Backend Development
PHP Tutorial
How can I create Google Charts from MySQL data using PHP and JSON?
How can I create Google Charts from MySQL data using PHP and JSON?
Using PHP, MySQL, and JSON to Create Google Charts - A Comprehensive Guide
In this article, we'll explore a detailed guide on generating Google Charts using MySQL table data as the data source. We'll primarily focus on a non-Ajax example to simplify the understanding.
Requirements
Before we begin, ensure you have the following prerequisites:
- PHP
- Apache
- MySQL
Database Setup
- Create a database named "chart" using phpMyAdmin.
-
Create a table named "googlechart" with the following columns:
- weekly_task (string)
- percentage (number)
PHP Code
<?php
// Connect to the database
$con = mysql_connect("localhost", "username", "password");
mysql_select_db("chart", $con);
// Query the "googlechart" table
$sth = mysql_query("SELECT * FROM googlechart");
// Initialize the data table
$table = array();
$table['cols'] = array(
// Column labels
array('label' => 'Weekly Task', 'type' => 'string'),
array('label' => 'Percentage', 'type' => 'number')
);
// Populate the table with data from the query result
$rows = array();
while ($r = mysql_fetch_assoc($sth)) {
$temp = array();
$temp[] = array('v' => $r['weekly_task']);
$temp[] = array('v' => $r['percentage']);
$rows[] = array('c' => $temp);
}
$table['rows'] = $rows;
// Convert the table data to JSON format
$jsonTable = json_encode($table);
?>HTML and JavaScript
<html>
<head>
<script src="https://www.google.com/jsapi"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script>
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>Potential Error
You may encounter an error while using short tags (
syntax error var data = new google.visualization.DataTable(<?php echo $jsonTable; ?>);
To resolve this, use the following syntax instead:
<?php echo $jsonTable; ?>
Now, you have a comprehensive understanding of how to use PHP, MySQL, and JSON to create Google Charts from your database data.
The above is the detailed content of How can I create Google Charts from MySQL data using PHP and JSON?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
Alipay PHP SDK transfer error: How to solve the problem of 'Cannot declare class SignData'?
Apr 01, 2025 am 07:21 AM
Alipay PHP...
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
How does session hijacking work and how can you mitigate it in PHP?
Apr 06, 2025 am 12:02 AM
Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.
How to debug CLI mode in PHPStorm?
Apr 01, 2025 pm 02:57 PM
How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...
Describe the SOLID principles and how they apply to PHP development.
Apr 03, 2025 am 12:04 AM
The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.
How to automatically set permissions of unixsocket after system restart?
Mar 31, 2025 pm 11:54 PM
How to automatically set the permissions of unixsocket after the system restarts. Every time the system restarts, we need to execute the following command to modify the permissions of unixsocket: sudo...
Explain late static binding in PHP (static::).
Apr 03, 2025 am 12:04 AM
Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.
Framework Security Features: Protecting against vulnerabilities.
Mar 28, 2025 pm 05:11 PM
Article discusses essential security features in frameworks to protect against vulnerabilities, including input validation, authentication, and regular updates.
