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JavaScript - how to make jQuery AJAX POST request with PHP?

2 points
Created by:
Kate_C
19800

1. Overview

In JavaScript it is possible to make AJAX POST request with jQuery to PHP backend in following way.

2. jQuery AJAX POST request to PHP backend example

ajax.htm file:

<!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');

    $.ajax({
        type: 'POST',
        url: '/backend.php',
        data: {
            name: 'John',
            age: 25
        },
        success: function (data) {
            handle.innerHTML = 'Response:\n' + data;
        },
        error: function (jqXHR) {
            handle.innerText = 'Error: ' + jqXHR.status;
        }
    });

</script>
</body>
</html>

backend.php file:

<?php

	if ($_SERVER['REQUEST_METHOD'] === 'POST')
	{
		echo "  Sent data to backend:\n";
		echo "   + Name: " . $_POST['name'] . "\n";
		echo "   + Age: " . $_POST['age'] . "\n";
	}
	else
	{
		echo "  Incorrect request method!";
	}

Note: ajax.htm and backend.php files should be placed on php server both.

Result:

jQuery AJAX POST request to PHP backend
jQuery AJAX POST request to PHP backend

3. jQuery AJAX POST request with alternative API to PHP backend example

ajax.htm file:

<!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
    };

    $.post('/backend.php', data)
        .done(function (data) {
            handle.innerHTML = 'Response:\n' + data;
        })
        .fail(function (jqXHR) {
            handle.innerText = 'Error: ' + jqXHR.status;
        });

</script>
</body>
</html>

backend.php file:

<?php

	if ($_SERVER['REQUEST_METHOD'] === 'POST')
	{
		echo "  Sent data to backend:\n";
		echo "   + Name: " . $_POST['name'] . "\n";
		echo "   + Age: " . $_POST['age'] . "\n";
	}
	else
	{
		echo "  Incorrect request method!";
	}

Note: ajax.htm and backend.php files should be placed on php server both.

Result:

jQuery AJAX POST request with alternative API to PHP backend
jQuery AJAX POST request with alternative API to PHP backend

References

  1. jQuery.post method - jQuery Docs 

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