Line Chart using ChartJS AngularJS and PHP MySQLi Database

January 3, 2021
PHP
line chart using chartjs angularjs php mysql

Tutorial: Line Chart using ChartJS, AngularJS and PHP MySQLi with Source Code

Getting Started

I’ve used CDN for Bootstrap, AngularJS and ChartJS, so you need an internet connection for them to work.

Creating our Database

First, we’re going to create our MySQL Database to fetch data, from:

1. Open phpMyAdmin.

2. Click databases, create a database and name it as angular.

3. After creating a database, click the SQL and paste the below codes. See image below for detailed instruction.

CREATE TABLE `sales` (
  `saleid` int(11) NOT NULL AUTO_INCREMENT,
  `amount` double NOT NULL,
  `sale_date` datetime NOT NULL,
PRIMARY KEY(`saleid`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
INSERT INTO `sales` (`saleid`, `amount`, `sale_date`) VALUES
(17, 50, '2018-01-01 16:00:00'),
(18, 600, '2018-02-01 16:00:00'),
(19, 50, '2018-02-04 16:00:00'),
(20, 700, '2018-03-02 16:00:00'),
(21, 350, '2018-04-03 16:00:00'),
(22, 100, '2018-05-04 16:00:00'),
(23, 650, '2018-06-05 16:00:00'),
(24, 250, '2018-07-06 16:00:00'),
(25, 200, '2018-08-07 16:00:00'),
(26, 450, '2018-09-08 16:00:00'),
(27, 750, '2018-10-09 16:00:00'),
(28, 800, '2018-11-10 16:00:00'),
(29, 150, '2018-12-11 16:00:00'),
(30, 50, '2018-01-06 16:00:00'),
(31, 50, '2018-01-16 16:00:00'),
(32, 40, '2018-01-01 16:00:00'),
(33, 10, '2018-01-21 16:00:00'),
(34, 250, '2017-01-04 16:00:00'),
(35, 800, '2017-02-01 16:00:00'),
(36, 500, '2017-03-02 16:00:00'),
(37, 750, '2017-04-03 16:00:00'),
(38, 550, '2017-05-04 16:00:00'),
(39, 100, '2017-06-05 16:00:00'),
(40, 300, '2017-07-06 16:00:00'),
(41, 750, '2017-08-07 16:00:00'),
(42, 700, '2017-09-08 16:00:00'),
(43, 50, '2017-10-09 16:00:00'),
(44, 400, '2017-11-10 16:00:00'),
(45, 550, '2017-12-11 16:00:00');
line chart using chartjs angularjs php mysql

index.html
This is an index which contains our add form and the chart itself.

<!DOCTYPE html>
<html ng-app="app">
<head>
    <title>Line Chart using ChartJS, AngularJS and PHP/MySQLi</title>
    <meta charset="utf-8">
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
    <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.5.7/angular.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.1/Chart.bundle.min.js"></script>
    <style type="text/css">
        canvas{
            margin:auto;
        }
        .alert{
            margin-top:20px;
        }
    </style>
</head>
<body ng-controller="myCtrl">
<div class="container">
    <div class="row">
        <div class="col-sm-3" ng-init="fetchfruit()">
            <h3 class="page-header text-center">Add Purchase</h3>
            <div class="form-group">
                <label>Amount:</label>
                <input type="text" class="form-control" ng-model="buy.amount">
            </div>
            <div class="form-group">
                <label>Date:</label>
                <input type="date" class="form-control" ng-model="buy.date">
            </div>
            <button type="button" ng-click="purchase()" class="btn btn-primary">Buy</button>
            <div class="alert alert-success text-center" ng-show="success">
                <button type="button" class="close" aria-hidden="true" ng-click="clear()">&times;</button>
                {{ message }}
            </div>
            <div class="alert alert-danger text-center" ng-show="error">
                <button type="button" class="close" aria-hidden="true" ng-click="clear()">&times;</button>
                {{ message }}
            </div>
        </div>
        <div class="col-sm-9" ng-init="fetchsales()">
            <h3 class="page-header text-center">Sales Chart</h3>
            <canvas id="dvCanvas" height="150" width="300"></canvas>
        </div>
    </div>
</div>
<script src="app.js"></script>
</body>
</html>

app.js

This contains an angular js scripts.

