[Rise]

hrundel,

<form id="myForm">
	<input type="hidden" name="myHidden" value="myHiddenValue">
	Ваше имя: <input type="text" name="myName" value="myNameValue"><br>
	Ваш возраст: <input type="text" name="myAge" value="myAgeValue"><br>
	<input type="button" name="myButton1" value="myButton1value">
	<input type="button" name="myButton2" value="myButton2value">
	<input type="button" name="myButton3" value="myButton3value">
</form>

<script>
$('#myForm input[type=button]').click(function() {
	$.ajax({
		type: 'POST',
		url: '/add.php',
		data: $('#myForm').serialize() + '&' + this.name + '=' + this.value,
		success: function(data) {
			console.log(data);
		}
	});
});
</script>

add.php:

<?php echo implode(',', $_POST); ?>