我需要一些帮助来理解将变量与字符串混合的正确方法。我已经尝试了所有我能想到的配置,并且不断收到错误。带有散列变量的PHP MYSQL更新
<?php
include('connect.php');
foreach($_GET['item'] as $key=>$value) {
mysql_query("UPDATE userprojectlist SET category_display_order = '$key' WHERE category_id = '$value' ");
}
?>
Notice: Undefined index: item in updatedb.php on line 3
Warning: Invalid argument supplied for foreach() in pdatedb.php on line 3