[ci skip] 3.1.9 release

1 files changed, 0 insertions, 233 deletions

diff --git a/user_guide_src/source/libraries/output.rst b/user_guide_src/source/libraries/output.rst
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-############
-Output Class
-############
-
-The Output class is a core class with one main function: To send the
-finalized web page to the requesting browser. It is also responsible for
-:doc:`caching <../general/caching>` your web pages, if you use that
-feature.
-
-.. note:: This class is initialized automatically by the system so there
-	is no need to do it manually.
-
-Under normal circumstances you won't even notice the Output class since
-it works transparently without your intervention. For example, when you
-use the :doc:`Loader <../libraries/loader>` class to load a view file,
-it's automatically passed to the Output class, which will be called
-automatically by CodeIgniter at the end of system execution. It is
-possible, however, for you to manually intervene with the output if you
-need to.
-
-.. contents::
-  :local:
-
-.. raw:: html
-
-  <div class="custom-index container"></div>
-
-***************
-Class Reference
-***************
-
-.. php:class:: CI_Output
-
-	.. attribute:: $parse_exec_vars = TRUE;
-
-		Enables/disables parsing of the {elapsed_time} and {memory_usage} pseudo-variables.
-
-		CodeIgniter will parse those tokens in your output by default. To disable this, set
-		this property to FALSE in your controller.
-		::
-
-			$this->output->parse_exec_vars = FALSE;
-
-	.. php:method:: set_output($output)
-
-		:param	string	$output: String to set the output to
-		:returns:	CI_Output instance (method chaining)
-		:rtype:	CI_Output
-
-		Permits you to manually set the final output string. Usage example::
-
-			$this->output->set_output($data);
-
-		.. important:: If you do set your output manually, it must be the last thing done
-			in the function you call it from. For example, if you build a page in one
-			of your controller methods, don't set the output until the end.
-
-	.. php:method:: set_content_type($mime_type[, $charset = NULL])
-
-		:param	string	$mime_type: MIME Type idenitifer string
-		:param	string	$charset: Character set
-		:returns:	CI_Output instance (method chaining)
-		:rtype:	CI_Output
-
-		Permits you to set the mime-type of your page so you can serve JSON data, JPEG's, XML, etc easily.
-		::
-
-			$this->output
-				->set_content_type('application/json')
-				->set_output(json_encode(array('foo' => 'bar')));
-
-			$this->output
-				->set_content_type('jpeg') // You could also use ".jpeg" which will have the full stop removed before looking in config/mimes.php
-				->set_output(file_get_contents('files/something.jpg'));
-
-		.. important:: Make sure any non-mime string you pass to this method
-			exists in *application/config/mimes.php* or it will have no effect.
-
-		You can also set the character set of the document, by passing a second argument::
-
-			$this->output->set_content_type('css', 'utf-8');
-
-	.. php:method:: get_content_type()
-
-		:returns:	Content-Type string
-		:rtype:	string
-
-		Returns the Content-Type HTTP header that's currently in use, excluding the character set value.
-		::
-
-			$mime = $this->output->get_content_type();
-
-		.. note:: If not set, the default return value is 'text/html'.
-
-	.. php:method:: get_header($header)
-
-		:param	string	$header: HTTP header name
-		:returns:	HTTP response header or NULL if not found
-		:rtype:	mixed
-
-		Returns the requested HTTP header value, or NULL if the requested header is not set.
-		Example::
-
-			$this->output->set_content_type('text/plain', 'UTF-8');
-			echo $this->output->get_header('content-type');
-			// Outputs: text/plain; charset=utf-8
-
-		.. note:: The header name is compared in a case-insensitive manner.
-
-		.. note:: Raw headers sent via PHP's native ``header()`` function are also detected.
-
-	.. php:method:: get_output()
-
-		:returns:	Output string
-		:rtype:	string
-
-		Permits you to manually retrieve any output that has been sent for
-		storage in the output class. Usage example::
-
-			$string = $this->output->get_output();
-
-		Note that data will only be retrievable from this function if it has
-		been previously sent to the output class by one of the CodeIgniter
-		functions like ``$this->load->view()``.
