recompile page if the original template is newer, otherwise load the compiled version
		if (!$recompile)
		{
			return $filename;
		}

		global $db, $phpbb_root_path;

		if (!class_exists('template_compile'))
		{
			include($phpbb_root_path . 'includes/functions_template.' . $phpEx);
		}

		$compile = new template_compile($this);

		// If we don't have a file assigned to this handle, die.
		if (!isset($this->files[$handle]))
		{
			trigger_error("template->_tpl_load(): No file specified for handle $handle", E_USER_ERROR);
		}

		// Just compile if no user object is present (happens within the installer)
		if (!$user)
		{
			$compile->_tpl_load_file($handle);
			return false;
		}

		if (isset($user->theme['template_storedb']) && $user->theme['template_storedb'])
		{
			$sql = 'SELECT *
				FROM ' . STYLES_TEMPLATE_DATA_TABLE . '
				WHERE template_id = ' . $user->theme['template_id'] . "
					AND (template_filename = '" . $db->sql_escape($this->filename[$handle]) . "'
						OR template_included " . $db->sql_like_expression($db->any_char . $this->filename[$handle] . ':' . $db->any_char) . ')';
			$result = $db->sql_query($sql);
			$row = $db->sql_fetchrow($result);

			if ($row)
			{
				do
				{
					if ($row['template_mtime'] < filemtime($phpbb_root_path . 'styles/' . $user->theme['template_path'] . '/template/' . $row['template_filename']))
					{
						if ($row['template_filename'] == $this->filename[$handle])
						{
							$compile->_tpl_load_file($handle);
						}
						else
						{
							$this->files[$row['template_filename']] = $this->root . '/' . $row['template_filename'];
							$compile->_tpl_load_file($row['template_filename']);
							unset($this->compiled_code[$row['template_filename']]);
							unset($this->files[$row['template_filename']]);
							unset($this->filename[$row['template_filename']]);
						}
					}

					if ($row['template_filename'] == $this->filename[$handle])
					{
						$this->compiled_code[$handle] = $compile->compile(trim($row['template_data']));
						$compile->compile_write($handle, $this->compiled_code[$handle]);
					}
					else
					{
						// Only bother compiling if it doesn't already exist
						if (!file_exists($this->cachepath . str_replace('/', '.', $row['template_filename']) . '.' . $phpEx))
						{
							$this->filename[$row['template_filename']] = $row['template_filename'];
							$compile->compile_write($row['template_filename'], $compile->compile(trim($row['template_data'])));
							unset($this->filename[$row['template_filename']]);
						}
					}
				}
				while ($row = $db->sql_fetchrow($result));
			}
			else
			{
				// Try to load from filesystem and instruct to insert into the styles table...
				$compile->_tpl_load_file($handle, true);
				return false;
			}
			$db->sql_freeresult($result);

			return false;
		}

		$compile->_tpl_load_file($handle);
		return false;
	}

	/**
	* Assign key variable pairs from an array
	* @access public
	*/
	function assign_vars($vararray)
	{
		foreach ($vararray as $key => $val)
		{
			$this->_rootref[$key] = $val;
		}

		return true;
	}

	/**
	* Assign a single variable to a single key
	* @access public
	*/
	function assign_var($varname, $varval)
	{
		$this->_rootref[$varname] = $varval;

		return true;
	}

	/**
	* Assign key variable pairs from an array to a specified block
	* @access public
	*/
	function assign_block_vars($blockname, $vararray)
	{
		if (strpos($blockname, '.') !== false)
		{
			// Nested block.
			$blocks = explode('.', $blockname);
			$blockcount = sizeof($blocks) - 1;

			$str = &$this->_tpldata;
			for ($i = 0; $i < $blockcount; $i++)
			{
				$str = &$str[$blocks[$i]];
				$str = &$str[sizeof($str) - 1];
			}

			$s_row_count = isset($str[$blocks[$blockcount]]) ? sizeof($str[$blocks[$blockcount]]) : 0;
			$vararray['S_ROW_COUNT'] = $s_row_count;

			// Assign S_FIRST_ROW
			if (!$s_row_count)
			{
				$vararray['S_FIRST_ROW'] = true;
			}

			// Now the tricky part, we always assign S_LAST_ROW and remove the entry before
			// This is much more clever than going through the complete template data on display (phew)
			$vararray['S_LAST_ROW'] = true;
			if ($s_row_count > 0)
			{
				unset($str[$blocks[$blockcount]][($s_row_count - 1)]['S_LAST_ROW']);
			}

			// Now we add the block that we're actually assigning to.
			// We're adding a new iteration to this block with the given
			// variable assignments.
			$str[$blocks[$blockcount]][] = $vararray;
		}
		else
		{
			// Top-level block.
			$s_row_count = (isset($this->_tpldata[$blockname])) ? sizeof($this->_tpldata[$blockname]) : 0;
			$vararray['S_ROW_COUNT'] = $s_row_count;

			// Assign S_FIRST_ROW
			if (!$s_row_count)
			{
				$vararray['S_FIRST_ROW'] = true;
			}

			// We always assign S_LAST_ROW and remove the entry before
			$vararray['S_LAST_ROW'] = true;
			if ($s_row_count > 0)
			{
				unset($this->_tpldata[$blockname][($s_row_count - 1)]['S_LAST_ROW']);
			}
			
			// Add a new iteration to this block with the variable assignments we were given.
			$this->_tpldata[$blockname][] = $vararray;
		}

		return true;
	}

	/**
	* Change already assigned key variable pair (one-dimensional - single loop entry)
	*
	* An example of how to use this function:
	* {@example alter_block_array.php}
	*
	* @param	string	$blockname	the blockname, for example 'loop'
	* @param	array	$vararray	the var array to insert/add or merge
	* @param	mixed	$key		Key to search