PHP MySQL Google Chart JSON - Complete Example
This question pertains to generating Google Charts using a combination of PHP and MySQL. The use of Ajax is not covered in this particular example.
Usage
Requirements
- PHP
- Apache
- MySQL
Installation
- Create a database named "chart" using phpMyAdmin.
- Create a table named "googlechart" with two columns: "weekly_task" and "percentage."
- Insert sample data into the table, ensuring that the "percentage" column contains only numbers.
Code Examples
PHP-MySQL-JSON-Google Chart Example
<?php
// Database connection
$con = mysql_connect("localhost", "Username", "Password");
mysql_select_db("Database Name", $con);
// Query
$sth = mysql_query("SELECT * FROM chart");
// Data preparation
$table['cols'] = array(
array('label' => 'Weekly Task', 'type' => 'string'),
array('label' => 'Percentage', 'type' => 'number')
);
$rows = array();
while ($r = mysql_fetch_assoc($sth)) {
$temp = array();
$temp[] = array('v' => (string)$r['Weekly_task']);
$temp[] = array('v' => (int)$r['percentage']);
$rows[] = array('c' => $temp);
}
$table['rows'] = $rows;
$jsonTable = json_encode($table);
// HTML
?>
<html>
<head>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script type="text/javascript">
google.load('visualization', '1', {'packages':['corechart']});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable(<?php echo $jsonTable; ?>);
var options = {
title: 'My Weekly Plan',
is3D: 'true',
width: 800,
height: 600
};
var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
</script>
</head>
<body>
<div>PHP-PDO-JSON-MySQL-Google Chart Example
<?php
// Database connection
$dbname = 'chart';
$username = 'root';
$password = '123456';
$conn = new PDO("mysql:host=localhost;dbname=$dbname", $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
// Query
$result = $conn->query('SELECT * FROM googlechart');
// Data preparation
$rows = array();
$table['cols'] = array(
array('label' => 'Weekly Task', 'type' => 'string'),
array('label' => 'Percentage', 'type' => 'number')
);
foreach ($result as $r) {
$temp = array();
$temp[] = array('v' => (string)$r['weekly_task']);
$temp[] = array('v' => (int)$r['percentage']);
$rows[] = array('c' => $temp);
}
$table['rows'] = $rows;
$jsonTable = json_encode($table);
// HTML
?>
<html>
<head>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script type="text/javascript">
google.load('visualization', '1', {'packages':['corechart']});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable(<?php echo $jsonTable; ?>);
var options = {
title: 'My Weekly Plan',
is3D: 'true',
width: 800,
height: 600
};
var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
</script>
</head>
<body>
<div>PHP-MySQLi-JSON-Google Chart Example
<?php
// Database connection
$DB_NAME = 'chart';
$DB_HOST = 'localhost';
$DB_USER = 'root';
$DB_PASS = '123456';
$mysqli = new mysqli($DB_HOST, $DB_USER, $DB_PASS, $DB_NAME);
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
// Query
$result = $mysqli->query('SELECT * FROM googlechart');
// Data preparation
$rows = array();
$table['cols'] = array(
array('label' => 'Weekly Task', 'type' => 'string'),
array('label' => 'Percentage', 'type' => 'number')
);
foreach ($result as $r) {
$temp = array();
$temp[] = array('v' => (string)$r['weekly_task']);
$temp[] = array('v' => (int)$r['percentage']);
$rows[] = array('c' => $temp);
}
$table['rows'] = $rows;
$jsonTable = json_encode($table);
// HTML
?>
<html>
<head>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script type="text/javascript">
google.load('visualization', '1', {'packages':['corechart']});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable(<?php echo $jsonTable; ?>);
var options = {
title: 'My Weekly Plan',
is3D: 'true',
width: 800,
height: 600
};
var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
</script>
</head>
<body>
<div>
Troubleshooting
If you encounter the following error:
syntax error var data = new google.visualization.DataTable(<?php echo $jsonTable; ?>);
This indicates that your environment does not support short tags. To resolve this issue, use this code instead:
<?php echo $jsonTable; ?>
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