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Weird PHP error message

I am getting an error in php_error_log that says:

PHP Notice:  Undefined variable: _SESSION in C:\xampp\htdocs\newdimension\public\login.php on line 3

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I have a login.php, and at the very top is:

<?php
$pageTitle = "Login";
$errorMessage = $_SESSION['error'];

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PHP thinks I am spelling $_SESSION as _SESSION, what the hell??!

I've looked this over and over and can't figure out why PHP would think this. Can anyone please explain this to me??

SOLUTION

Loganathan Natarajan

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elepil

ASKER

Loganathan,

Okay, I can see that error I made. But even then, shouldn't the result of my error be a null $errorMessage? Why would PHP flag it as an undefined variable?

Loganathan Natarajan

Always check to make sure the variable is set first before using it:

if(isset($_SESSION['error'])){
    $errorMessage = $_SESSION['error'];
}

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elepil

ASKER

My original question was why PHP was somehow interpreting my $_SESSION as _SESSION. Your answer doesn't seem to be addressing that.

SOLUTION

Marco Gasi

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elepil

ASKER

Marco,

But what causes this to happen? I want to know so I don't repeat this. This kind of error message is really annoying.

ASKER CERTIFIED SOLUTION

Dave Baldwin

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elepil

ASKER

Thanks for the help!