PHP SVG Charts - Documentation

Simple. MIT Open-Source licensed. Generate SVG image charts in your backend, no javascript or browser needed.
The main reason this library was built is to generate PDFs with charts in PHP only.

The most basic line chart example

<?php
use BrainFooLong\SvgCharts\LabelFormats;
use BrainFooLong\SvgCharts\Renderer\TextRect;
use BrainFooLong\SvgCharts\Renderer\YAxis;
use BrainFooLong\SvgCharts\SvgChart;

$charts = new SvgChart("line-chart-basic", 900, 400);
$yAxis = new YAxis('data', 'Awesome lines', LabelFormats::numberFormat(2));
$chart = $charts->createLineAndColumnChart();
$chart->xAxis->title = "Time";
$chart->xAxis->titleDrawSettings = new TextRect();
$chart->xAxis->valueLabelDrawSettings = new TextRect();
$chart->addLineDataSeries(
    $yAxis,
    [
        ['x' => 0, 'y' => 5],
        ['x' => 1, 'y' => 10],
        ['x' => 2, 'y' => 80],
        ['x' => 4, 'y' => 1],
        ['x' => 5, 'y' => -90],
    ],
);

Basic line charts with custom labels and step lines

<?php
use BrainFooLong\SvgCharts\LabelFormats;
use BrainFooLong\SvgCharts\Renderer\TextRect;
use BrainFooLong\SvgCharts\Renderer\YAxis;
use BrainFooLong\SvgCharts\SvgChart;

$charts = new SvgChart("line-chart-custom-labels", 900, 400);
$charts->createGrid();
$yAxis = new YAxis('data', 'Awesome lines', LabelFormats::numberFormat(2));
$chart = $charts->createLineAndColumnChart();
$chart->xAxis->title = "Time";
$chart->xAxis->titleDrawSettings = new TextRect();
$chart->xAxis->valueLabelDrawSettings = new TextRect();
$chart->xAxis->labelFormatter = LabelFormats::keyValueList(
    [0 => 'Foo', 1 => 'Bar', 2 => 'Cool', 4 => 'Isn\'t', 5 => 'It'],
);
$yAxis->labelFormatter = LabelFormats::keyValueList(
    [5 => 'Five', 10 => 'Ten', 80 => 'Eighty', 1 => 'One', -90 => 'Minus Ninety'],
);
$chart->addLineDataSeries(
    $yAxis,
    [
        ['x' => 0, 'y' => 5],
        ['x' => 1, 'y' => 10],
        ['x' => 2, 'y' => 80],
        ['x' => 4, 'y' => 1],
        ['x' => 5, 'y' => -90],
    ],
    0,
    lineMode: 'step'
);

Line charts with multiple lines sharing same yaxis

Also including a grid and smooth curved lines
Each series has different x values so it starts and stops independently
Also each series have different styles so each series can be styled for your needs
Extra annotations on each of the axis are also added
And on top, we a have a few special stylings attached, like gradients

<?php
use BrainFooLong\SvgCharts\DrawSettings;
use BrainFooLong\SvgCharts\LabelFormats;
use BrainFooLong\SvgCharts\Renderer\Circle;
use BrainFooLong\SvgCharts\Renderer\Line;
use BrainFooLong\SvgCharts\Renderer\TextRect;
use BrainFooLong\SvgCharts\Renderer\YAxis;
use BrainFooLong\SvgCharts\SvgChart;

$now = 1029281711;

// setup chart
$charts = new SvgChart("line-chart-multi", 900, 400, 20, 30, 30, 30);
$charts->defaultFontDrawSettings->fontFamily = 'trebuchet ms';

// define a gradient to use as color
$gradientColor = $charts->defineLinearGradient(
    90,
    [0 => '#b70c00', 14 => '#c10020', 28 => '#c6003a', 42 => '#c50055', 57 => '#bd0073', 71 => '#aa0093', 85 => '#8c00b2', 100 => '#5900cd']
);

// setup grid
$grid = $charts->createGrid();
$grid->lines = 10;

// create chart
$chart = $charts->createLineAndColumnChart();

// some x annotations
$annotationX = new TextRect('Annotation X', drawSettings: new DrawSettings(fill: 'white', fontSize: 11));
$annotationX->setBackground(5, 'blue');
$annotationX->anchorVertical = $annotationX::ANCHOR_VERTICAL_BOTTOM;
$chart->xAxis->addLineAnnotation(
    $now - 1220,
    new Line(drawSettings: new DrawSettings(stroke: 'blue', strokeDasharray: '4 2')),
    $annotationX
);

