MT | TEC | Swap the canonical URL for the /all/ page on recurring events

tribe_recurring_canonical_adjuster.php

<?php

/*
 * Swaps the canonical URL for the /all/ page on recurring events
 */
function tribe_recurring_canonical_adjuster() {
	if ( ! tribe_is_recurring_event() ) return;

	remove_action( 'wp_head', 'rel_canonical' );
	add_action( 'wp_head', 'tribe_rel_canonical' );
}
add_action( 'wp', 'tribe_recurring_canonical_adjuster' );

/*
 * Echoes the <meta> canonical= /all/ tag
 */
function tribe_rel_canonical() {
	$postId = get_queried_object_id();

	// set the EventStartDate so Tribe__Events__Main can filter the permalink appropriately
	$post = get_post( $postId );
	$post->EventStartDate = get_query_var( 'eventDate' );

	$link = tribe_all_occurences_link( $postId, false );

	echo "<link rel='canonical' href='" . esc_url( $link ) . "' />\n";
}