PHP headers_list() Function: Everything You Need to Know

As a PHP developer, you may need to obtain a list of the HTTP headers that have been sent to the client. The headers_list() function is a built-in function in PHP that allows you to retrieve a list of the HTTP headers that have been sent. In this article, we will take an in-depth look at the headers_list() function and its usage.

What is the headers_list() Function?

The headers_list() function is a PHP built-in function that allows you to retrieve a list of the HTTP headers that have been sent to the client.

How to Use the headers_list() Function

Using the headers_list() function is straightforward. Here is the syntax of the function:

headers_list();

The function does not take any parameters.

Here is an example of how to use the headers_list() function to retrieve a list of the HTTP headers that have been sent to the client:

<?php

$headers = headers_list();
foreach ($headers as $header) {
    echo $header . "<br>";
}

In this example, we retrieve a list of the HTTP headers that have been sent to the client using the headers_list() function. We then iterate over the list and display each header on the screen.

Conclusion

The headers_list() function is a useful tool for obtaining a list of the HTTP headers that have been sent to the client in your PHP web application. By understanding the syntax and usage of the function, you can easily retrieve a list of the headers that you need for your PHP application. We hope this article has been informative and useful in understanding the headers_list() function in PHP.