// xaxis settings
$chart->xAxis->title = "Time";
$chart->xAxis->titleDrawSettings = new TextRect();
$chart->xAxis->valueLabelDrawSettings = new TextRect(rotate: -40);
$chart->xAxis->minValue = "-=200";
$chart->xAxis->maxValue = "+=200";
$chart->xAxis->labelFormatter = LabelFormats::date("d.m.Y H:i");

// first yaxis
$yAxis = new YAxis(
    'data',
    'BEST',
    LabelFormats::numberFormat(2),
    drawSettingsTitle: new DrawSettings(fontWeight: 'bold'),
);
$yAxis->minValue = "-=10";
$yAxis->maxValue = "+=20";
$yAxis->titleDefaults = new TextRect();

// some y axis annotations
$annotationY = new TextRect('Annotation Y', drawSettings: new DrawSettings(fill: 'white', fontSize: 11));
$annotationY->setBackground(5, 'green');
$annotationY->anchorVertical = $annotationX::ANCHOR_VERTICAL_BOTTOM;
$annotationY->anchorHorizontal = $annotationX::ANCHOR_HORIZONTAL_RIGHT;
$yAxis->addLineAnnotation(
    50,
    new Line(drawSettings: new DrawSettings(stroke: 'green', strokeDasharray: '4 2')),
    $annotationY
);
$annotationPointY = new TextRect('Annotation Point', drawSettings: new DrawSettings(fill: 'white', fontSize: 11));
$annotationPointY->setBackground(5, 'brown');
$annotationPointY->anchorVertical = $annotationX::ANCHOR_VERTICAL_TOP;
$annotationPointY->anchorHorizontal = $annotationX::ANCHOR_HORIZONTAL_LEFT;
$yAxis->addPointAnnotation(
    $now - 2220,
    70,
    new Circle(r: 5, drawSettings: new DrawSettings(fill: 'brown')),
    $annotationPointY
);

$background = $yAxis->titleDefaults->setBackground(5, 'green', 5);
$background->drawSettings->fillOpacity = 0.4;
$chart->addLineDataSeries(
    $yAxis,
    [
        ['x' => $now - 3600, 'y' => 10],
        ['x' => $now - 2600, 'y' => 20, 'pointAttributes' => ['title' => 'foobar']],
        ['x' => $now - 1600, 'y' => 30],
        ['x' => $now - 1300, 'y' => 10],
        ['x' => $now - 1200, 'y' => -10],
        ['x' => $now - 350, 'y' => -20],
    ],
    5,
    'curve',
    1,
    new DrawSettings(stroke: 'green', strokeWidth: 5),
    new DrawSettings(fill: 'green'),
    new DrawSettings($gradientColor, 0.5),
);
$yAxisBase = $yAxis;

// second yaxis
$yAxis = new YAxis('data2', 'BEST', LabelFormats::numberFormat(2));
$yAxis->titleDefaults = new TextRect();
$yAxis->position = $yAxis::LABEL_POSITION_RIGHT;
$background = $yAxis->titleDefaults->setBackground();
$background->borderRadius = 5;
$background->drawSettings = new DrawSettings('blue', fillOpacity: 0.4);
$valueLabelDrawSettings = new TextRect(drawSettings: new DrawSettings(fill: 'white', fontSize: 11));
$valueLabelDrawSettings->setBackground(5, 'red');
$valueLabelDrawSettings->anchorHorizontal = $valueLabelDrawSettings::ANCHOR_HORIZONTAL_CENTER;
$valueLabelDrawSettings->anchorVertical = $valueLabelDrawSettings::ANCHOR_VERTICAL_BOTTOM;
$valueLabelDrawSettings->anchorVerticalOffset = -7;
$chart->addLineDataSeries(
    $yAxis,
    [
        ['x' => $now - 4600, 'y' => 30],
        ['x' => $now - 2600, 'y' => 70, 'pointAttributes' => ['title' => 'foobar']],
        ['x' => $now - 1600, 'y' => 80],
        ['x' => $now - 1300, 'y' => 100],
        ['x' => $now - 1200, 'y' => -10],
        ['x' => $now - 100, 'y' => -20],
    ],
    lineDrawSettings: new DrawSettings(stroke: 'blue'),
    valueLabelDrawSettings: $valueLabelDrawSettings
);

