[Solved] Identify the error in this PHP code snippet:<?php setcookie('theme', 'dark'); session_start(); $_SESSION['theme'] = 'light'; ?> | PHP

PHP - Sessions and Cookies

Identify the error in this PHP code snippet:

<?php
setcookie('theme', 'dark');
session_start();
$_SESSION['theme'] = 'light';
?>

Asession_start() must be called before setcookie()

BNo error, code is correct

C$_SESSION cannot be set after setcookie()

Dsetcookie() must be called before any output

Step-by-Step Solution

Solution:

Step 1: Recall header rules in PHP
Both setcookie() and session_start() send HTTP headers and must be called before any output.
Step 2: Check order and output
No output before either function. Order of setcookie() before session_start() is fine; multiple Set-Cookie headers are allowed.
Final Answer:
No error, code is correct -> Option B
Quick Check:
Headers before output, order OK [OK]

Quick Trick: Call setcookie() and session_start() before any output [OK]

Common Mistakes:

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