函数在 PHP $_GET[] 中不起作用

Question

我正在制作一个小型目录，它将在 SQL 数据库中获取产品列表并将它们列在 catalogue.php 页面上。当您点击某个产品时，您将被带到包含该特定产品的页面。所以我有一个 productbuild.php，它是构建目录和单个产品的 class。单个产品位于 productview.php。我可以在目录页面上查看产品，但不能在产品视图页面上查看。

这是我的 class:

require_once('connect.php');

        class Catalogue {   

            public $ksdb = '';


        public function __construct() {
            $this->ksdb = new Database;

            }
    //This function gets all the products on the main catalogue page, it works fine
            public function getProds() {
                $id = 0;
                //This is the prod array that is not being passed
                $prod = $return = array();
                $querystr = $this->ksdb->db_connect->prepare("SELECT * FROM products"); 
                try {
                    $querystr->execute();
                    for($i=0; $row = $querystr->fetch(); $i++) {
                        $return[$i] = array();
                        foreach($row as $rowi => $rowitem) {
                            $return[$i][$rowi] = $rowitem;

                        }
                    }
                } catch (PDOException $e) {
                    echo $e->getMessage();
                }
                return $return;
                //$prod = $return;
            }   



//This is the one that is not working on the productview.php page
            public function viewProd($prodID) {
                $prod = $return = array();
                $querystr = $this->ksdb->db_connect->prepare("SELECT * FROM products WHERE ID= ?");
                try {
                    $querystr->execute(array($id));
                    for ($i = 0; $row = $querystr->fetch(); $i++) {
                        $return[$i] = array();
                        foreach($row as $rowi => $rowitem) {
                            $return[$i][$rowi] = $rowitem;
                        }
                    }
                } catch(PDOException $e) {
                    echo $e->getMessage();
                }
                $prod = $return;
                $prod[0]['Description'] = $prod[0]['Description'];
                }
        }

这是我的 productview.php 页面：

//Include the class
<?php include_once('/productbuild.php');

//Create an object of catalogue
$viewproduct = new Catalogue;


//if there is something in productview.php?ID= viewProd function is called
if(!empty($_GET['ID'])) {
    $prod = $viewproduct->viewProd($_GET['ID']);
    }
    else {
    echo "No Products";
    }

?>

//Echo the product name (from the DB) and Description
<h3><?php echo htmlspecialchars($prod['Name']); ?></h3>
  <?php echo htmlspecialchars($prod['Description']); ?>

Answer 1

如何更改您的 viewProd 函数

$querystr->execute(array($id));

到

$querystr->execute(array($prodID))

如果这能解决您的问题，请告诉我。

函数在 PHP $_GET[] 中不起作用

Function not working in PHP $_GET[]

php

mysql

get