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PHP - receive json POST request

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Created by:

Aran-Busby

592

In this article, we would like to show you how to receive json requests in PHP.

Parse JSON input stream example

Edit

backend.php file:

xxxxxxxxxx
 
<?php
​
    function parseInput()
    {
        $data = file_get_contents("php://input");
​
        if($data == false)
            return null;
​
        return json_decode($data);
    }
​
    if($_SERVER['REQUEST_METHOD'] === 'POST')
    {
        $data = parseInput();
​
        echo "  POST request method\n";
        echo "   + Name: " .  $data->name . "\n";
        echo "   + Age: " .  $data->age . "\n";
    }
    else
    {
        echo "Unsupported request method.";
    }

Note: to use different request method read this article.

ajax.htm file:

xxxxxxxxxx
 
<!doctype html>
<html lang="en">
<head>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
</head>
<body>
<pre id="response"></pre>
<script>
​
    var handle = document.getElementById('response');
​
    var data = {
        name: 'John',
        age: 25
    };
​
    $.ajax({
        type: 'POST',
        url: '/backend.php',
        data: JSON.stringify(data),
        success: function (data) {
            handle.innerHTML = 'Response:\n' + data;
        },
        error: function(error) {
            handle.innerText = 'Error: ' + error.status;
        }
    });
​
</script>
</body>
</html>