PHP-Boxplot is a PHP Library which is easy to use for creating boxplots.

Outlier Detection can be turned on/off.

Plotting Mean, Plotting Jitter and Plotting Outliers are available.

Multiple datasets can be displayed side by side at the same time.

Legends can also be displayed.

Transparent background is also supported.

• 1. Features
• 2. Contents
• 3. Requirements
• 4. Installation
• 5. Usage
  • 5.1. Basic Usage
  • 5.2. Adjusting the Display By Methods
  • 5.3. Multiple Data Set
  • 5.4. Adjusting the Display By Neon File
  • 5.5. Adjusting the Display By Array
  • 5.6. Transparent Background
• 6. Examples
• 7. LICENSE

• PHP 8.3 or later

• Imagick PHP Extension

  Check with commands:

  (php -m; php -i) | grep imagick

• Mbstring PHP Extension

  Check with commands:

  (php -m; php -i) | grep mbstring

• Composer

composer require macocci7/php-boxplot

• 5.1. Basic Usage
• 5.2. Adjusting the Display By Methods
• 5.3. Multiple Data Set
• 5.4. Adjusting the Display By Neon File
• 5.5. Adjusting the Display By Array
• 5.6. Transparent Background

• PHP: examples/BasicUsage.php

  <?php
  
  require_once __DIR__ . '/../vendor/autoload.php';
  
  use Macocci7\PhpBoxplot\Boxplot;
  
  $data = [
      '1st' => [ 75, 82, 96, 43, 78, 91, 84, 87, 93, ],
      '2nd' => [ 66, 74, 62, 100, 72, 68, 59, 76, 65, ],
      '3rd' => [ 56, 0, 45, 76, 58, 52, 13, 48, 54, 68, ],
      '4th' => [ 68, 32, 56, 92, 67, 72, 45, 76, 48, 73, ],
      '5th' => [ 70, 58, 62, 88, 62, 68, 56, 63, 64, 78, ],
  ];
  
  $bp = new Boxplot();
  
  $bp->setData($data)
     ->create(__DIR__ . '/img/BasicUsage.png');

• Result:

  
  • Outlier Detection is enabled by default.
  • Outliers are plotted as red dods.
  • The Scale Range is 10% larger than the Data Range.
  • Horizontal grid lines are drawn at intervals of 10% of the Scale Range.
  • The hash keys of the data are used as the labels for the X axis.

• Details:

  • Import Autoloader: require_once __DIR__ . '/../vendor/autoload.php'
  • Declare: use Macocci7\PhpBoxplot\Boxplot
  • Instantiate: new Boxplot()
  • Set Data: setData($data)
    • Acceptable Data Type: array<int|string, array<int|float>>
  • Create Image: create($path)

Adjusting Scale Size, Grid Pitch, Showing Vertical Grids,

Setting Labels for Each Boxplot, Labels for X Axis, Labels For Y Axis

And Setting Caption can be done as follows:

• PHP:

  <?php
  
  require_once __DIR__ . '/../vendor/autoload.php';
  
  use Macocci7\PhpBoxplot\Boxplot;
  
  $data = [
      '1st' => [ 75, 82, 96, 43, 78, 91, 84, 87, 93, ],
      '2nd' => [ 66, 74, 62, 100, 72, 68, 59, 76, 65, ],
      '3rd' => [ 56, 0, 45, 76, 58, 52, 13, 48, 54, 68, ],
      '4th' => [ 68, 32, 56, 92, 67, 72, 45, 76, 48, 73, ],
      '5th' => [ 70, 58, 62, 88, 62, 68, 56, 63, 64, 78, ],
  ];
  
  $bp = new Boxplot();
  
  $bp->setData($data)
     ->limit(0, 100)
     ->gridHeightPitch(20)
     ->gridVerticalOn()
     ->meanOn()
     ->jitterOn()
     ->legendOn()
     ->labels([ '#1', '#2', '#3', '#4', '#5', ])
     ->labelX('Achievement Test')
     ->labelY('Score')
     ->caption('Achievement Test Results in 2023')
     ->legends(['Donald Biden'])
     ->create(__DIR__ . '/img/AdjustDisplayByMethods.png');

• Result:

  

• Details:

  • Set Limits: limit(int|float $lower, int|float $upper)

  • Set Grid Pitch: gridHeightPitch(int|float $pitch)

  • Set Vertical Grid Visibility:

    • gridVerticalOn()
    • gridVerticalOff()

  • Set Labels: labels(string[] $labels)

  • Set Label for X Axis: labelX(string $labelX)

  • Set Label for Y Axis: labelY(string $labelY)

  • Set Caption: caption(string $caption)

  • Available Methods:

    Note: $colorCode must be in #RGB or #RRGGBB format.

