You want to store a user's preferred language in a session and display it on every page. Which code snippet correctly does this?

hard📝 Application Q8 of 15

PHP - Sessions and Cookies

Aif (!isset($_SESSION['lang'])) { $_SESSION['lang'] = 'English'; } echo $_SESSION['lang'];

Bsession_start(); $_SESSION['lang'] = 'English'; echo $_SESSION['lang'];

Csession_start(); if (!isset($_SESSION['lang'])) { $_SESSION['lang'] = 'English'; } echo $_SESSION['lang'];

Dsession_start(); $_SESSION['lang'] == 'English'; echo $_SESSION['lang'];

Step-by-Step Solution

Solution:

Step 1: Ensure session is started
Calling session_start() is necessary before using $_SESSION.
Step 2: Set language only if not set
Using isset() avoids overwriting existing language preference.
Step 3: Output the stored language
Echoing $_SESSION['lang'] displays the preferred language.
Final Answer:
Code snippet that starts session, sets lang if unset, then echoes it -> Option C
Quick Check:
Start session + check + set + echo = session_start(); if (!isset($_SESSION['lang'])) { $_SESSION['lang'] = 'English'; } echo $_SESSION['lang']; [OK]

Quick Trick: Check if session key exists before setting to avoid overwrite [OK]

Common Mistakes:

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