phplot doesn`t show x labels with multiple plots

[Artem]

Hello all.

I found a strange thing, maybe it`s bug. I created two plots on the one image. First has type lines, second - bars. The issue is that x labels not appears to the bars plot. But if I delete first plot or change it type to bars - x labels for the second plot becomes visible.

Code:

<?php

    require_once('phplot-6.2.0/phplot.php');

    // First plot data
    $data1 = array(
        array('', 1468137200, 50),
        array('', 1468248200, 111),
        array('', 1468359200, 75),
        array('', 1468460200, 95),
        array('', 1468571200, 98),
    );

    // Second plot data
    $data2 = array(
        array('mar', 2),
        array('apr', 4),
        array('may', 6),
        array('jun', 10),
        array('jul', 12),
        array('aug', 14),
        array('sep', 20),
    );

    $plot_width = 500;
    $plot_height = 500;
    $plot_margin_top = 30;
    $plot_margin_bottom = 30;

    $plot = new PHPlot($plot_width, $plot_height);
    $plot->SetPrintImage(0);

    # Draw first plot
    $plot->SetPlotType('lines');
    $plot->SetDataType('data-data');
    $plot->SetXLabelType('time', '%d %b');
    $plot->SetNewPlotAreaPixels(null , 0 + $plot_margin_top,  null, $plot_height / 2 - $plot_margin_bottom);
    $plot->SetPlotAreaWorld(NULL, 0, NULL, NULL);
    $plot->SetDataValues($data1);
    $plot->DrawGraph();

    # Draw second plot
    $plot->SetPlotType('bars');
    $plot->SetDataType('text-data');
    $plot->SetXTickLabelPos('none');
    $plot->SetXTickPos('none');
    $plot->SetNewPlotAreaPixels(null, $plot_height / 2 + $plot_margin_top, null, $plot_height - $plot_margin_bottom);
    $plot->SetPlotAreaWorld(NULL, 0, NULL, NULL);
    $plot->SetDataValues($data2);
    $plot->DrawGraph();

    $plot->PrintImage();

Two plots:

Only second:

[Artem]

I found solution. For the second plot I set x label type to default:

$plot->SetXLabelType('');