var app = angular.module('app', []);
 
app.controller('myCtrl', function ($scope, $http) {
 
    $scope.error = false;
    $scope.success = false;
 
    $scope.purchase = function(){
        $http.post('purchase.php', $scope.buy)
        .success(function(data){
            if(data.error){
                $scope.error = true;
                $scope.success = false;
                $scope.message = data.message;
            }
            else{
                $scope.success = true;
                $scope.error = false;
                $scope.message = data.message;
                $scope.fetchsales();
                $scope.buy = '';
            }
        });
    }
 
    //this fetches the data for our table
    $scope.fetchsales = function(){
        $http.get('fetchsales.php').success(function(data){
 
            var ctx = document.getElementById("dvCanvas").getContext('2d');
            var myChart = new Chart(ctx, {
                type: 'line',
                data: {
                    labels: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
                    datasets: [
                        {
                            label: '2017',
                            backgroundColor: 'red',
                            borderColor: 'red',
                            data: data.prev,
                            borderWidth: 1,
                            fill: false
                        },
                        {
                            label: '2018',
                            backgroundColor: 'skyblue',
                            borderColor: 'skyblue',
                            data: data.year,
                            borderWidth: 1,
                            fill: false
                        }
 
                    ]
                },
                options: {
                    responsive: true,
                    title:{
                        display:true,
                        text:'2017 vs 2018'
                    },
                    tooltips: {
                        mode: 'index',
                        intersect: false,
                    },
                    hover: {
                        mode: 'nearest',
                        intersect: true
                    },
                    scales: {
                        xAxes: [{
                            display: true,
                            scaleLabel: {
                                display: true,
                                labelString: 'Month'
                            }
                        }],
                        yAxes: [{
                            display: true,
                            scaleLabel: {
                                display: true,
                                labelString: 'Value'
                            },
                            ticks: {
                                beginAtZero:true
                            }
                        }]
                    }
                }
            });
 
        });
    }
 
    $scope.clear = function(){
        $scope.error = false;
        $scope.success = false;
    }
 
});

purchase.php

This is an PHP code/api that adds data into a MySQL database.

<?php
 
    $conn = new mysqli("localhost", "root", "", "angular");
 
    $out = array('error' => false);
 
    $data = json_decode(file_get_contents("php://input"));
 
    $amount = $data->amount;
    $date = $data->date;
 
    $sql = "INSERT INTO sales (amount, sale_date) VALUES ('$amount', '$date')";
    $query = $conn->query($sql);
 
    if($query){
        $out['message'] = "Purchase added successfully";
    }
    else{
        $out['error'] = true;
        $out['message'] = "Cannot add purchase"; 
    }
 
    echo json_encode($out);
 
?>

fetchsales.php

Lastly, this is an PHP api that fetches data from our database to be used in a chart.

<?php
 
    $conn = new mysqli("localhost", "root", "", "angular");
 
    //set timezone
    //date_default_timezone_set('Asia/Manila');
 
    $year = date('Y'); //2018
    $prev = $year - 1;
 
    $out = array();
 
    for ($month = 1; $month <= 12; $month ++){
        $sql="SELECT sum(amount) AS total FROM sales WHERE month(sale_date)='$month' AND year(sale_date)='$year'";
        $query=$conn->query($sql);
        $row=$query->fetch_array();
 
        $out['year'][]=$row['total'];
    }
 
    for ($month = 1; $month <= 12; $month ++){
        $sql="SELECT sum(amount) AS total FROM sales WHERE month(sale_date)='$month' AND year(sale_date)='$prev'";
        $pquery=$conn->query($sql);
        $prow=$pquery->fetch_array();
 
        $out['prev'][]=$prow['total'];
    }
 
    echo json_encode($out);
 
?>

That ends this tutorial. Happy Coding!

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