In this article, we will focus on the mysqli_ping() function in PHP, which is used to check if a connection to the MySQL server is active.

Introduction to the mysqli_ping() function

The mysqli_ping() function is a built-in function in PHP that is used to check if a connection to the MySQL server is active. This function can be used to check if a connection has gone down and then re-establish it if needed.

How to use the mysqli_ping() function

Using the mysqli_ping() function is straightforward. Here's an example:

$mysqli = new mysqli("localhost", "username", "password", "database");

if ($mysqli->connect_errno) {
    echo "Failed to connect to MySQL: " . $mysqli->connect_error;

if ($mysqli->ping()) {
    echo "Connection is OK!";
} else {
    echo "Error: " . $mysqli->error;


In this example, we first create a new MySQLi object using the mysqli() constructor. We then check if the connection was successful using the connect_errno property. If the connection was successful, we check if the connection is active using the ping() method. If the connection is active, we print a message indicating that the connection is OK. If the connection is not active, we print an error message.


In conclusion, the mysqli_ping() function is a powerful tool for checking if a connection to the MySQL server is active. By understanding how to use the function, you can ensure that your PHP application is always connected to the MySQL server and avoid any issues that may arise from a lost connection.

Practice Your Knowledge

What is the purpose of a ping in PHP?

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