Create Charts Using PHP and MongoDB

https://www.pluralsight.com/guides/create-charts-using-php-and-mongodb

Introduction

Most enterprise apps currently use relational databases like SQL, MariaDB, or MySQL due to their popularity and stable nature. However, developers face issues when they try to scale such databases. Furthermore, considering the recent breed of web applications that handle large data sets, developers are constantly looking for more scalable databases. This has attributed to the rise of non-relational (NoSQL) databases. One such database that has become really popular is MongoDB.

In this tutorial we will follow a step-by-step approach to create charts using data stored in a MongoDB database. We will use the PHP scripting language to connect to the database and fetch the data, which would then be used to render the chart.

We picked PHP over other similar languages because it comes with a MongoDB driver that connects it to the database. If you need to add more firepower in your web application, you can also use Node.js.

Prerequisites

For creating charts using PHP and MongoDB, you need the following to be downloaded and installed on your system:

XAMPP
MongoDB
PHP driver for MongoDB
Composer

Including Dependencies

To render FusionCharts in PHP using MongoDB, we need to include the following dependencies:

FusionCharts Suite XT: Download FusionCharts Suite XT zip file and store all the extracted script files in a new folder inside the project folder, as shown below.

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<html>
	<head>
		<!-- including FusionCharts core package JS files -->
	    <script src="path-to/fusioncharts.js"></script>
	    <script src="path-to/fusioncharts.theme.fint.js"></script>
	</head>
</html>

html

FusionCharts PHP Wrapper: Extract the FusionCharts PHP Wrapper and save the fusioncharts.php file inside the same folder created in the previous step for keeping the script files.

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<?php
	// including FusionCharts PHP wrapper
	require 'fusioncharts/fusioncharts.php';
?>

php

PHP Library for MongoDB (Details): Include the autoload.php file that is required for using MongoDB with PHP.

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<?php
	require 'vendor\autoload.php';
?>

php

Establishing and Validating Database Connection

Once we've added dependencies, we can establish the connection with our database to fetch data for the chart.

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<?php
$dbconn = new MongoDB\Client;

// validating DB connection
if(!$dbconn) {
	exit("There was an error establishing database connection");
}
?>

php

Fetching Data and Rendering the Chart

Now that we have established the connection to our database, we will fetch data for our chart.

Here's quick look at our chartData collection in myProject database which we will be using to render the chart.

Given below is the PHP code for fetching data from our database:

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// retrieving data from the database
$db = $dbconn->myProject;
$myObj = $db->chartData->find();

//convert MongoCursor into an array
$data=iterator_to_array($myObj);

// sorting the data
asort($data);

php

After the above code is executed successfully, $data will hold data fetched from our database. We will now form an associative JSON array for the chart.

FusionCharts understands both XML and JSON data formats. Since we will be using JSON, we will now append the data (fetched from database in the $data variable) along with FusionCharts chart configuration and parse the end result as an associative JSON array.

Given below is the PHP code needed to append the chart data fetched from the database:

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if ($data) {

    $categoryArray=array();

    $dataseries1=array();

    $dataseries2=array();

    foreach ($data as $dataset) {
        array_push($categoryArray, array(
            "label" => $dataset["month"]
        ));

        array_push($dataseries1, array(
            "value" => $dataset["petrol"]
        ));

        array_push($dataseries2, array(
            "value" => $dataset["diesel"]
        ));
    }


    $arrData = array(
        "chart" => array(
                "caption"=> "Comparison of Petrol and Diesel price",
                "xAxisname"=>"Month",
                "yAxisname"=>"Price",
                "numberPrefix"=>"$",
                "paletteColors"=> "#876EA1, #72D7B2",
                "useplotgradientcolor"=> "0",
                "plotBorderAlpha"=> "0",
                "bgColor"=> "#FFFFFFF",
                "canvasBgColor"=> "#FFFFFF",
                "showValues"=> "0",
                "showCanvasBorder"=> "0",
                "showBorder"=> "0",
                "divLineAlpha"=> "40",
                "divLineColor"=> "#DCDCDC",
                "alternateHGridColor"=> "#DCDCDC",
                "alternateHGridAlpha"=> "15",
                "labelDisplay"=> "auto",
                "baseFont"=> "Assistant",
                "baseFontColor"=> "#000000",
                "outCnvBaseFont"=> "Assistant",
                "outCnvBaseFontColor"=> "#000000",
                "baseFontSize"=> "13",
                "outCnvBaseFontSize"=> "13",
                "labelFontColor"=> "#000000",
                "captionFontColor"=> "#153957",
                "captionFontBold"=> "1",
                "captionFontSize"=> "20",
                "subCaptionFontColor"=> "#153957",
                "subCaptionfontSize"=> "17",
                "subCaptionFontBold"=> "0",
                "captionPadding"=> "20",
                "valueFontBold"=> "0",
                "showAxisLines"=> "1",
                "yAxisLineColor"=> "#DCDCDC",
                "xAxisLineColor"=> "#DCDCDC",
                "xAxisLineAlpha"=> "15",
                "yAxisLineAlpha"=> "15",
                "toolTipPadding"=> "7",
                "toolTipBorderColor"=> "#DCDCDC",
                "toolTipBorderThickness"=> "0",
                "toolTipBorderRadius"=> "2",
                "showShadow"=> "0",
                "toolTipBgColor"=> "#153957",
                "toolTipBgAlpha"=> "90",
                "toolTipColor"=> "#FFFFFF",
                "legendBorderAlpha"=> "0",
                "legendShadow"=> "0",
                "legendItemFontSize"=> "14"
        )
    );

    $arrData["categories"]=array(array("category"=>$categoryArray));

    // creating dataset object
    $arrData["dataset"] = array(array("seriesName"=> "Petrol_price", "data"=>$dataseries1), array("seriesName"=> "Diesel_price",  "data"=>$dataseries2));

    $jsonEncodedData = json_encode($arrData);

}

php

Every chart displayed on a web page is rendered within a unique HTML container. We will be using the <div> element for creating the HTML container for our chart.

Given below is the code for creating the chart container:

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<body>
	<div id="chart-container">Fusion Charts will render here</div>
</body>

html

Now that we have the JSON data and chart container in place, we will create the FusionCharts instance and call render method to render the chart.

Chart instance includes details needed to render the chart, like the chart type, chart ID, chart dimensions, the HTML container ID, and so on, will be passed to this chart instance.

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$msChart = new FusionCharts("msline", "demochart", "600", "400", "chart-container", "json", $jsonEncodedData);

$msChart->render();

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Conclusion

If you have followed the above steps, then you should have a working chart with you now. Your output should be like the image shown below:

If you are having trouble rendering the chart, you can download the source code from this GitHub repo.

Got questions? Feel free to say hi on Twitter! Thank you for reading!

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