WordPress: Advanced Custom Fields, find taxonomy term by custom value

get-term-by-value.php

function get_term_by_value($taxonomy, $field, $value) {

	// probably a better way to do this, but this works for now
	// get_field is part of Advanced Custom Fields
	if (function_exists('get_field')) {
		foreach (get_terms( $taxonomy ) as $term) {
			$field = get_field($field, $term);
			if ($value == $field)
				return $field;
		}
	}

	return false;
}