    Method	Detail
    resize(int $width, int $height)	Resizes Canvas Size
    bgcolor(string $colorCode)	Sets Canvas Background Color
    fontColor(string $colorCode)	Sets Font Color
    axisColor(string $colorCode)	Sets Axis Color
    gridColor(string $colorCode)	Sets Grid Color
    boxBorder(int $width, string $colorCode)	Sets Box Border Color
    whisker(int $width, string $colorCode)	Sets Whisker Width and Color
    gridHeightPitch(int|float $pitch)	Sets Grid Pitch
    boxWidth(int $width)	Sets Box Width
    boxBackground(array $colorCodes)	Sets Box Background Color Set
    labels(array $labels)	Sets Labels for Each Box
    labelX(string $label)	Sets Label for X Axis
    labelY(string $label)	Sets Label for Y Axis
    caption(string $caption)	Sets Caption
    legends(array $legends)	Sets Legend Labels
    legendBgcolor(string $colorCode)	Sets Legends Area Background Color
    gridVerticalOn()	Sets Visibility of Vertical Grid On
    gridVerticalOff()	Sets Visibility of Vertical Grid Off
    outlierOn()	Sets Outlier Detection On
    outlierOff()	Sets Outlier Detection Off
    jitterOn()	Sets Jitter Plot On
    jitterOff()	Sets Jitter Plot Off
    meanOn()	Sets Plotting Mean On
    meanOff()	Sets Plotting Mean Off
    legendOn()	Sets Displaying Legends On
    legendOff()	Sets Displaying Legends Off

Multiple datasets can be displayed side by side at the same time.

• PHP: examples/MultipleDataSet.php

  <?php
  
  require_once __DIR__ . '/../vendor/autoload.php';
  
  use Macocci7\PhpBoxplot\Boxplot;
  
  $dataSet = [
      'John' => [
          '1st' => [75, 82, 96, 43, 78, 91, 84, 87, 93, ],
          '2nd' => [66, 74, 62, 100, 72, 68, 59, 76, 65, ],
          '3rd' => [56, 0, 45, 76, 58, 52, 13, 48, 54, 68, ],
          '4th' => [68, 32, 56, 92, 67, 72, 45, 76, 48, 73, ],
          '5th' => [70, 58, 62, 88, 62, 68, 56, 63, 64, 78, ],
      ],
      'Jake' => [
          'test#1' => [62, 35, 48, 43, 56, 78, 32, 24, 29, ],
          'test#2' => [37, 92, 56, 36, 14, 86, 41, 58, 47, ],
          'test#3' => [49, 83, 0, 48, 64, 73, 50, 46, 38, 92, ],
          'test#4' => [53, 44, 34, 51, 74, 68, 53, 86, 24, 66, ],
          'test#5' => [83, 61, 55, 96, 87, 46, 21, 19, 88, 68, ],
      ],
      'Hugo' => [
          'test01' => [73, 36, 0, 11, 40, 76, 24, 46, 83, ],
          'test02' => [69, 42, 76, 8, 92, 84, 45, 34, 67, ],
          'test03' => [100, 46, 34, 77, 85, 47, 91, 85, 66, 79, ],
          'test04' => [0, 14, 32, 24, 54, 44, 56, 32, 59, 38, ],
          'test05' => [69, 84, 65, 42, 33, 80, 74, 54, 75, 56, ],
      ],
  ];
  
  $bp = new Boxplot();
  $bp->setDataset($dataSet)
     ->limit(0, 100)
     ->gridHeightPitch(20)
     ->gridVerticalOn()
     ->legendOn()
     ->meanOn()
     ->labelX('Achievement Test')
     ->labelY('Score')
     ->caption('Achievement Test Results in 2023')
     ->create(__DIR__ . '/img/MultipleDataSet.png');

• Result: examples/img/MultipleDataSet.png

  

• Details:

  • Set Data Set: setDataset(array $dataSet)
    • $dataSet: array<int|string, array<int|string, array<int|float>>>
  • The result of array_keys($dataSet) will be set as the legends.
    • In this case: [ 'John', 'Jake', 'Hugo', ] will be set as the legends.
  • The result of array_keys($dataSet[array_keys($dataSet)[0]]) will be set as the labels.
    • In this case: [ '1st', '2nd', '3rd', '4th', '5th', ] will be set as the legends.
  • legends(array $legends) can overwrite legends.
  • labels(array $labels) can overwrite labels.

