Automatically add ID to displayed post title

I need to add an ID to a displayed post title which currently doesn’t have one within a wordpress site using a child theme.

I have been using the code below in the child theme’s functions file, which works well in adding an ID to any h1 to h6 which doesn’t have one (& leaves any that do alone) but this works only WITHIN the post content (the_content) and it wont add an ID to the displayed post title (see h1 class=”entry-title… on the page [ redundant link removed ]).

Can anyone tell me how I can add an ID to the displayed post title, using a filter like the one below?

Many thanks

/**
 * Automatically add IDs to headings such as <h2></h2>
 */
function auto_id_headings( $content ) {

	$content = preg_replace_callback( '/(\<h[1-6](.*?))\>(.*)(<\/h[1-6]>)/i', function( $matches ) {
		if ( ! stripos( $matches[0], 'id=' ) ) :
			$matches[0] = $matches[1] . $matches[2] . ' id="' . sanitize_title( $matches[3] ) . '">' . $matches[3] . $matches[4];
		endif;
		return $matches[0];
	}, $content );

    return $content;

}
add_filter( 'the_content', 'auto_id_headings' );

• This topic was modified 4 years, 6 months ago by Jan Dembowski.

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