[Solved] Identify the error in this PHP code snippet:<?php echo $_SESSION['user']; ?>Assuming session_start() was not called earlier. | PHP

PHP - Superglobals and Web Context

Identify the error in this PHP code snippet:

<?php
echo $_SESSION['user'];
?>

Assuming session_start() was not called earlier.

AUndefined index 'user' error

BSession not started error or warning

CNo error, code works fine

DSyntax error due to missing semicolon

Step-by-Step Solution

Solution:

Step 1: Understand $_SESSION behavior
$_SESSION is always available as an empty array if no session data is loaded; session_start() initializes session handling but does not set keys.
Step 2: Identify the specific error
Since 'user' key is not set, accessing $_SESSION['user'] produces a "Notice: Undefined index: user" (undefined index error).
Final Answer:
Undefined index 'user' error -> Option A
Quick Check:
Accessing unset $_SESSION['user'] = undefined index [OK]

Quick Trick: Always call session_start() before using $_SESSION [OK]

Common Mistakes:

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