php - get curent class in sidebar ($_GET['do'] == "")

Answer

Solution:

<?php echo (isset($_GET['do']) && $_GET['do'] == "add_account") ? "class='current'" : ""; ?>
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Check if it exists and then check which value it holds.

Answer

Solution:

Accessing variables (or array indexes, or object properties) which do not exist (yet) in PHP triggers aNotice (not an error). This is the case when you access$_GET['do'], which does not exist.

In order to fix that, replace:

<?php echo ($_GET['do'] == "") ? "class=\"current\"": "";?>
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With:

<?php echo !isset($_GET['do']) ? "class=\"current\"": "";?>
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The same applies everywhere a variable (or array index, or object property) which might not exist. So when you're checking$_GET['do'] for equality with either"" or"add_account" you need to first check ifisset($_GET['do']).

Which means you also need to edit the second occurrence of$_GET['do'] in your code:

<?php echo ($_GET['do'] == "add_account") ? "class=\"current\"": "";?>
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Becomes:

<?php echo (isset($_GET['do']) AND $_GET['do'] == "add_account") ? "class='current'" : ""; ?>
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Like @Houssni said.