将PHP 7迁移到8-对象的构造函数不被调用

Question

我们需要将我们的在线商店从PHP7.x迁移到PHP8.x

我的主XAMPP文件夹正在运行PHP7.4.3，我已经将最新的XAMPP (8.1.6)安装到另一个文件夹中。

当我运行PHP 8实例时，主站点似乎运行得很好，但是购物篮对象似乎没有启动。

我可以分辨，因为我可以从PHP7中回显$cartid，但不是8。

我是否错过了需要编辑的配置选项，或者PHP8.x处理全局变量或对象的方式发生了一些变化？

basket.php

...

include ("sqlcart.php");

$cart = new basket;
...

sqlcart.php

class basket
{
    var $items;
    var $empty;
    var $cartid;
    var $voucher_id_set;

    function basket()
    {
        global $cartid;
        global $vat_rate;
        global $voucher_id_set;
        global $outmail;
        global $conn;
        global $_COOKIE;
        global $_POST;

        $voucher_id_set = 0;

        $number = 0;

        if (isset($_COOKIE["cart_id"])) {
            $cartid = ClearString(substr($_COOKIE["cart_id"], 0, 10));

            $testcartid = $cartid;
            settype($testcartid, "integer");

            if ($testcartid > 0) {
                $strsql = "SELECT * from g_tempbasket where basket_id = '" . clearstring(substr($cartid, 0, 10)) . "'";
                $result = safedb_query($strsql);
                $number = mysqli_num_rows($result);
            } else {
                $number = 0;
            }
        } else {
            // force cart creation
            $number = 0;
        }


        if ($number == 0) {

            $todaydate = date("Y-m-d h:i:s");
            $strsql = "INSERT INTO g_tempbasket (basket_id,date) ";
            $strsql .= "VALUES (NULL,'$todaydate')";

            safedb_query($strsql);

            $newcartid = mysqli_insert_id($conn);

            if ($outmail == 1) {
                setcookie("cart_id", $newcartid, time() + (24 * 3600), "", ".website.co.uk", 1);
                setcookie("voucher_id", "", 0, "", ".website.co.uk", 1);
            } else {
                setcookie("cart_id", $newcartid, time() + (24 * 3600));
                setcookie("voucher_id", "", 0);
            }
            $cartid = $newcartid;

        }

        $strsql = "SELECT t.product_id, p.descript, p.cost, t.qty ";
        $strsql .= "FROM g_tempbasket AS tb, g_product AS p, g_tempitems AS t ";
        $strsql .= "WHERE tb.basket_id = t.basket_id ";
        $strsql .= "AND t.product_id = p.product_id ";
        $strsql .= "AND tb.basket_id = " . $cartid;

        $result = safedb_query($strsql);
        $number = mysqli_num_rows($result);

        mysqli_free_result($result);

        //$this->items=$result;

        if ($number != 0) {
            $this->empty = false;
        } else {
            $this->empty = true;
        }
    } //function 

    function additem($id, $name, $addcount)
    {
        global $cartid;

        // Get product info to add
        $strsql = "SELECT descript, cost, no_vat FROM g_product ";
        $strsql .= "WHERE product_id = '" . $id . "'";
        $prodaddresult = safedb_query($strsql);
        $prodaddrow = mysqli_fetch_assoc($prodaddresult);
        $prodname = $prodaddrow["descript"];
        $prodcost = $prodaddrow["cost"];
        $prodnovat = $prodaddrow["no_vat"];
        
        $strsql = "SELECT qty FROM g_tempitems ";
        $strsql .= "WHERE basket_id = " . $cartid;
        $strsql .= " AND product_id = '" . $id . "'";

        $result = safedb_query($strsql);
        $number = mysqli_num_rows($result);

        $strsqls = "SELECT prod_code FROM g_ship_options ";
        $strsqls .= "WHERE prod_code =  '" . $id . "'";
        $sresult = safedb_query($strsqls);
        $snumber = mysqli_num_rows($sresult);

        if ($number == 0) {
            if ($id == "" || $addcount < 1) { // Basic anti-bot validation
                header("Location: index.php");
                exit;
            }
        if ($snumber != 0) { // Item is shipping - mark in basket
            $strsql = "INSERT INTO g_tempitems ";
            $strsql .= "(basket_id, product_id, qty, shipping, descript, cost, no_vat) ";
            $strsql .= "VALUES (".$cartid.", '".$id."', ".$addcount.", 1, '".$prodname."', '".$prodcost."', '".$prodnovat."')";
          } else { // Non-shipping item
              $strsql = "INSERT INTO g_tempitems ";
            $strsql .= "(basket_id, product_id, qty, shipping, descript, cost, no_vat) ";
              $strsql .= "VALUES (".$cartid.", '".$id."', ".$addcount.", 0, '".$prodname."', '".$prodcost."', '".$prodnovat."')";
        }
        } else {
      if ($id == "") { // Basic anti-bot validation
                header("Location: index.php");
                exit;
            }
        $currow = mysqli_fetch_assoc($result);
            $current = $currow["qty"];
        $new = $current + $addcount;
        if ($new <= 0) {
            $new = 1;
            }

            $strsql = "UPDATE g_tempitems ";
            $strsql .= "SET qty = ".$new.", ";
            $strsql .= "descript = '".$prodname."', ";
            $strsql .= "cost = ".$prodcost.", ";
            $strsql .= "no_vat = ".$prodnovat." ";
            $strsql .= "WHERE basket_id = ".$cartid." ";
            $strsql .= "AND product_id = '".$id."'";
        }
        mysqli_free_result($result);
        safedb_query($strsql);

        $this->empty = false;
    }

Answer 1

可能不相容的变化。从医生那里：

与类同名的

方法不再被解释为构造函数。应该使用__construct()方法。

来源：https://www.php.net/manual/en/migration80.incompatible.php