How to use PHP database connection to handle asynchronous data insertion
When developing websites and applications, it is often necessary to handle a large number of data insertion operations. In some cases, data insertion operations may need to occur in the background to avoid delays in user interface response. PHP provides a technology called asynchronous data insertion, which can handle data insertion operations in the background to improve user experience.
In this article, we will learn how to handle asynchronous data insertion using PHP database connection.
Step 1: Create a database connection
First, we need to create a database connection in the PHP file. You can use PHP's built-in function mysqli_connect()
to create a connection to the database. Here is an example:
$conn = mysqli_connect("localhost", "username", "password", "database");
In the above code, we replaced localhost
with your database server address and username
with your database username, Replace password
with your database password and database
with the name of the database you want to connect to.
Step 2: Get POST request data
In asynchronous data insertion, POST request is usually used to send data to the background. We can obtain this data through the $_POST
global variable.
Here is an example:
$name = $_POST['name']; $email = $_POST['email'];
In the above code, we get the POST data named name
and email
and put Its value is assigned to the corresponding variable.
Step 3: Write a SQL insert statement
Next, we need to write a SQL insert statement to insert the POST data into the database.
Here is an example:
$sql = "INSERT INTO users (name, email) VALUES ('$name', '$email')";
In the above code, we use the INSERT INTO
statement to combine name
and email## The value of # is inserted into the table named
users.
mysqli_query() to execute the SQL insert statement.
$result = mysqli_query($conn, $sql);
$conn and the SQL insert statement we wrote
$ sqlPerform the insert operation.
if($result) { echo "数据成功插入到数据库中"; } else { echo "插入操作失败,请重试"; }
XMLHttpRequest object to send a POST request and send the data to the background for processing. Here is an example:
var xhr = new XMLHttpRequest(); xhr.open("POST", "insert.php", true); xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); xhr.onreadystatechange = function() { if (xhr.readyState === 4 && xhr.status === 200) { console.log(xhr.responseText); } }; xhr.send("name=John&email=john@example.com");
send() method to send the data to the background.
The above is the detailed content of How to handle asynchronous data insertion using PHP database connection. For more information, please follow other related articles on the PHP Chinese website!