You can adjust the display by using Neon file.

First, prepare a Neon file like this:

• Neon: examples/AdjustDisplayByNeon.neon

  # Configuration for BoxplotExample.php
  
  dataSet:
      'John': [
          1st: [75, 82, 96, 43, 78, 91, 84, 87, 93]
          2nd: [66, 74, 62, 100, 72, 68, 59, 76, 65]
          3rd: [56, 0, 45, 76, 58, 52, 13, 48, 54, 68]
          4th: [68, 32, 56, 92, 67, 72, 45, 76, 48, 73]
          5th: [70, 58, 62, 88, 62, 68, 56, 63, 64, 78]
      ]
      'Jake': [
          'test#1': [62, 35, 48, 43, 56, 78, 32, 24, 29]
          'test#2': [37, 92, 56, 36, 14, 86, 41, 58, 47]
          'test#3': [49, 83, 0, 48, 64, 73, 50, 46, 38, 92]
          'test#4': [53, 44, 34, 51, 74, 68, 53, 86, 24, 66]
          'test#5': [83, 61, 55, 96, 87, 46, 21, 19, 88, 68]
      ]
      'Hugo': [
          'test01': [73, 36, 0, 11, 40, 76, 24, 46, 83]
          'test02': [69, 42, 76, 8, 92, 84, 45, 34, 67]
          'test03': [100, 46, 34, 77, 85, 47, 91, 85, 66, 79]
          'test04': [0, 14, 32, 24, 54, 44, 56, 32, 59, 38]
          'test05': [69, 84, 65, 42, 33, 80, 74, 54, 75, 56]
      ]
  
  limitUpper: 100
  limitLower: 0
  
  #canvasWidth: 600
  #canvasHeight: 400
  canvasBackgroundColor: '#333399'
  #frameXRatio: 0.7
  #frameYRatio: 0.6
  
  axisColor: '#999999'
  axisWidth: 2
  
  #gridColor: '#cccccc'
  #gridWidth: 1
  
  gridHeightPitch: 10
  gridVertical: true
  
  #boxWidth: 20
  #boxBackgroundColors:
  #    - '#9999cc'
  #    - '#cc9999'
  #    - '#99cc99'
  #    - '#99cccc'
  #    - '#cc6666'
  #    - '#ffcc99'
  #    - '#cccc99'
  #    - '#cc99cc'
  #boxBorderColor: '#3333cc'
  #boxBorderWidth: 1
  
  whiskerColor: '#ffff00'
  #whiskerWidth: 1
  
  #fontPath: 'fonts/ipaexg.ttf' # IPA ex Gothic 00401
  #fontSize: 16
  fontColor: '#cccccc'
  
  outlier: true
  #outlierDiameter: 2
  #outlierColor: '#ff0000'
  
  #jitter: true
  #jitterColor: '#009900'
  #jitterDiameter: 2
  
  mean: true
  #meanColor: '#ff0000'
  
  #labels: [ '1st', '2nd', '3rd', '4th', '5th' ]
  labelX: 'Achievement Test'
  labelY: 'Score'
  caption: 'Adjusting the Display By Neon File'
  
  legend: true
  legendBackgroundColor: '#666666'
  #legends: [ 'John', 'Jake', 'Hugo', ]
  legendWidth: 100
  legendFontSize: 10
  
  # Default Color Set
  #colors:
  #    - '#9999cc'
  #    - '#cc9999'
  #    - '#99cc99'
  #    - '#99cccc'
  #    - '#cc6666'
  #    - '#ffcc99'
  #    - '#cccc99'
  #    - '#cc99cc'

Second, Code PHP like this:

• PHP: examples/AdjustDisplayByNeon.php

  <?php
  
  require_once __DIR__ . '/../vendor/autoload.php';
  
  use Macocci7\PhpBoxplot\Boxplot;
  
  $bp = new Boxplot();
  $bp->config(__DIR__ . '/AdjustDisplayByNeon.neon')
     ->create(__DIR__ . '/img/AdjustDisplayByNeon.png');

Then, run the PHP Code.

