[Solved] You want to create a PHP script that processes a form with fields name and age.... Which code snippet correctly implements this using $_POST? | PHP

PHP - Superglobals and Web Context

You want to create a PHP script that processes a form with fields name and age. If age is missing or empty, it should print "Age is required". Which code snippet correctly implements this using $_POST?

Aif ($_POST['age']) { echo 'Age is required'; } else { echo $_POST['name'] . ', ' . $_POST['age']; }

Bif ($_POST['age'] == '') { echo 'Age is required'; } else { echo $_POST['name'] . ', ' . $_POST['age']; }

Cif (isset($_POST['age'])) { echo 'Age is required'; } else { echo $_POST['name'] . ', ' . $_POST['age']; }

Dif (empty($_POST['age'])) { echo 'Age is required'; } else { echo $_POST['name'] . ', ' . $_POST['age']; }

Step-by-Step Solution

Solution:

Step 1: Check for empty or missing age
Using empty() checks if age is missing or empty string, which is correct.
Step 2: Validate other options
if ($_POST['age'] == '') { echo 'Age is required'; } else { echo $_POST['name'] . ', ' . $_POST['age']; } only checks empty string, not missing key; if (isset($_POST['age'])) { echo 'Age is required'; } else { echo $_POST['name'] . ', ' . $_POST['age']; } reverses logic; if ($_POST['age']) { echo 'Age is required'; } else { echo $_POST['name'] . ', ' . $_POST['age']; } treats any value as true incorrectly.
Final Answer:
if (empty($_POST['age'])) { echo 'Age is required'; } else { echo $_POST['name'] . ', ' . $_POST['age']; } -> Option D
Quick Check:
Use empty() to check missing or empty POST fields [OK]

Quick Trick: Use empty() to check if POST field is missing or blank [OK]

Common Mistakes:

Using isset() alone misses empty strings
Incorrect if condition logic
Not handling missing keys properly

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Which code snippet correctly implements this using $_POST?

Step 1: Check for empty or missing age

Step 2: Validate other options

Final Answer:

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