SQL SELECT使用会话变量

Question

Require("dbconnect.php");//works is used on other another page


echo $Customer_id;//Displays correctly 

有人可以帮忙吗？

Answer 1

将$sql.=行更改为：

$sql.= " WHERE Job_Customer_id = '$Customer_id'"

'周围的$Customer_id。

Answer 2

首先检查使用会话变量是否正在获取数据。 如果Customer id是varchar，那么在where子句中缺少单个倒置逗号。

session_start();
$Customer_id = $_SESSION['id'];

Require("dbconnect.php");//works is used on other another page
$sql = "SELECT Job_id FROM Job";
$sql.= " WHERE Job_Customer_id = '$Customer_id'";
$stmt = $dbh->query($sql);
$row = $stmt->fetch(PDO::FETCH_ASSOC);
$Job_id = $row['Job_id'];

echo $Customer_id;//Displays correctly 
echo $Job_id;//Curently dose not display anything