[Solved] What is wrong with this code snippet?if ($_REQUEST['submit']) { echo 'Form submitted'; } — Ans: It may cause an undefined index notice if 'submit' is not set | PHP

PHP - Superglobals and Web Context

What is wrong with this code snippet?

if ($_REQUEST['submit']) { echo 'Form submitted'; }

AThe echo statement is missing parentheses

BThe syntax for accessing $_REQUEST is incorrect

C$_REQUEST cannot be used in if conditions

DIt may cause an undefined index notice if 'submit' is not set

Step-by-Step Solution

Solution:

Step 1: Check array access safety
Accessing $_REQUEST['submit'] without checking if it exists can cause a PHP notice if 'submit' is not set.
Step 2: Identify correct fix
Use isset($_REQUEST['submit']) to avoid the notice.
Final Answer:
It may cause an undefined index notice if 'submit' is not set -> Option D
Quick Check:
Always check if key exists before accessing $_REQUEST [OK]

Quick Trick: Check isset() before accessing $_REQUEST keys [OK]

Common Mistakes:

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