// combine yaxis into one
$chart->combineYAxis = [$yAxisBase, $yAxis];

Line charts with multiple lines each having it's own y-axis

Multi line charts, each line with it's own y-axis

<?php
use BrainFooLong\SvgCharts\DrawSettings;
use BrainFooLong\SvgCharts\LabelFormats;
use BrainFooLong\SvgCharts\Renderer\TextRect;
use BrainFooLong\SvgCharts\Renderer\YAxis;
use BrainFooLong\SvgCharts\SvgChart;

$charts = new SvgChart("line-chart-multi-separate", 900, 400, 20, 30, 30, 30);
$charts->defaultFontDrawSettings->fontFamily = 'trebuchet ms';

$gradientColor = "green";

$grid = $charts->createGrid();
$grid->lines = 10;
$chart = $charts->createLineAndColumnChart();
$chart->xAxis->title = "Time";
$chart->xAxis->titleDrawSettings = new TextRect();
$chart->xAxis->valueLabelDrawSettings = new TextRect(rotate: -40);
$chart->xAxis->minValue = "-=200";
$chart->xAxis->maxValue = "+=200";
$chart->xAxis->labelFormatter = LabelFormats::date("d.m.Y H:i");
$yAxis = new YAxis(
    'data',
    '',
    LabelFormats::numberFormat(2),
    drawSettingsTitle: new DrawSettings(fontWeight: 'bold'),
);
$yAxis->minValue = "-=10";
$yAxis->maxValue = "+=20";
$yAxis->titleDefaults = new TextRect();
$background = $yAxis->titleDefaults->setBackground(5, 'green', 5);
$background->drawSettings->fillOpacity = 0.4;
$now = 1029281711;
$chart->addLineDataSeries(
    $yAxis,
    [
        ['x' => $now - 3600, 'y' => 10],
        ['x' => $now - 2600, 'y' => 20, 'pointAttributes' => ['title' => 'foobar']],
        ['x' => $now - 1600, 'y' => 30],
        ['x' => $now - 1300, 'y' => 10],
        ['x' => $now - 1200, 'y' => -10],
        ['x' => $now - 350, 'y' => -20],
    ],
    5,
    'curve',
    1,
    new DrawSettings(stroke: 'green', strokeWidth: 5),
    new DrawSettings(fill: 'green'),
    new DrawSettings($gradientColor, 0.5),
);

$yAxis = new YAxis('data2', 'BEST', LabelFormats::numberFormat(2));
$yAxis->titleDefaults = new TextRect();
$yAxis->position = $yAxis::LABEL_POSITION_RIGHT;
$background = $yAxis->titleDefaults->setBackground(5, 'blue', 5);
$background->drawSettings->fillOpacity = 0.4;
$valueLabelDrawSettings = new TextRect(
    drawSettings: new DrawSettings(
        fill: 'white',
        fontSize: 11,
    )
);
$valueLabelDrawSettings->setBackground(5, 'red');
$valueLabelDrawSettings->anchorHorizontal = $valueLabelDrawSettings::ANCHOR_HORIZONTAL_CENTER;
$valueLabelDrawSettings->anchorVertical = $valueLabelDrawSettings::ANCHOR_VERTICAL_BOTTOM;
$valueLabelDrawSettings->anchorVerticalOffset = -7;
$chart->addLineDataSeries(
    $yAxis,
    [
        ['x' => $now - 4600, 'y' => 30],
        ['x' => $now - 2600, 'y' => 70, 'pointAttributes' => ['title' => 'foobar']],
        ['x' => $now - 1600, 'y' => 80],
        ['x' => $now - 1300, 'y' => 100],
        ['x' => $now - 1200, 'y' => -10],
        ['x' => $now - 100, 'y' => -20],
    ],
    lineDrawSettings: new DrawSettings(stroke: 'blue'),
    valueLabelDrawSettings: $valueLabelDrawSettings
);

Line charts with many data points and auto rotation/skip

This chart show how the x-axis auto fit itself so nothing overlaps

<?php
use BrainFooLong\SvgCharts\DrawSettings;
use BrainFooLong\SvgCharts\LabelFormats;
use BrainFooLong\SvgCharts\Renderer\TextRect;
use BrainFooLong\SvgCharts\Renderer\YAxis;
use BrainFooLong\SvgCharts\SvgChart;

