apply_filters( ‘language_attributes’, string $output, string $doctype )

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   Guillaume TURPIN 2 years ago

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   Here is a function to force the locale of the HTML lang attribute without breaking the other attributes like dir

   /**
    * Forces the site locale for the HTML lang attribute.
    * 
    * @param string $locale the locale to set with the following format : "en-US"
    * @return void
    */
   function wpdocs_force_site_locale( $locale = 'en-US' ) {
   	add_filter( 'language_attributes', function( $output ) use ( $locale ) {
   		// match the lang attribute and replace it with the new locale
   		$lang_regex = '/lang="([a-zA-Z-_]+)"/';
   		$output     = preg_replace( $lang_regex, 'lang="' . $locale . '"', $output );
   
   		// update the xml:lang attribute as well
   		$xml_lang_regex = '/xml:lang="([a-zA-Z-_]+)"/';
   		$output         = preg_replace( $xml_lang_regex, 'xml:lang="' . $locale . '"', $output );
   		
   		return $output;
   	} );
   }

   • The second preg_replace is not necessary, the first preg_replace will have already changed it.

     scott8035 8 months ago