How To Implement Google Bar Chart Using Codeigniter

In this article, we will explain to you how to Implement Google bar Chart using Codeigniter. today we will fetch data into MySQL, and plot a Bar graph.

There are many types of charts provide by Google, like a bar chart, area chart, line chart, pie chart, etc. but here we use a bar chart.

In this article, we will plot a bar graph using Google API. so you can see below the following steps.

Overview

Step 1: Create a Database in table
Step 2: Connect to Database
Step 3: Create Controller
Step 4: Create View File

Step 1: Create a Database in table
In this step, we have to create a table in the database, so we will create a database using the below code.

CREATE TABLE `login_history` (
  `id` int(11) NOT NULL,
  `user_id` int(11) NOT NULL,
  `login_date` timestamp NOT NULL DEFAULT current_timestamp() ON UPDATE current_timestamp(),
   PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 AUTO_INCREMENT=1;

CREATE TABLE `login_history` (

`id` int(11) NOT NULL,

`user_id` int(11) NOT NULL,

`login_date` timestamp NOT NULL DEFAULT current_timestamp() ON UPDATE current_timestamp(),

PRIMARY KEY (`id`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 AUTO_INCREMENT=1;

Step 2: Connect to Database
Go to the config folder and open database.php file some changes in this file like hostname, database username, database password, and database name.

$db['default'] = array(
	'dsn'	=> '',
	'hostname' => 'localhost',
	'username' => 'root',
	'password' => '',
	'database' => 'enter here database name',
	'dbdriver' => 'mysqli',
	'dbprefix' => '',
	'pconnect' => FALSE,
	'db_debug' => (ENVIRONMENT !== 'production'),
	'cache_on' => FALSE,
	'cachedir' => '',
	'char_set' => 'utf8',
	'dbcollat' => 'utf8_general_ci',
	'swap_pre' => '',
	'encrypt' => FALSE,
	'compress' => FALSE,
	'stricton' => FALSE,
	'failover' => array(),
	'save_queries' => TRUE
);

$db['default'] = array(

'dsn' => '',

'hostname' => 'localhost',

'username' => 'root',

'password' => '',

'database' => 'enter here database name',

'dbdriver' => 'mysqli',

'dbprefix' => '',

'pconnect' => FALSE,

'db_debug' => (ENVIRONMENT !== 'production'),

'cache_on' => FALSE,

'cachedir' => '',

'char_set' => 'utf8',

'dbcollat' => 'utf8_general_ci',

'swap_pre' => '',

'encrypt' => FALSE,

'compress' => FALSE,

'stricton' => FALSE,

'failover' => array(),

'save_queries' => TRUE

);

Step 3: Create Controller
In this step, we will create a Googlechart.php file in the “application/controller” directory and paste the below code in this controller. here we will fetch the last 10 months of data from the database and month-wise count login users. that data will be pass in a chart and creating a bar graph.
application/controller/Googlechart.php

<?php
 
defined('BASEPATH') OR exit('No direct script access allowed');
 
class Googlechart extends CI_Controller {
 
    public function __construct() {
        parent::__construct();
        // load model
        $this->load->database();
        $this->load->helper(array('url','html','form'));
    }       
    public function bar_chart() {
      $query =  $this->db->query('SELECT DATE_FORMAT(login_date, "%Y-%m-%d") AS `date`, COUNT(`login_date`) as count FROM login_history WHERE `login_date` >= NOW() - INTERVAL 10 MONTH GROUP BY MONTH(`login_date`) ORDER BY `login_date` ASC'); 
      $records = $query->result_array();
      $data = [];
      $data['chart_data'] = $records;
      $this->load->view('bar_chart',$data);
    }

}
?>

<?php

defined('BASEPATH') OR exit('No direct script access allowed');

class Googlechart extends CI_Controller {

public function __construct() {

parent::__construct();

// load model

$this->load->database();

$this->load->helper(array('url','html','form'));

}

public function bar_chart() {

$query = $this->db->query('SELECT DATE_FORMAT(login_date, "%Y-%m-%d") AS `date`, COUNT(`login_date`) as count FROM login_history WHERE `login_date` >= NOW() - INTERVAL 10 MONTH GROUP BY MONTH(`login_date`) ORDER BY `login_date` ASC');

$records = $query->result_array();

$data = [];

$data['chart_data'] = $records;

$this->load->view('bar_chart',$data);

}

Step 4: Create View File
So finally, we will create the bar_chart.php file in the “application/views/” directory.
application/views/bar_chart.php

<!Doctype html>
<html>
<head>
  <title>How to Implement Google bar Chart using Codeigniter - XpertPhp</title>
  <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script> 
  <script type="text/javascript">
      google.charts.load('visualization', "1", {
          packages: ['corechart']
      });
  </script>
</head>
<body>
<div id="bar_date_wise" style="width: 900px; height: 500px; margin: 0 auto"></div>
<script language="JavaScript">
  // Draw the Bar chart 
  google.charts.setOnLoadCallback(barChart);   
    // for year wise
  function barChart() {
 
    /* Define the chart to be drawn.*/
    var data = google.visualization.arrayToDataTable([
        ['Date', 'Users Count'],
        <?php 
         foreach ($chart_data as $row){
         echo "['".$row['date']."',".$row['count']."],";
         }
         ?>
    ]);
    var options = {
        title: 'Day Wise Count Login Users Of Current Month',
        is3D: true,
    };
    /* Instantiate and draw the chart.*/
    var chart = new google.visualization.BarChart(document.getElementById('bar_date_wise'));
    chart.draw(data, options);
  }
</script>
</body>
</html>

<!Doctype html>

<html>

<head>

<title>How to Implement Google bar Chart using Codeigniter - XpertPhp</title>

google.charts.load('visualization', "1", {

packages: ['corechart']

});

</script>

</head>

<body>

// Draw the Bar chart

google.charts.setOnLoadCallback(barChart);

// for year wise

function barChart() {

/* Define the chart to be drawn.*/

var data = google.visualization.arrayToDataTable([

['Date', 'Users Count'],

<?php

foreach ($chart_data as $row){

echo "['".$row['date']."',".$row['count']."],";

}

]);

var options = {

title: 'Day Wise Count Login Users Of Current Month',

is3D: true,

};

/* Instantiate and draw the chart.*/

var chart = new google.visualization.BarChart(document.getElementById('bar_date_wise'));

chart.draw(data, options);

}

</script>

</body>

</html>

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