Question

$sql = "INSERT INTO user_saving_plans (user_id, catergory_id, product_id, savings_amount, company) VALUES (' . $_SESSION['user_id'] . ', '1', ' .    $row['product_id'] . ', ' . $saving . ', ' . $row['company'] . ')";

$retval = mysql_query( $sql, $connection );
    if(! $retval ){
        die('Could not enter data: ' . mysql_error());

}
        echo "Entered data successfully\n";

尝试使用字符串将行插入表中。继续得到语法错误。

当前错误是：

解析错误：语法错误，意外T_ENCAPSED_AND_WHITESPACE，期待T_STRING或T_VARIABLE或T_NUM_STRING

Answer 1

你应该总是以下面的方式准备你的变量，这是一个很好的做法：

    $userId = $_SESSION['user_id'];
    $productId = $row['product_id'];
    $company = $row['saving'];
    $categoryId = 1;
    $savingAmount = $saving;

    $sql = "INSERT INTO user_saving_plans (user_id, catergory_id, product_id, 
    savings_amount, company) 
    VALUES ('$userId', 'categoryId', '$productId', '$savingAmount', '$company')";

Answer 2

您正在混合quotes，

$sql = "INSERT INTO user_saving_plans (user_id, catergory_id, product_id, savings_amount,   
        company) VALUES ('" . $_SESSION['user_id'] . "', '1', '" .    $row['product_id'] .  
        "', '" . $saving . "', '" . $row['company'] . "')";

警告： Please, don't use mysql_* functions in new code。它们不再被维护and are officially deprecated。请参阅red box？转而了解prepared statements，并使用PDO或MySQLi - this article将帮助您确定哪个。如果您选择PDO here is a good tutorial。

Answer 3

你错误地将你的字符串连接起来了。你想要的是这个：

$sql = "INSERT INTO user_saving_plans (user_id, catergory_id, product_id, savings_amount, company) VALUES ('" . $_SESSION['user_id'] ." ', '1', '" .    $row['product_id'] . "', '" . $saving . "', '" . $row['company'] . "')";

或者你可以简单地用大括号（{}）包装它，如下所示：

$sql = "INSERT INTO user_saving_plans (user_id, catergory_id, product_id, savings_amount, company) VALUES ('{$_SESSION['user_id']} ', '1', '{$row['product_id']}', '$saving ', '{$row['company']}')";

Answer 4

$sql = "INSERT INTO user_saving_plans (user_id, catergory_id, product_id, savings_amount, company) VALUES (' $_SESSION[user_id] ', '1', ' $row[product_id] ', ' $saving ', ' $row[company] ')";

Answer 5

您的查询不正确。尝试

$sql = "INSERT INTO user_saving_plans (user_id, catergory_id, product_id, 
        savings_amount, company) VALUES ('". $_SESSION['user_id']."',1,
        '". $row['product_id'] ."', '". $saving . "', '". $row['company'] ."')";

Answer 6

您必须使用双引号结束字符串

$sql = "INSERT INTO user_saving_plans (user_id, catergory_id, product_id, savings_amount, company) VALUES ('" . $_SESSION['user_id'] . "', '1', '" .    $row['product_id'] . "', '" . $saving . "', '" . $row['company'] . "')";

如何解析字符串以将行插入mysql表？

6 个答案: