How to Make Table and Insert data from PHP MySQL JSON Dynamically in Flutter App
Introduction
————
In this digital age, mobile applications are becoming increasingly popular, and Flutter has emerged as a leading framework for building cross-platform apps. When it comes to storing and managing data, MySQL is a widely used database management system. In this blog post, we will explore how to create a table and insert data from PHP MySQL JSON dynamically in a Flutter app.
Step 1: Setting Up the Backend
To start, we need to set up our backend using PHP and MySQL. First, create a MySQL database and a table to store the data. Then, create a PHP file that will handle the JSON data and interact with the MySQL database.
Step 2: Creating the Table and Inserting Data
To create a table and insert data dynamically, we can use the following PHP code:
“`php
$servername = “localhost”;
$username = “username”;
$password = “password”;
$dbname = “dbname”;
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die(“Connection failed: ” . $conn->connect_error);
}
// Create table
$sql = “CREATE TABLE IF NOT EXISTS users (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
name VARCHAR(50),
email VARCHAR(50)
)”;
if ($conn->query($sql) === TRUE) {
echo “Table created successfully”;
} else {
echo “Error creating table: ” . $conn->error;
}
// Insert data
$name = $_POST[‘name’];
$email = $_POST[’email’];
$sql = “INSERT INTO users (name, email) VALUES (‘$name’, ‘$email’)”;
if ($conn->query($sql) === TRUE) {
echo “New record created successfully”;
} else {
echo “Error: ” . $sql . “
” . $conn->error;
}
$conn->close();
?>
“`
Step 3: Fetching Data from MySQL and Converting to JSON
To fetch data from MySQL and convert it to JSON, we can use the following PHP code:
“`php
$servername = “localhost”;
$username = “username”;
$password = “password”;
$dbname = “dbname”;
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die(“Connection failed: ” . $conn->connect_error);
}
$sql = “SELECT * FROM users”;
$result = $conn->query($sql);
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
$data[] = $row;
}
echo json_encode($data);
} else {
echo “0 results”;
}
$conn->close();
?>
“`
Step 4: Integrating with Flutter App
To integrate the PHP MySQL JSON data with our Flutter app, we can use the http package to make a GET request to the PHP file. Here is an example of how to do it:
“`dart
import ‘package:flutter/material.dart’;
import ‘package:http/http.dart’ as http;
import ‘dart:convert’;
class HomePage extends StatefulWidget {
@override
HomePageState createState() => HomePageState();
}
class _HomePageState extends State
Future _userData;
Future _getUserData() async {
final response = await http.get(Uri.parse(‘https://example.com/user_data.php’));
if (response.statusCode == 200) {
return jsonDecode(response.body);
} else {
throw Exception(‘Failed to load user data’);
}
}
@override
void initState() {
super.initState();
userData = getUserData();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(‘User Data’),
),
body: Center(
child: FutureBuilder(
future: _userData,
builder: (context, snapshot) {
if (snapshot.hasData) {
return ListView.builder(
itemCount: snapshot.data.length,
itemBuilder: (context, index) {
return ListTile(
title: Text(snapshot.data[index][‘name’]),
subtitle: Text(snapshot.data[index][’email’]),
);
},
);
} else if (snapshot.hasError) {
return Text(‘${snapshot.error}’);
}
return CircularProgressIndicator();
},
),
),
);
}
}
“`
Conclusion
———-
In this blog post, we have learned how to create a table and insert data from PHP MySQL JSON dynamically in a Flutter app. We have covered the steps to set up the backend using PHP and MySQL, create a table and insert data, fetch data from MySQL and convert it to JSON, and integrate the PHP MySQL JSON data with our Flutter app.
FAQ
—-
1. Q: What is the purpose of using JSON in this example?
A: The purpose of using JSON is to easily convert the PHP data into a format that can be easily parsed by the Flutter app.
2. Q: How do I handle errors when making a GET request to the PHP file?
A: You can use try-catch blocks to handle errors when making a GET request to the PHP file.
3. Q: Can I use other database management systems like MongoDB or PostgreSQL?
A: Yes, you can use other database management systems like MongoDB or PostgreSQL, but you would need to modify the PHP code to interact with the new database.
4. Q: How do I secure my PHP file from unauthorized access?
A: You can secure your PHP file by using authentication and authorization techniques like username and password or API keys.
5. Q: Can I use this method to update or delete data in the MySQL database?
A: Yes, you can use this method to update or delete data in the MySQL database by modifying the PHP code to handle UPDATE or DELETE queries.
