Get id attribute from button and send by AJAX - php

Question

$(document).ready(function() {
$(".eliminar").click(function(e) {
e.preventDefault();
var id = $(this).attr('data-id');
//alert(id);
$(this).closest('.holder-cesta').remove();
$.post('./php/carro_compra/eliminar.php', {
Id:id
},function(a) {
if (a=='0') {
location.href="./cesta";
}
});
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div class="holder-cesta">
<h4>Product 1</h4>
<button class="eliminar" data-id="1">Delete</button>
</div>
<div class="holder-cesta">
<h4>Product 3</h4>
<button class="eliminar" data-id="3">Delete</button>
</div>
<div class="holder-cesta">
<h4>Product 2</h4>
<button class="eliminar" data-id="2">Delete</button>
</div>
I'm creating the button to remove the added products.
Every product added in the cart, will have a delete button.
So my question is, how can i get the id by clicking the delete button.
I was do something like this:
if (isset($_SESSION['carrito'])) {
//Array con datos carrito.
$data = $_SESSION['carrito'];
$total = 0;
for ($i=0; $i<count($data); $i++) {
<div class="holder-cesta">
<h4><?php echo $data[$i]['Titulo']; ?></h4>
<button class="eliminar" data-id="<?php echo $data[$i]['Id']; ?>"><i class="fa fa-trash-o" aria-hidden="true"></i></button>
</div>
<?php
}
} else {
echo "0 articulos";
} unset($arreglo);
?>
My jQuery script look like this:
$(document).ready(function() {
//Button click function.
$(".eliminar").click(function(e) {
e.preventDefault();
//Get the id attribut.
var id = $(this).attr('data-id');
//alert(id); (The alert work perfect).
//Remove the parent holder.
$(this).closest('.holder-cesta').remove();
//Control AJAX
$.post('http://domain.com/php/carro_compra/eliminar.php', {
Id:id
},function(a) {
if (a=='0') {
location.href="./cesta";
}
});
});
});
But i don´t get the ID in my eliminar.php, if i do something like this, it always ignored:
if ($arreglo[$i]['Id'] != $_POST['Id']) {
}
So $_POST['Id'], get nothing from AJAX. If i put the id manual, it work pretty.
Here i include the eliminar.php
<?php
//Session start
session_start();
//Get shoping cart data.
$arreglo = $_SESSION['carrito'];
//Reset.
$arr[] ='';
for ($i=0; $i<count($arreglo); $i++) {
if ($arreglo[$i]['Id']!= $_POST['Id']) {
$datosnuevos = ['Id' => $arreglo[$i]['Id'], 'Titulo' =>$arreglo[$i]['Titulo'], 'Precio' => $arreglo[$i]['Precio'], 'Icon' => $arreglo[$i]['Icon'], 'Cantidad' => $arreglo[$i]['Cantidad'] ];
$arr[] = $datosnuevos;
}
}
if (isset($arr)) {
$_SESSION['carrito'] = $arr;
$data = $_SESSION['carrito'];
$value_carrito = count($data);
$_SESSION['compras'] = $value_carrito;
echo "<script>window.location.reload();</script>";
} else {
unset($_SESSION['carrito']);
unset($_SESSION['compras']);
echo "0";
}
?>