PHP数据库PDO连接
嘿,伙计们,我对php中的PDO有点小麻烦,因为它返回的错误是一个未定义的索引。函数和查询返回结果的代码如下:PHP数据库PDO连接,php,database,pdo,Php,Database,Pdo,嘿,伙计们,我对php中的PDO有点小麻烦,因为它返回的错误是一个未定义的索引。函数和查询返回结果的代码如下: function getUserDetails($user) { $db = connect(); try { $stmt = $db->prepare('SELECT name,addr AS address,team FROM TreasureHunt.Player LEFT OUTER JOIN TreasureHunt.MemberOf ON (name=p
function getUserDetails($user) {
$db = connect();
try {
$stmt = $db->prepare('SELECT name,addr AS address,team
FROM TreasureHunt.Player LEFT OUTER JOIN TreasureHunt.MemberOf ON (name=player)
LEFT OUTER JOIN TreasureHunt.PlayerStats USING (player)
WHERE name=:user');
$stmt->bindValue(':user', $user, PDO::PARAM_STR);
$stmt->execute();
$results = $stmt->fetchAll();
$stmt->closeCursor();
} catch (PDOException $e) {
print "Error : " . $e->getMessage();
die();
}
return $results;
}
但是,当运行索引页的代码时,我得到一个错误,上面写着Notice:Undefined index:name
索引的代码如下所示:
try {
$details = getUserDetails($_SESSION['player']);
echo '<h2>Name</h2> ',$details['name'];
echo '<h2>Address</h2>',$details['address'];
echo '<h2>Current team</h2>',$details['team'];
echo '<h2>Hunts played</h2> ',$details['nhunts'];
echo '<h2>Badges</h2>';
foreach($details['badges'] as $badge) {
echo '<span class="badge" title="',$badge['desc'],'">',$badge['name'],'</span><br />';
}
} catch (Exception $e) {
echo 'Cannot get user details';
}
试试看{
$details=getUserDetails($_会话['player']);
回显'Name',$details['Name'];
echo'Address',$details['Address'];
echo“当前团队”,$details[“团队];
echo'Hunts played',$details['nhunts'];
回声“徽章”;
foreach($details['badges']作为$badge){
回显“”,$badge['name'],“
”;
}
}捕获(例外$e){
echo“无法获取用户详细信息”;
}
我的问题是,它为什么会抛出通知?我该如何解决这个问题?
fetchAll
返回多维数组中的所有结果(可能是多行):
这就是为什么数组没有直接索引'name'
,它必须是[0]['name']
或者你不应该
fetchAll
,只要fetch
什么是$db=connect()代码>做什么?如何与db连接?错误的内容是什么?你把太少的细节用var\u dump($details)检查你得到了什么代码>。注意:在带有
(dot)&非由的echo语句concat中,可能会抛出通知,因为没有正确的结果,并且在循环中您使用的$details['badges]
等可能未分配。正如@Rikesh建议使用var_dump或print_r($details)并显示结果一样。@Rikesh,在echo
语句中更好,它使您将多个参数传递给echo
,这些参数按顺序被回送出来。这比串接字符串然后回显它们更有效。@deceze-我从来不知道这一点。谢谢:)
array(
0 => array(/* first row */),
1 => array(/* second row */),
...
)