is_save_data()

Usage

PHP

nebula()->is_save_data()

Parameters

This function does not accept any parameters. Is this incorrect?

Examples

HTML

<?php if ( !nebula->is_save_data() ): ?>
    <video>
        <!-- Load "expensive" video here -->
    </video>
<?php else: ?>
    <img src="lite.jpg" /><!-- Load a smaller image instead -->
<?php endif; ?>

CSS

#hero {/* Do lots of cool stuff */}
.save-data #hero {/* Do fewer crazy things */}

Demo

No Save Data header found, normal data usage ok.

Additional Notes

A class of save-data is added to the <body> tag so that stylesheets and JavaScript can look for it too.

Source File

Located in /libs/Optimization.php on line 151.

1 Hook

Find these filters and actions in the source code below to hook into them. Use do_action() and add_filter() in your functions file or plugin.

Filters

This function has no filter hooks available. Request one?

Actions

"qm/info"
Need a new action hook? Request one here.

PHP

        public function is_save_data(){
            if ( isset($this->super->server['HTTP_SAVE_DATA']) && stristr($this->super->server['HTTP_SAVE_DATA'], 'on') !== false ){
                $this->once('is_save_data', function(){
                    do_action('qm/info', 'User prefers to save data');
                });

                return true;
            }

            return false;
        }

Override

This function can not be short-circuited with an override filter. Request one?

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