Question

//我想插入价值为i9-7820aa的$ product我知道bind_param可能是四种类型之一i - 整数d - 双精度 - 字符串b - BLOB 我得到了这个错误mysqli_stmt :: bind_param（）：变量数与预备语句中的参数数量不匹配

$product = 'i9-7820aa'; 
$name = mysqli_real_escape_string($connect, $_POST['nickname']);
$show = mysqli_real_escape_string($connect, $_POST['show']);

$stmt = $connect->prepare("INSERT INTO my (page) // insert in sql
        VALUES('$product')");
    $stmt->bind_param("sss", $product, $name, $show);
    $stmt->execute();

Answer 1

绑定时必须使用占位符。没有它们，你没有做任何事情

在这里，您绑定了三个变量。因此，您需要为每个占位符设置三个占位符，然后在bind_param函数中添加变量。

有关详细信息，请查看此this

$product = 'i9-7820aa'; 
$name = $_POST['nickname'];// you do not need to escape anything
$show = $_POST['show'];


    $stmt = $connect->prepare("INSERT INTO my (page) // insert in sql
            VALUES(?,?,?)");//we add three placeholders
        $stmt->bind_param("sss", $product, $name, $show);// s stands for string, i stands for int, 
        $stmt->execute(); // returns true/false

我如何在bind_param中将其声明为字符串

1 个答案: