Php 未定义索引';邀请';注册页面出错
我只是在进入注册页面时出现此错误Php 未定义索引';邀请';注册页面出错,php,joomla,joomla2.5,Php,Joomla,Joomla2.5,我只是在进入注册页面时出现此错误 Undefined index: invite 但是当我进入同一页时 url?invite=2000 this error is not shown... 下面代码的第二行显示了错误 $mySess = JFactory::getSession(); $_SESSION['fromid'] = $_GET['invite']; $fromid = $_SESSION['fromid']; 如果“invite”未在url
Undefined index: invite
但是当我进入同一页时
url?invite=2000 this error is not shown...
下面代码的第二行显示了错误
$mySess = JFactory::getSession();
$_SESSION['fromid'] = $_GET['invite'];
$fromid = $_SESSION['fromid'];
如果“invite”未在url中使用,我如何初始化它…使用
isset
函数,如下所示:
$mySess = JFactory::getSession();
$_SESSION['fromid'] = isset($_GET['invite']) ? $_GET['invite'] : '';
$fromid = $_SESSION['fromid'];
使用
isset
功能,如下所示:
$mySess = JFactory::getSession();
$_SESSION['fromid'] = isset($_GET['invite']) ? $_GET['invite'] : '';
$fromid = $_SESSION['fromid'];
这基本上是Matt的解决方案,但没有复杂的
if-then-else
-速记
$mySess = JFactory::getSession();
// this value will be used if you did not pass the parameter invite to your script
$inviteDefaultValue = -1;
// isset checks if the variable exists.
// you can also use array_key_exists("invite", $_GET)
if (isset($_GET['invite']))
{
// $_GET['invite'] is set, so we can use it
$_SESSION['fromid'] = $_GET['invite']);
}
else
{
// $_GET['invite'] is not set, so use your default value here
$_SESSION['fromid'] = $inviteDefaultValue;
}
$fromid = $_SESSION['fromid'];
这基本上是Matt的解决方案,但没有复杂的
if-then-else
-速记
$mySess = JFactory::getSession();
// this value will be used if you did not pass the parameter invite to your script
$inviteDefaultValue = -1;
// isset checks if the variable exists.
// you can also use array_key_exists("invite", $_GET)
if (isset($_GET['invite']))
{
// $_GET['invite'] is set, so we can use it
$_SESSION['fromid'] = $_GET['invite']);
}
else
{
// $_GET['invite'] is not set, so use your default value here
$_SESSION['fromid'] = $inviteDefaultValue;
}
$fromid = $_SESSION['fromid'];
也许简洁,但我不会说复杂。:)尽管如此,对可能的解决方案还是有很好的补充。我只是想,不知道
isset
的用户也不会知道条件的速记。肯定不会受伤的!:-也许是凤蝶,但我不会说复杂。:)尽管如此,对可能的解决方案还是有很好的补充。我只是想,不知道isset
的用户也不会知道条件的速记。肯定不会受伤的!:-P