logo()

Usage

PHP

nebula()->logo()

Parameters

$location
(Optional) (String) Where the logo appears (header, footer, meta)
Default: header

Request or provide clarification »

Examples

PHP

<img class="svg" src="<?php echo nebula()->logo(); ?>" alt="<?php bloginfo('name'); ?>"/>

Override all logos with one specific file (or run your own priority/logic here)

PHP

add_filter('nebula_logo', function(){
    return get_stylesheet_directory_uri() . '/override.jpg'
});

Change the default filename this function uses to look for logos in the parent and child theme directories (default: "logo"). This example would look for "gearside.svg" and "gearside.png" in both parent and child themes per priority list below.

PHP

add_filter('nebula_logo_filename', function(){
    return 'gearside' //Note: the function will look for .svg and .png so exclude the extension here.
});

Additional Notes

This function prioritizes in the following order:

A custom function that hooks into `nebula_logo` (an image file URL is the expected return)
Customizer on sub-page when that one-color logo checkbox is selected
Customizer on home page when that one-color logo checkbox is selected
Customizer full color logo
Child theme logo (SVG or PNG)
Parent theme logo (SVG or PNG)
false if none of the above are found

Source File

Located in /libs/Functions.php on line 2166.

2 Hooks

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

"nebula_logo"
"nebula_logo_filename"
Need a new filter hook? Request one here.

Actions

This function has no action hooks available. Request one?

PHP

        public function logo($location='header'){
            $timer_name = $this->timer('Finding Appropriate Logo (' . $location . ')');

            //Allow a theme or plugin to handle the logo itself. This assumes it does its own priorities or overrides for everything!
            $hooked_logo = apply_filters('nebula_logo', false);
            if ( !empty($hooked_logo) ){
                $this->timer($timer_name, 'end');
                return $hooked_logo;
            }

            $logo = false;
            $logo_filename = apply_filters('nebula_logo_filename', 'logo'); //Allow themes and plugins to set the logo filename to use. No extension here!

            //Search the parent theme for the logo file (SVG or PNG)
            if ( file_exists(get_template_directory() . '/assets/img/' . $logo_filename . '.svg') && $location !== 'meta' ){
                $logo = get_template_directory_uri() . '/assets/img/' . $logo_filename . '.svg';
            } elseif ( file_exists(get_template_directory() . '/assets/img/' . $logo_filename . '.png') ){
                $logo = get_template_directory_uri() . '/assets/img/' . $logo_filename . '.png';
            }

            //Search the child theme for the logo file (SVG or PNG)
            if ( file_exists(get_stylesheet_directory() . '/assets/img/' . $logo_filename . '.svg') && $location !== 'meta' ){
                $logo = get_stylesheet_directory_uri() . '/assets/img/' . $logo_filename . '.svg';
            } elseif ( file_exists(get_stylesheet_directory() . '/assets/img/' . $logo_filename . '.png') ){
                $logo = get_stylesheet_directory_uri() . '/assets/img/' . $logo_filename . '.png';
            }

            //If full color Customizer logo exists
            if ( get_theme_mod('custom_logo') ){
                $logo = $this->get_thumbnail_src(get_theme_mod('custom_logo'));
            }

            //If it is the footer and the one-color logo (footer) is requested (checkbox)
            if ( $location === 'footer' && get_theme_mod('nebula_footer_single_color_logo') ){
                if ( get_theme_mod('one_color_logo') ){ //If one-color Customizer logo exists
                    $this->timer($timer_name, 'end');
                    return $this->get_thumbnail_src(get_theme_mod('one_color_logo'));
                }
            }

            //If it is the home page and the one-color logo (home) is requested (checkbox)
            if ( is_front_page() && get_theme_mod('nebula_hero_single_color_logo') && $location !== 'meta' ){
                if ( get_theme_mod('one_color_logo') ){ //If one-color Customizer logo exists
                    $this->timer($timer_name, 'end');
                    return $this->get_thumbnail_src(get_theme_mod('one_color_logo'));
                }
            }

            //If it a sub page and the one-color (sub) logo is requested (checkbox)
            if ( !is_front_page() && get_theme_mod('nebula_header_single_color_logo') && $location !== 'meta' ){
                if ( get_theme_mod('one_color_logo') ){ //If one-color Customizer logo exists
                    $this->timer($timer_name, 'end');
                    return $this->get_thumbnail_src(get_theme_mod('one_color_logo'));
                }
            }

            $this->timer($timer_name, 'end');
            return esc_url($logo);
        }

Override

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

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