php - 如何在mysql中使用php变量获取结果

Question

$min_range=$_GET['min_range'];
$max_range=$_GET['max_range'];
$brand_name=$_GET['brand'];

$result=mysql_query(
    "
        SELECT 
            brand,
            image,
            price
        FROM 
            mobile
        WHERE 
            brand = '"$brand_name " 'price =3000
    "
);

我想在我的 sql 查询中使用 php 变量。这段代码有什么问题。以及如何纠正。

它说“解析错误：语法错误，意外（'$brand_name'）”

Answer 1

一种方法如下：

$result=mysql_query(
    "
        SELECT 
            brand,
            image,
            price
        FROM 
            mobile
        WHERE 
            brand = '" . $brand_name . "'
        AND
            price =3000
    "
);

另一种方法是：

$result=mysql_query(
    "
        SELECT 
            brand,
            image,
            price
        FROM 
            mobile
        WHERE 
            brand = '$brand_name'
        AND
            price = 3000
    "
);

另一种方式是这样的：

$result=mysql_query(
    sprintf(
        "
            SELECT 
                brand,
                image,
                price
            FROM 
                mobile
            WHERE 
                brand = '%s'
            AND
                price = 3000
        ",
        $brand_name
    )
);

另请注意，您的代码带有语法错误，请将 AND 运算符替换为满足您需求的运算符。

Answer 2

$result=mysql_query(
    "
        SELECT 
            brand,
            image,
            price
        FROM 
            mobile
        WHERE 
            brand = '.$brand_name.' AND price =3000
    "
);

Answer 3

将您的查询更改为

$result=mysql_query("SELECT brand,image,price FROM mobile WHERE brand='$brand_name' AND price=3000");

您实际上忘记了将条件分开。添加了一个AND关键字。

Answer 4

$result = $mysql->prepare("SELECT brand, image, price FROM mobile WHERE brand =? AND price=3000");

$result->bind_param($brand_name);

$result->execute();

Answer 5

你可以试试这个：

    $result=mysql_query(
    "
        SELECT brand, image, price
        FROM mobile
        WHERE 
            brand = '" . $brand_name . "' AND price = 3000
     ");

Answer 6

$result = mysql_query("SELECT brand,image,price FROM mobile WHERE brand = '$brand_name' AND price = 3000");