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I’m making an online store and I’m having trouble making the cart, when I click on the icon to add to cart, it doesn’t matter and the cart always appears empty.
And the result:
This is the button code
include ("db.php");
$molcomp_query="SELECT * FROM stock_comp WHERE (diametroaco BETWEEN '$d1' and '$d2') AND (comprimentototal BETWEEN '$comp1' AND '$comp2') AND (diametroexterior BETWEEN '$de1' AND '$de2') $ordenar_por";
$run_query = mysqli_query($con,$molcomp_query);
if (mysqli_num_rows($run_query) > 0){
foreach($run_query as $row){
//while($row = mysqli_fetch_array($run_query)){
$id_mol_comp=$row['id_mol_comp'];
$referencia=$row['referencia'];
$diametroaco=$row['diametroaco'];
$comprimentototal=$row['comprimentototal'];
$diametroexterior=$row['diametroexterior'];
$passo=$row['passo'];
$preco=$row['preco'];
echo
"<div class='card mx-auto w-100'>
<div class='card-body'>
<div class='row'>
<div class='col-md-1' style='text-align: center'>$referencia</div>
<div class='col-md-2' style='text-align: center'>$diametroaco</div>
<div class='col-md-2' style='text-align: center'>$comprimentototal</div>
<div class='col-md-2' style='text-align: center'>$diametroexterior</div>
<div class='col-md-1' style='text-align: center'>$passo</div>
<div class='col-md-1' style='text-align: center'>$preco €</div>
<div class='col-md-2' style='text-align: center'><i style='font-size:30px' class='fa'></i>      
<a class='fa fa-cart-plus' style='font-size:30px' href='carrinho.php?add=carrinho&id= '".$row['id_mol_comp']."'></a> </div>
</div>
</div>
</div>
";
}
}This is the cart code:
<!DOCTYPE html>
<?php session_start();
?>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="author" content="">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<!-- Bootstrap core CSS -->
<link rel="stylesheet" type="text/css" media="screen" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css" integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb" crossorigin="anonymous" />
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<script src="//ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="//stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.bundle.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="main.js"></script>
<style>
h3 {
color:#1751A3;
}
</style>
</head>
<body>
<div class="container-fluid">
<?php
if (!isset($_session['itens'])){
$_SESSION['itens']=array();
}
if(isset($GET['add'])&& $GET['add']=="carrinho") {
$idproduto = $GET['id'];
if(!isset($_session['itens'][$idproduto])){
$_session['itens'][$idproduto]=1;
}else{
$_session['itens'][$idproduto]+=1;
}
}
if (count($_SESSION['itens'])==0){
echo'Carrinho vazio <br><a href="mol_compressao.php">Adicionar Itens</a>';
}else{
echo"
<h3>Carrinho de Compras</h3>
<div align='center'>
<div class='card mx-auto w-75'>
<div class='container-fluid''>
<div class='row align-items-end' style='height:40px;'>
<div class='col-md-2' style='text-align: center'>REFERÊNCIA</div>
<div class='col-md-3' style='text-align: center'>QUANTIDADE</div>
<div class='col-md-2' style='text-align: center'>PREÇO UNITÁRIO</div>
<div class='col-md-2' style='text-align: center'>PREÇO TOTAL</div>
</div>
</div>
<hr>
<div class='card-body' >
<div class='row align-items-end' style='height:0px;'>
<div class='col-md-10' style='text-align: center'>Total:</div>
<div class='col-md-2' style='text-align: center'>ef</div>
</div>
</div>
</div>
</div>
";
include ("db.php");
foreach($_session['itens'] as $produtos => $quantidade){
$select=$con->prepare("select * from stock_comp where id=?");
$select->bindparam(1,$idproduto);
$select->execute();
$fetch=$select->fetchAll();
echo"
$precototal=$preco*$quantidade
<div class='card-body'>
<div class='row align-items-center' style='height:0px;'>
<div class='col-md-2' style='text-align: center'>$Referencia</div>
<div class='col-md-3' style='text-align: center'>$quantidade</div>
<div class='col-md-3' style='text-align: center'></div>
<div class='col-md-3' style='text-align: center'><input type='text' name='de2' size='1' ><i style='font-size:24px' class='fa'></i><i style='font-size:24px' class='fa'></i></div>
<div class='col-md-2' style='text-align: center'>$preco</div>
<div class='col-md-2' style='text-align: center'>$precototal</div>
</div>
</div>
<hr>";
}
}
?>
</div>
</body>
</html>No error, but it also shows nothing.