Using WordPress ‘require_if_theme_supports()’ PHP function

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The require_if_theme_supports() WordPress PHP function checks a theme’s support for a given feature before loading the functions which implement it.

Usage

require_if_theme_supports( $feature, $file );

Example:

require_if_theme_supports( 'post-thumbnails', 'inc/post-thumbnails.php' );

Parameters

  • $feature (string) (Required) – The feature being checked. See add_theme_support() for the list of possible values.
  • $file (string) (Required) – Path to the file.

More information

See WordPress Developer Resources: require_if_theme_supports

Examples

Load custom background functions

Load custom background functions if the theme supports custom backgrounds.

require_if_theme_supports( 'custom-background', 'inc/custom-background.php' );

Load custom logo functions

Load custom logo functions if the theme supports custom logos.

require_if_theme_supports( 'custom-logo', 'inc/custom-logo.php' );

Load custom header functions

Load custom header functions if the theme supports custom headers.

require_if_theme_supports( 'custom-header', 'inc/custom-header.php' );

Load HTML5 support functions

Load HTML5 support functions if the theme supports HTML5.

require_if_theme_supports( 'html5', 'inc/html5.php' );

Load post format functions

Load post format functions if the theme supports post formats.

require_if_theme_supports( 'post-formats', 'inc/post-formats.php' );