When i Try to reverse the Axis with the following code i do not obtain the reverse orientation

When I try to reverse the axis with the following code I do not obtain the reverse orientation

$chart1->getChartAxisX()->setAxisOrientation(Axis::ORIENTATION_REVERSED);

How to change the coordinate axis from small to large?

My guess is that you want the data sources to appear in the table in the same order as the bar chart, and your graph is a horizontal bar, so your code is fine, and it does invert the X-axis. But why doesn't it work, and so I looked at the source code. The code for getChartAxisX() in your method looks like this

    public function getChartAxisX()
    {
        if ($this->xAxis !== null) {
            return $this->xAxis;
        }

        return new Axis();
    }

As you can see, when the member variable xAxis does not exist, this method creates a new object and returns it. But this new object is not set into the $chart object, so your set method does not work on the $chart object.

However, I have found that Chart does not have a setXAxis() method in PhpSpreadsheet, so if you want it to work, you should set the Axis object in when you create the $chart object.

$axisX = new Axis();
$axisX->setAxisOrientation(Axis::ORIENTATION_REVERSED);
$chart = new Chart(
    "chart", // name
    $title, // title
    $legend, // legend
    $plotArea, // plotArea
    true, // plotVisibleOnly
    DataSeries::EMPTY_AS_GAP, // displayBlanksAs null,
    $xAxisLabel, // xAxisLabel - Owen added null xAxisLabel
    $yAxisLabel, // yAxisLabel
    $axisX //xAxis
);

Now it should do what you want.