dqwyghl0649 2015-03-10 00:55 采纳率: 0%
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我可以在PHP中有2个标头位置吗?

So, I know my code was working and I have tried un-doing all steps to see where the bug is, but I am still keep getting an error

my php id=0.

Can you guys show me how I can fix my code up?

The error is as follows:

undefined variable list_id. It works on my localmachine but not when uploaded to server.

Thanks.

The following is my code:

if(!empty($_GET['id'])){
  $list_id = intval(($_GET['id']));
  try {
        $sql = 'SELECT * FROM items where id =' . $list_id;
        $query = $pdo->prepare($sql);
        $query->execute();
  } catch(Exception $e) {
        echo $e->getMessage();
        die();
  }
  $list = $query->fetch(PDO::FETCH_ASSOC);
  if ($list == FALSE) {

    header("location: index.php");
  } 


}

if ($list_id == 0) {
    header("location: index.php");
}
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3条回答 默认 最新

  • dsqa6272 2015-03-10 01:14
    关注

    Seems there are a few issues here. I have added the comments inline.

    if(!empty($_GET['id'])){
        $list_id = intval($_GET['id']); //was double parenthesis here
        try {
                $sql = 'SELECT * FROM items where id =' . $list_id;
                $query = $pdo->prepare($sql);
                $query->execute();
            } catch(Exception $e) {
                echo $e->getMessage();
                die();
            }
        $list = $query->fetch(PDO::FETCH_ASSOC);
        $count = count($list); //count result and use for comparison instead of false
        if ($count === 0) {
            header("location: index.php");
            exit;
        } 
    
    } else {
        header("location: index.php"); //if no $_GET, redirect
        exit;
    }
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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