注意问题:未定义的索引

时间:2011-06-08 21:06:20

标签: php html postgresql

我遇到以下代码片段的问题:

<div class= "main2" id ="main">
<fieldset id ='fs3'>
<form action ="<?=$_SERVER['PHP_SELF']?>" method="post">
<?php

$query = pg_query($connect, "Select name FROM types") or die("");
$numrows = pg_num_rows($query);
if ($numrows > 0) {

    echo "<br /><legend><center>Some Text:</center></legend><br />";
    echo "<center>Some Text: <select name='querySelect'>";


        while($r = pg_fetch_assoc($query)) {
            echo "<option value = ".$r['name'].">".$r['name']."</option>";
                }
    echo "</select>\t";
    echo "<input type='submit' value='submit' name='submit'>";
    echo "<br />"; 
    echo "<br />"; 
    if (isset($_POST['submit'])) { 

    $querySelect = $_GET['querySelect'];
switch($querySelect)
{
    case 'A':
        $query = pg_query($connect, "Select model FROM urzadzenia WHERE tid=1") or die("");
        break;
    case 'B':
        $query = pg_query($connect, "Select model FROM urzadzenia WHERE tid=2") or die("");
        break;
    case 'C':
        $query = pg_query($connect, "Select model FROM urzadzenia WHERE tid=3") or die("");
        break;
    case 'D':
        $query = pg_query($connect, "Select model FROM urzadzenia WHERE tid=4") or die("Zapytanie nie działa");
        break;
    case 'E':
        $query = pg_query($polacz, "Select model FROM urzadzenia WHERE tid=5") or die("");
        break;  
}
}   
else
    echo "error";

}



echo "</form>";
echo "</fieldset>"
?>

调用此代码后,将收到以下错误消息:“注意:未定义的索引:QUERYSELECT”

请帮帮我。

2 个答案:

答案 0 :(得分:3)

您正在以POST发送数据,但尝试从GET中获取数据。

$querySelect = $_GET['querySelect'];

应该是

$querySelect = $_POST['querySelect'];

更好,

$querySelect = !empty($_POST['querySelect']) ? $_POST['querySelect'] : null;

答案 1 :(得分:0)

在以下行中通过POST替换GET:

$querySelect = $_GET['querySelect'];