$charts = new SvgChart("line-chart-many", 900, 400, 20, 30, 30, 30);

$grid = $charts->createGrid();
$grid->lines = 10;

$chart = $charts->createLineAndColumnChart();
$chart->xAxis->title = "Time";
$chart->xAxis->titleDrawSettings = new TextRect();
$chart->xAxis->valueLabelDrawSettings = new TextRect(rotate: -40);
$chart->xAxis->minValue = "-=200";
$chart->xAxis->maxValue = "+=200";
$chart->xAxis->labelFormatter = LabelFormats::date("d.m.Y H:i");
//    $chart->xAxis->autoRotate = false;
$yAxis = new YAxis(
    'data',
    'BEST',
    LabelFormats::numberFormat(2),
    drawSettingsTitle: new DrawSettings(fontWeight: 'bold'),
);
$yAxis->minValue = "-=10";
$yAxis->maxValue = "+=20";
$yAxis->titleDefaults = new TextRect();
$background = $yAxis->titleDefaults->setBackground(5, 'green', 5);
$background->drawSettings->fillOpacity = 0.4;
$now = 1029281711;
$data = [];
for ($i = 0; $i < 255; $i++) {
    $data[] = ['x' => $now + ($i * 1000), 'y' => sin($i) * 100];
}
$chart->addLineDataSeries(
    $yAxis,
    $data,
    5,
    'straight',
    1,
    new DrawSettings(stroke: 'green', strokeWidth: 5),
    new DrawSettings(fill: 'green')
);

Annotations and Fonts

You can add several annotation types to x and y axis
Also there are most websafe fonts built in
You can use any font you want, but only the websafe ones correctly calculates text dimensions (required to properly place labels)

<?php
use BrainFooLong\SvgCharts\DrawSettings;
use BrainFooLong\SvgCharts\LabelFormats;
use BrainFooLong\SvgCharts\Renderer\Circle;
use BrainFooLong\SvgCharts\Renderer\Line;
use BrainFooLong\SvgCharts\Renderer\TextRect;
use BrainFooLong\SvgCharts\Renderer\YAxis;
use BrainFooLong\SvgCharts\SvgChart;

// setup chart
$charts = new SvgChart("chart-annotations", 900, 400);
$charts->createGrid();
$yAxis = new YAxis('data', 'Awesome lines', LabelFormats::numberFormat(2));
$chart = $charts->createLineAndColumnChart();
$chart->xAxis->titleDrawSettings = new TextRect();
$chart->xAxis->valueLabelDrawSettings = new TextRect();
$chart->addLineDataSeries(
    $yAxis,
    [
        ['x' => 0, 'y' => 5],
        ['x' => 1, 'y' => 10],
        ['x' => 2, 'y' => 80],
        ['x' => 4, 'y' => 1],
        ['x' => 5, 'y' => -90],
    ],
);
$annotationY = new TextRect('Y Line Annotation', drawSettings: new DrawSettings(fill: 'white', fontSize: 11));
$annotationY->setBackground(5, 'blue');
$annotationY->anchorVertical = $annotationY::ANCHOR_VERTICAL_BOTTOM;
$yAxis->addLineAnnotation(
    50,
    new Line(drawSettings: new DrawSettings(stroke: 'blue', strokeDasharray: '4 2')),
    $annotationY
);

// some x annotations
$annotationX = new TextRect('X Line Annotation', drawSettings: new DrawSettings(fill: 'white', fontSize: 11));
$annotationX->setBackground(5, 'blue');
$annotationX->anchorVertical = $annotationX::ANCHOR_VERTICAL_BOTTOM;
$chart->xAxis->addLineAnnotation(
    3,
    new Line(drawSettings: new DrawSettings(stroke: 'blue', strokeDasharray: '4 2')),
    $annotationX
);

$fonts = ['arial', 'verdana', 'tahoma', 'trebuchet ms', 'times new roman', 'georgia', 'garamond', 'courier new'];
$y = 80;
$x = 0;
foreach ($fonts as $font) {
    $annotationPointY = new TextRect("Annotation Point\n" . $font, drawSettings: new DrawSettings(fill: 'white', fontFamily: $font, fontSize: 11));
    $annotationPointY->setBackground(5, 'brown');
    $annotationPointY->anchorVertical = $annotationX::ANCHOR_VERTICAL_TOP;
    $annotationPointY->anchorHorizontal = $annotationX::ANCHOR_HORIZONTAL_LEFT;
    $yAxis->addPointAnnotation(
        $x,
        $y,
        new Circle(r: 5, drawSettings: new DrawSettings(fill: 'brown')),
        $annotationPointY
    );
    $y -= 20;
    $x += 0.5;

Basic column chart example

Very basic column charts. y-Baseline is set to -110, bellow all given values. So all columns grow upwards.

