Joomla simple to determine whether the user login method _php instance

The examples in this paper describe the method that Joomla simply determines whether a user is logged in. Share to everyone for your reference, as follows:

<?phpif (isset ($_session[' auth ' ["username"]) {echo "Welcome"). $_session[' auth ' ["username"]. "!"; }else{echo "Log in";}? >

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It is hoped that this article is helpful to everyone based on Joomla program design.

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