CI_Output
===============

Output Class

Responsible for sending final output to the browser.


* Class name: CI_Output
* Namespace: 


Properties
----------


### $final_output

    public string $final_output

Final output string


* Visibility: **public**


### $cache_expiration

    public integer $cache_expiration

Cache expiration time


* Visibility: **public**


### $headers

    public array $headers = array()

List of server headers


* Visibility: **public**


### $mimes

    public array $mimes = array()

List of mime types


* Visibility: **public**


### $mime_type

    protected string $mime_type = 'text/html'

Mime-type for the current page


* Visibility: **protected**


### $enable_profiler

    public boolean $enable_profiler = FALSE

Enable Profiler flag


* Visibility: **public**


### $_zlib_oc

    protected boolean $_zlib_oc = FALSE

php.ini zlib.output_compression flag


* Visibility: **protected**


### $_compress_output

    protected boolean $_compress_output = FALSE

CI output compression flag


* Visibility: **protected**


### $_profiler_sections

    protected array $_profiler_sections = array()

List of profiler sections


* Visibility: **protected**


### $parse_exec_vars

    public boolean $parse_exec_vars = TRUE

Parse markers flag

Whether or not to parse variables like {elapsed_time} and {memory_usage}.

* Visibility: **public**


Methods
-------


### __construct

    void CI_Output::__construct()

Class constructor

Determines whether zLib output compression will be used.

* Visibility: **public**


### get_output

    string CI_Output::get_output()

Get Output

Returns the current output string.

* Visibility: **public**


### set_output

    \CI_Output CI_Output::set_output(string $output)

Set Output

Sets the output string.

* Visibility: **public**


#### Arguments
* $output **string** - &lt;p&gt;Output data&lt;/p&gt;


### append_output

    \CI_Output CI_Output::append_output(string $output)

Append Output

Appends data onto the output string.

* Visibility: **public**


#### Arguments
* $output **string** - &lt;p&gt;Data to append&lt;/p&gt;


### set_header

    \CI_Output CI_Output::set_header(string $header, boolean $replace)

Set Header

Lets you set a server header which will be sent with the final output.

Note: If a file is cached, headers will not be sent.

* Visibility: **public**


#### Arguments
* $header **string** - &lt;p&gt;Header&lt;/p&gt;
* $replace **boolean** - &lt;p&gt;Whether to replace the old header value, if already set&lt;/p&gt;


### set_content_type

    \CI_Output CI_Output::set_content_type(string $mime_type, string $charset)

Set Content-Type Header


* Visibility: **public**


#### Arguments
* $mime_type **string** - &lt;p&gt;Extension of the file we&#039;re outputting&lt;/p&gt;
* $charset **string** - &lt;p&gt;Character set (default: NULL)&lt;/p&gt;


### get_content_type

    string CI_Output::get_content_type()

Get Current Content-Type Header


* Visibility: **public**


### get_header

    string CI_Output::get_header($header)

Get Header


* Visibility: **public**


#### Arguments
* $header **mixed**


### set_status_header

    \CI_Output CI_Output::set_status_header(integer $code, string $text)

Set HTTP Status Header

As of version 1.7.2, this is an alias for common function
set_status_header().

* Visibility: **public**


#### Arguments
* $code **integer** - &lt;p&gt;Status code (default: 200)&lt;/p&gt;
* $text **string** - &lt;p&gt;Optional message&lt;/p&gt;


### enable_profiler

    \CI_Output CI_Output::enable_profiler(boolean $val)

Enable/disable Profiler


* Visibility: **public**


#### Arguments
* $val **boolean** - &lt;p&gt;TRUE to enable or FALSE to disable&lt;/p&gt;


### set_profiler_sections

    \CI_Output CI_Output::set_profiler_sections(array $sections)

Set Profiler Sections

Allows override of default/config settings for
Profiler section display.

* Visibility: **public**


#### Arguments
* $sections **array** - &lt;p&gt;Profiler sections&lt;/p&gt;


### cache

    \CI_Output CI_Output::cache(integer $time)

Set Cache


* Visibility: **public**


#### Arguments
* $time **integer** - &lt;p&gt;Cache expiration time in seconds&lt;/p&gt;


### _display

    void CI_Output::_display(string $output)

Display Output

Processes and sends finalized output data to the browser along
with any server headers and profile data. It also stops benchmark
timers so the page rendering speed and memory usage can be shown.

Note: All "view" data is automatically put into $this->final_output
 by controller class.

* Visibility: **public**


#### Arguments
* $output **string** - &lt;p&gt;Output data override&lt;/p&gt;


### _write_cache

    void CI_Output::_write_cache(string $output)

Write Cache


* Visibility: **public**


#### Arguments
* $output **string** - &lt;p&gt;Output data to cache&lt;/p&gt;


### _display_cache

    boolean CI_Output::_display_cache($CFG, $URI)

Update/serve cached output


* Visibility: **public**


#### Arguments
* $CFG **mixed**
* $URI **mixed**


### delete_cache

    boolean CI_Output::delete_cache(string $uri)

Delete cache


* Visibility: **public**


#### Arguments
* $uri **string** - &lt;p&gt;URI string&lt;/p&gt;


### set_cache_header

    void CI_Output::set_cache_header(integer $last_modified, integer $expiration)

Set Cache Header

Set the HTTP headers to match the server-side file cache settings
in order to reduce bandwidth.

* Visibility: **public**


#### Arguments
* $last_modified **integer** - &lt;p&gt;Timestamp of when the page was last modified&lt;/p&gt;
* $expiration **integer** - &lt;p&gt;Timestamp of when should the requested page expire from cache&lt;/p&gt;