[Solved] Identify the error in this PHP code snippet:$username = $_POST['username']; $cleanUser = filter_var($username, FILTER_SANITIZE_EMAIL);... | PHP

PHP - Superglobals and Web Context

Identify the error in this PHP code snippet:

$username = $_POST['username'];
$cleanUser = filter_var($username, FILTER_SANITIZE_EMAIL);
if (filter_var($cleanUser, FILTER_VALIDATE_EMAIL)) {
    echo "Valid user email";
} else {
    echo "Invalid email";
}

ANo error, code is correct

BUsing FILTER_SANITIZE_EMAIL on username which may not be an email

CIncorrect function name filter_var

DMissing semicolon after filter_var call

Step-by-Step Solution

Solution:

Step 1: Analyze input and sanitization
The variable is named username but sanitized as email, which may not be an email format.
Step 2: Understand validation mismatch
Validating sanitized username as email can cause false invalid results if username is not an email.
Final Answer:
Using FILTER_SANITIZE_EMAIL on username which may not be an email -> Option B
Quick Check:
Sanitizing wrong input type causes errors [OK]

Quick Trick: Sanitize and validate matching data types [OK]

Common Mistakes:

Sanitizing username as email
Assuming filter_var name is wrong
Missing semicolons (not in this code)

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More PHP Quizzes

Identify the error in this PHP code snippet:

Step 1: Analyze input and sanitization

Step 2: Understand validation mismatch

Final Answer:

Quick Check:

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