<?php
use BrainFooLong\SvgCharts\DrawSettings;
use BrainFooLong\SvgCharts\LabelFormats;
use BrainFooLong\SvgCharts\Renderer\TextRect;
use BrainFooLong\SvgCharts\Renderer\YAxis;
use BrainFooLong\SvgCharts\SvgChart;

$charts = new SvgChart("column-chart-basic", 900, 400);
$charts->createGrid();
$yAxis = new YAxis('data', 'Awesome lines', LabelFormats::numberFormat(2));
$chart = $charts->createLineAndColumnChart();
$chart->xAxis->titleDrawSettings = new TextRect();
$chart->xAxis->valueLabelDrawSettings = new TextRect();
$valueLabelDrawSettings = new TextRect(
    drawSettings: new DrawSettings(
        fill: 'white',
        fontSize: 11,
    )
);
$valueLabelDrawSettings->setBackground([1, 5, 1, 5], '#333', 5);
$valueLabelDrawSettings->anchorVertical = $valueLabelDrawSettings::ANCHOR_VERTICAL_TOP;
$chart->addColumnDataSeries(
    $yAxis,
    [
        ['x' => 0, 'values' => 5],
        ['x' => 1, 'values' => 10],
        ['x' => 2, 'values' => 80],
        ['x' => 4, 'values' => 1],
        ['x' => 5, 'values' => -90],
    ],
    0.5,
    10,
    -110,
    valueLabelDrawSettings: $valueLabelDrawSettings
);

Stacked columns

Multiple values stacked in one column
y-Baseline is set to zero (default), so values bellow zero go down
Value labels are added as well as a summary label for each column

<?php
use BrainFooLong\SvgCharts\DrawSettings;
use BrainFooLong\SvgCharts\LabelFormats;
use BrainFooLong\SvgCharts\Renderer\TextRect;
use BrainFooLong\SvgCharts\Renderer\YAxis;
use BrainFooLong\SvgCharts\SvgChart;

$charts = new SvgChart("column-chart-stacked", 900, 400);
$charts->createGrid();
$yAxis = new YAxis('data', 'Awesome lines', LabelFormats::numberFormat(2));
$yAxis->minValue = "-=20";
$yAxis->maxValue = "+=20";
$yAxis->labelFormatter = LabelFormats::numberFormat(1, suffix: "%");
$chart = $charts->createLineAndColumnChart();
$chart->xAxis->titleDrawSettings = new TextRect();
$chart->xAxis->valueLabelDrawSettings = new TextRect();
$valueLabelDrawSettings = new TextRect(
    drawSettings: new DrawSettings(
        fill: 'white',
        fontSize: 11,
    )
);
$valueLabelDrawSettings->setBackground([1, 5, 1, 5], '#333', 5);
$valueLabelDrawSettings->anchorVertical = $valueLabelDrawSettings::ANCHOR_VERTICAL_TOP;

$summaryLabelDrawSettings = new TextRect(
    drawSettings: new DrawSettings(
        fill: 'white',
        fontSize: 15,
    )
);
$summaryLabelDrawSettings->setBackground([1, 5, 1, 5], '#666', 5);
$summaryLabelDrawSettings->anchorVerticalOffset = 5;

$chart->addColumnDataSeries(
    $yAxis,
    [
        ['x' => 0, 'values' => [5, 30, 20]],
        ['x' => 1, 'values' => [1, 20, 66]],
        ['x' => 2, 'values' => [80, 20, 33]],
        ['x' => 4, 'values' => [90, 120, 15]],
        ['x' => 5, 'values' => [20, 22, 10]],
        ['x' => 6, 'values' => [-15, -30, -20]],
    ],
    valueLabelDrawSettings: $valueLabelDrawSettings,
    summaryLabelDrawSettings: $summaryLabelDrawSettings
);

