4 Trees - ftf_locate_template()

/**
 * check if a file exists with logical fallback #
 * first check the child, then the parent, then the framework ##
 *
 * @param - string - $include - file with path ( from library/ )
 * @param - boolean - $echo - echo or return the results
 * @param - boolean - $require - include with require_once
 * @since 0.1
 * @uses ftf_get_option()
 * @return - echo|string|require_once
 */
if ( !function_exists( 'ftf_locate_template' ) ) {
function ftf_locate_template( $include, $echo = true, $require = false ){

    ...

    // apply filters ##
    $ftf_locate_template = apply_filters( 'ftf_locate_template', $ftf_locate_template );

}}