Get Posts in Terms Array

get-posts-in-terms-array.php

<?php
function wpmark_get_posts_in_terms_array( $args = array() ) {
	
	/* set some defaults */
	$defaults = array(
		'orderby'	=> 'id',
		'taxonomy'	=> '',
		'posts'		=> '',
	);
	
	/* merge defaults with passed args */
	$args = wp_parse_args( $args, $defaults );
	
	/* setup our default output array */
	$output = array();
		
	/* get the terms for person type */
	$types = get_terms(
		$args[ 'taxonomy' ],
		array(
			'orderby'	=> $args[ 'orderby' ],
			'fields'	=> 'names'
		)
	);
	
	/* loop through each term */
	foreach( $types as $type ) {
		
		/* add this term id as an array key */
		$output[ $type ] = array();
		
	}
		
	/* loop through each post from our array of post ids */
	foreach( $args[ 'posts' ] as $person ) {
		
		/* get the taxonomy terms for this taxonomy */
		$terms = get_the_terms(
			$person,
			$args[ 'taxonomy' ]
		);
		
		/* check we have terms and no errors */
		if( $terms && ! is_wp_error( $terms ) ) {
			
			/* loop through each term */
			foreach( $terms as $term ) {
				
				/* add this posts id to the relevant term in our output array */
				$output[ $term->name ][] = $person;
				
			}
			
		}
		
	} // end term loop
	
	return $output;
	
}
?>