-
-	.. php:method:: append_output($output)
-
-		:param	string	$output: Additional output data to append
-		:returns:	CI_Output instance (method chaining)
-		:rtype:	CI_Output
-
-		Appends data onto the output string.
-		::
-
-			$this->output->append_output($data);
-
-	.. php:method:: set_header($header[, $replace = TRUE])
-
-		:param	string	$header: HTTP response header
-		:param	bool	$replace: Whether to replace the old header value, if it is already set
-		:returns:	CI_Output instance (method chaining)
-		:rtype:	CI_Output
-
-		Permits you to manually set server headers, which the output class will
-		send for you when outputting the final rendered display. Example::
-
-			$this->output->set_header('HTTP/1.0 200 OK');
-			$this->output->set_header('HTTP/1.1 200 OK');
-			$this->output->set_header('Last-Modified: '.gmdate('D, d M Y H:i:s', $last_update).' GMT');
-			$this->output->set_header('Cache-Control: no-store, no-cache, must-revalidate');
-			$this->output->set_header('Cache-Control: post-check=0, pre-check=0');
-			$this->output->set_header('Pragma: no-cache');
-
-	.. php:method:: set_status_header([$code = 200[, $text = '']])
-
-		:param	int	$code: HTTP status code
-		:param	string	$text: Optional message
-		:returns:	CI_Output instance (method chaining)
-		:rtype:	CI_Output
-
-		Permits you to manually set a server status header. Example::
-
-			$this->output->set_status_header(401);
-			// Sets the header as:  Unauthorized
-
-		`See here <http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html>`_ for a full list of headers.
-
-		.. note:: This method is an alias for :doc:`Common function <../general/common_functions>`
-			:func:`set_status_header()`.
-
-	.. php:method:: enable_profiler([$val = TRUE])
-
-		:param	bool	$val: Whether to enable or disable the Profiler
-		:returns:	CI_Output instance (method chaining)
-		:rtype:	CI_Output
-
-		Permits you to enable/disable the :doc:`Profiler <../general/profiling>`, which will display benchmark
-		and other data at the bottom of your pages for debugging and optimization purposes.
-
-		To enable the profiler place the following line anywhere within your
-		:doc:`Controller <../general/controllers>` methods::
-
-			$this->output->enable_profiler(TRUE);
-
-		When enabled a report will be generated and inserted at the bottom of your pages.
-
-		To disable the profiler you would use::
-
-			$this->output->enable_profiler(FALSE);
-
-	.. php:method:: set_profiler_sections($sections)
-
-		:param	array	$sections: Profiler sections
-		:returns:	CI_Output instance (method chaining)
-		:rtype:	CI_Output
-
-		Permits you to enable/disable specific sections of the Profiler when it is enabled.
-		Please refer to the :doc:`Profiler <../general/profiling>` documentation for further information.
-
-	.. php:method:: cache($time)
-
-		:param	int	$time: Cache expiration time in minutes
-		:returns:	CI_Output instance (method chaining)
-		:rtype:	CI_Output
-
-		Caches the current page for the specified amount of minutes.
-
-		For more information, please see the :doc:`caching documentation <../general/caching>`.
-
-	.. php:method:: _display([$output = ''])
-
-		:param	string	$output: Output data override
-		:returns:	void
-		:rtype:	void
-
-		Sends finalized output data to the browser along with any server headers. It also stops benchmark
-		timers.
-
-		.. note:: This method is called automatically at the end of script execution, you won't need to 
-			call it manually unless you are aborting script execution using ``exit()`` or ``die()`` in your code.
-		
-		Example::
-
-			$response = array('status' => 'OK');
-
-			$this->output
-				->set_status_header(200)
-				->set_content_type('application/json', 'utf-8')
-				->set_output(json_encode($response, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES))
-				->_display();
-			exit;
-
-		.. note:: Calling this method manually without aborting script execution will result in duplicated output.