根據會話選擇

Question

如何從用戶名基於會話的數據庫中選擇值？

這是我到目前爲止有：

$query = mysql_query ("select id from CUSTOMER where username = .$_SESSION['username'] "); 

Answer 1

$query = mysql_query("select id from CUSTOMER where username = '".$_SESSION['username']."'"); 

Answer 2

如果用戶名是在會話cookie然後抓住用戶名就像在你的查詢這個

$username = $_SESSION['username']; 
$escuname = mysql_real_escape_string($username); 
$query = mysql_query("select id from CUSTOMER where username = '".$escuname."' LIMIT 1"); 

Answer 3

Session變量沒有解析正常。你可以使用大護腕語法修復：

$query = mysql_query("select id from CUSTOMER where username = '{$_SESSION[ "username" ]}'"); 

或使用點運算符串連它：

$query = mysql_query ("select id from CUSTOMER where username = '" . $_SESSION[ "username" ] . "'"); 

你可以找到更多關於parsing strings in PHP manual。