trace file on error_log

function jnews_trace_log() {
    $backtrance = debug_backtrace();

    $logs = array();
    if ( is_array( $backtrance ) ) {
        foreach ( $backtrance as $log ) {
            if ( isset( $log['file'] ) && isset( $log['line'] ) ) {
                $logs[] = $log['file'] . ':' . $log['line'];
            }
        }
    }
    error_log( print_r( $logs, true ) );
}