has_custom_logo() │ WP 4.5.0

Checks if a logo is set for the site.

Works only if the theme supports custom-logo. Support is enabled via add_theme_support( 'custom-logo' ).

Convenient before calling the_custom_logo() to avoid getting an empty output.

Use get_theme_mod( 'custom_logo' ) to get the logo ID.

Uses: get_theme_mod()
1 time — 0.000037 sec (very fast) | 50000 times — 0.59 sec (very fast) | PHP 7.0.5, WP 4.5

No Hooks.

Returns

true|false. Whether a logo is set or not.

Usage

if( has_custom_logo( $blog_id ) ){
	// logo exists
}
$blog_id(int)
ID of the site/blog for which to check the presence of a logo.
Default: 0 (current blog)

Examples

0

#1 Check if the logo is specified for the site 

if( has_custom_logo() ){
	// we have a logo, display it
	echo get_custom_logo();
}
0

#2 Using get_custom_logo()

Let's check if a logo is set for the site and immediately display it.

if( $logo = get_custom_logo() ){
	echo $logo;
}

See also:

Changelog

Since 4.5.0 Introduced.

has_custom_logo() code WP 7.0

wp-includes/general-template.php 
function has_custom_logo( $blog_id = 0 ) {
	$switched_blog = false;

	if ( is_multisite() && ! empty( $blog_id ) && get_current_blog_id() !== (int) $blog_id ) {
		switch_to_blog( $blog_id );
		$switched_blog = true;
	}

	$custom_logo_id = get_theme_mod( 'custom_logo' );
	$is_image       = ( $custom_logo_id ) ? wp_attachment_is_image( $custom_logo_id ) : false;

	if ( $switched_blog ) {
		restore_current_blog();
	}

	return $is_image;
}

custom_logo

Other Theme Functions