How to send a POST request using Postman

When writing web development applications, we usually need to send HTTP requests from the front-end page to the back-end server. In such cases, Postman is a very powerful tool that can help us test whether our API interface is working properly. This article will introduce how to use Postman to send a POST request and pass an associative array to the PHP backend server.

1. Create a PHP file for receiving POST requests and processing associated arrays

<?php if ($_SERVER[&#39;REQUEST_METHOD&#39;] == &#39;POST&#39;) {
    $data = json_decode(file_get_contents("php://input"), true);
    var_dump($data);
}
?>

In the above code, we first check whether the request is a POST request, and then read it by reading php://input stream to obtain POST data. The json_decode function converts POST data into an associative array and uses the var_dump function to print the array.

2. Send a POST request in Postman and pass the associated array

1. Open Postman, click "New Request" in the upper left corner
2. Enter the above at the request URL The URL address of the PHP file
3. Select the request method as POST
4. Under the "Body" tab, select the "raw" format
5. Enter the following JSON data in the text editor ：

{
    "name": "John",
    "age": 30,
    "email": "john@gmail.com"
}

In the above JSON data, we created an associative array containing the three keys "name", "age" and "email".

6. Click the "Send" button to send the request

3. Run the PHP file and view the output results

1. Run the above PHP on the server file (if using a local server environment, just place the PHP file in the root directory of the web server)
2. After sending the request in Postman, you should be able to see the associative array var_dumped from the PHP file, as shown in the figure below View it in the "ResponseBody" column.

#If you can see the above associative array correctly, then you have successfully passed the associative array to the PHP backend server through Postman. In actual development, you can apply this method to process form data, user account information, etc. This is quite a useful trick for developers.

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