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Is there a difference between the config variables $config['compress_output'] and $config['gzip_output']?

I was getting some errors with a particular add-on while having $config['compress_output']= FALSE; set in config.php. Adding $config['gzip_output'] = "n"; to config.php made the error go away.

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2 Answers 2

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It is the same setting actually. In case if you have gzip_output = y, compress_output will be = TRUE. I think it possible some legacy from EE1 (gzip_output) and and CI (compress_output)

EE_Output.php:

// Compress the output
// We simply set the ci config value to true

if ($EE->config->item('gzip_output') == 'y' AND REQ == 'PAGE')
{
    $EE->config->set_item('compress_output', TRUE);
}
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  • Very odd then. I need $config['gzip_output'] = "n"; in my config.php file to avoid an error I'm getting with a particular add-on. Having just $config['compress_output']= FALSE; without also having $config['gzip_output'] = "n"; results in an error. Deleting $config['compress_output']= FALSE; but keeping $config['gzip_output'] = "n"; also works. I wonder if it's an EE bug?
    – Chris Boerger
    Mar 18, 2013 at 20:12
  • in what add-ons have this error?
    – Max Lazar
    Mar 18, 2013 at 20:22
  • Messaging intoeetive.com/index.php/comments/messaging
    – Chris Boerger
    Mar 18, 2013 at 20:23
  • It possible that may be some add-ons can switch it. I check different version of EE and I can't find any other place where gzip_output can be setup except config.php & EE_Output.php. May be you have gzip_output = "y" somewhere in other files, like index.php. But it is odd.
    – Max Lazar
    Mar 18, 2013 at 20:29
  • Well, it's not set in index.php anywhere and I searched through the Messaging addon files and found no mention of gzip or compression. Odd.
    – Chris Boerger
    Mar 18, 2013 at 20:38
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I believe that EE requires gzip_output to be set and not compress_output. There are several places in the EE system files that are using/referencing gzip_output but make no mention of compress_output, most tellingly in Template.php. Compress_output may be limited to just CodeIgniter itself.

expressionengine/libraries/Template.php

2869        // GZip mode: {gzip_mode}
2870:       $str = str_replace(LD.'gzip_mode'.RD, ($this->EE->config->item('gzip_output') == 'y') ? $this->EE->lang->line('enabled') : $this->EE->lang->line('disabled'), $str);
2871                
2872        // App version: {version}

expressionengine/models/admin_model.php

75              'output_cfg'        =>  array(
76                  'send_headers'              => array('r', array('y' => 'yes', 'n' => 'no')),
77:                 'gzip_output'               => array('r', array('y' => 'yes', 'n' => 'no')),
78                  'force_query_string'        => array('r', array('y' => 'yes', 'n' => 'no')),
79                  'redirect_method'           => array('s', array('redirect' => 'location_method', 'refresh' => 'refresh_method')),

258                         'template_debugging'        => array('template_debugging_explanation'),
259                         'max_caches'                => array('max_caches_explanation'),
260:                        'gzip_output'               => array('gzip_output_explanation'),
261                         'server_offset'             => array('server_offset_explain'),
262                         'default_member_group'      => array('group_assignment_defaults_to_two'),
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