• Result: examples/img/AdjustDisplayByNeon.png

  

You can Adjust the Display by using Array.

• PHP: examples/AdjustDisplayByArray.php

  <?php
  
  require_once __DIR__ . '/../vendor/autoload.php';
  
  use Macocci7\PhpBoxplot\Boxplot;
  
  $conf = [
      'dataSet' => [
          'John' => [
              '1st' => [75, 82, 96, 43, 78, 91, 84, 87, 93, ],
              '2nd' => [66, 74, 62, 100, 72, 68, 59, 76, 65, ],
              '3rd' => [56, 0, 45, 76, 58, 52, 13, 48, 54, 68, ],
              '4th' => [68, 32, 56, 92, 67, 72, 45, 76, 48, 73, ],
              '5th' => [70, 58, 62, 88, 62, 68, 56, 63, 64, 78, ],
          ],
          'Jake' => [
              'test#1' => [62, 35, 48, 43, 56, 78, 32, 24, 29, ],
              'test#2' => [37, 92, 56, 36, 14, 86, 41, 58, 47, ],
              'test#3' => [49, 83, 0, 48, 64, 73, 50, 46, 38, 92, ],
              'test#4' => [53, 44, 34, 51, 74, 68, 53, 86, 24, 66, ],
              'test#5' => [83, 61, 55, 96, 87, 46, 21, 19, 88, 68, ],
          ],
          'Hugo' => [
              'test01' => [73, 36, 0, 11, 40, 76, 24, 46, 83, ],
              'test02' => [69, 42, 76, 8, 92, 84, 45, 34, 67, ],
              'test03' => [100, 46, 34, 77, 85, 47, 91, 85, 66, 79, ],
              'test04' => [0, 14, 32, 24, 54, 44, 56, 32, 59, 38, ],
              'test05' => [69, 84, 65, 42, 33, 80, 74, 54, 75, 56, ],
          ],
      ],
      'limitUpper' => 100,
      'limitLower' => 0,
      'canvasBackgroundColor' => '#333399',
      'axisColor' => '#999999',
      'axisWidth' => 2,
      'gridHeightPitch' => 10,
      'gridVertical' => true,
      'whiskerColor' => '#ffff00',
      'fontColor' => '#cccccc',
      'outlier' => true,
      'mean' => true,
      'labelX' => 'Achievement Test',
      'labelY' => 'Score',
      'caption' => 'Adjusting the Display By Array',
      'legend' => true,
      'legendBackgroundColor' => '#666666',
      'legendWidth' => 100,
      'legendFontSize' => 10,
  ];
  
  $bp = new Boxplot();
  $bp->config($conf)
     ->create(__DIR__ . '/img/AdjustDisplayByArray.png');

• Result: examples/img/AdjustDisplayByArray.png

  

You can set transparent background like this.

• PHP: examples/TransparentBackground.php

  <?php
  
  require_once __DIR__ . '/../vendor/autoload.php';
  
  use Macocci7\PhpBoxplot\Boxplot;
  
  $data = [
      '1st' => [75, 82, 96, 43, 78, 91, 84, 87, 93],
      '2nd' => [66, 74, 62, 100, 72, 68, 59, 76, 65],
      '3rd' => [56, 0, 45, 76, 58, 52, 13, 48, 54, 68],
      '4th' => [68, 32, 56, 92, 67, 72, 45, 76, 48, 73],
      '5th' => [70, 58, 62, 88, 62, 68, 56, 63, 64, 78],
  ];
  
  $bp = new Boxplot();
  
  $bp->setData($data)
     ->config([
      // This results in Transparent Background
      'canvasBackgroundColor' => null,
  ])
     ->limit(0, 100)
     ->gridHeightPitch(10)
     ->gridVerticalOn()
     ->outlierOn()
     ->meanOn()
     ->labelX('Examination')
     ->labelY('Score')
     ->caption('Transparent Background')
     ->create(__DIR__ . '/img/TransparentBackground.png');

• Result: examples/img/TransparentBackground.png

  

• BasicUsage.php >> results in:

  

• AdjustDisplayByMethods.php >> results in:

  

• AdjustDisplayByNeon.php >> results in:

  

• AdjustDisplayByArray.php >> results in:

  

• MultipleDataSet.php >> results in:

  

• TransparentBackground.php >> results in:

  

• NolanMcLeanBoxplot2025.php >> results in:

• BoxplotExampleCase.php >> results in:

  

MIT