Mixed column and line charts

You can freely mix any line and column chart together

<?php
use BrainFooLong\SvgCharts\LabelFormats;
use BrainFooLong\SvgCharts\Renderer\TextRect;
use BrainFooLong\SvgCharts\Renderer\YAxis;
use BrainFooLong\SvgCharts\SvgChart;

$charts = new SvgChart("column-line-mixed-chart", 900, 400);
$charts->createGrid();
$chart = $charts->createLineAndColumnChart();
$chart->xAxis->titleDrawSettings = new TextRect();
$chart->xAxis->valueLabelDrawSettings = new TextRect();
$chart->xAxis->labelFormatter = LabelFormats::keyValueList([1 => 'January', 2 => 'February', 3 => 'March', 4 => 'April', 5 => 'May', 6 => 'June']);

$yAxis2 = new YAxis('data2', 'Awesome lines', LabelFormats::numberFormat(2));
$chart->addColumnDataSeries(
    $yAxis2,
    [
        ['x' => 1, 'values' => [5, 30, 20]],
        ['x' => 2, 'values' => [1, 20, 66]],
        ['x' => 3, 'values' => [80, 10, 33]],
        ['x' => 4, 'values' => [90, 120, 5]],
        ['x' => 5, 'values' => [20, 6, 10]],
        ['x' => 6, 'values' => [-5, -30, -20]],
    ],
);

$yAxis = new YAxis('data', 'Awesome lines', LabelFormats::numberFormat(2));
$chart->xAxis->title = "Time";
$chart->addLineDataSeries(
    $yAxis,
    [
        ['x' => 1, 'y' => 5],
        ['x' => 2, 'y' => 10],
        ['x' => 3, 'y' => 80],
        ['x' => 4, 'y' => 1],
        ['x' => 5, 'y' => 10],
        ['x' => 6, 'y' => -20],
    ],
);
$chart->combineYAxis = [$yAxis, $yAxis2];

Column and line charts with grouped and stacked data combined

You can group and stack at the same time, as well as adding line charts on top

<?php
use BrainFooLong\SvgCharts\ColumnDataPointGrouped;
use BrainFooLong\SvgCharts\DrawSettings;
use BrainFooLong\SvgCharts\LabelFormats;
use BrainFooLong\SvgCharts\Renderer\TextRect;
use BrainFooLong\SvgCharts\Renderer\YAxis;
use BrainFooLong\SvgCharts\SvgChart;

$charts = new SvgChart("column-line-mixed-chart-grouped-stacked", 900, 400);
$charts->createGrid();
$yAxis = new YAxis('data', 'Awesome lines', LabelFormats::numberFormat(2));
$chart = $charts->createLineAndColumnChart();
$chart->xAxis->titleDrawSettings = new TextRect();
$chart->xAxis->valueLabelDrawSettings = new TextRect();
$chart->addColumnDataSeries(
    $yAxis,
    [
        new ColumnDataPointGrouped(
            0, [['values' => [5, 30, 20]], ['values' => [5, 30, 20]], ['values' => [5, 30, 20]]]
        ),
        new ColumnDataPointGrouped(
            1, [['values' => [1, 20, 66]], ['values' => [1, 20, 66]], ['values' => [1, 20, 66]]]
        ),
        new ColumnDataPointGrouped(
            2, [['values' => [80, 10, 33]], ['values' => [80, 10, 33]], ['values' => [80, 10, 33]]]
        ),
        new ColumnDataPointGrouped(
            3, [['values' => [90, 120, 5]], ['values' => [90, 120, 5]], ['values' => [90, 120, 5]]]
        ),
        new ColumnDataPointGrouped(
            4, [['values' => [20, 6, 10]], ['values' => [20, 6, 10]], ['values' => [20, 6, 10]]]
        ),
    ],
);
$yAxis2 = new YAxis('data2', 'Awesome lines', LabelFormats::numberFormat(2));
$chart->xAxis->title = "Time";
$chart->addLineDataSeries(
    $yAxis2,
    [
        ['x' => 0, 'y' => 5],
        ['x' => 1, 'y' => 10],
        ['x' => 2, 'y' => 80],
        ['x' => 3, 'y' => 1],
        ['x' => 4, 'y' => 10],
    ],
    lineDrawSettings: new DrawSettings(stroke: '#333', strokeWidth: 3)
);
$chart->combineYAxis = [$yAxis, $yAxis2];