You want to create a PHP script that reads two URL parameters, a and b, adds them as integers, and prints the result. Which code snippet correctly does this?

hard📝 Application Q8 of 15

PHP - Superglobals and Web Context

You want to create a PHP script that reads two URL parameters, a and b, adds them as integers, and prints the result. Which code snippet correctly does this?

A<?php $a = $_GET['a']; $b = $_GET['b']; echo $a . $b; ?>

B<?php $a = $_GET['a']; $b = $_GET['b']; echo $a - $b; ?>

C<?php $a = $_POST['a']; $b = $_POST['b']; echo $a + $b; ?>

D<?php $a = (int)$_GET['a']; $b = (int)$_GET['b']; echo $a + $b; ?>

Step-by-Step Solution

Solution:

Step 1: Convert URL parameters to integers
Use (int) to cast $_GET['a'] and $_GET['b'] to integers to ensure numeric addition.
Step 2: Add and echo the sum
Adding $a and $b after casting prints the correct sum.
Final Answer:
Code casting $_GET params to int and adding -> Option D
Quick Check:
Cast to int before adding URL params [OK]

Quick Trick: Cast $_GET values to int before math operations [OK]

Common Mistakes:

Concatenating strings instead of adding
Using $_POST instead of $_GET
Subtracting instead of adding

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More PHP Quizzes

You want to create a PHP script that reads two URL parameters, a and b, adds them as integers, and prints the result. Which code snippet correctly does this?

Step 1: Convert URL parameters to integers

Step 2: Add and echo the sum

Final Answer:

Quick Check:

Want More Practice?