PHP Basics and Forms

What does PHP stand for?

• Private Home Page

• PHP Hypertext Preprocessor

• Personal Hosting Protocol

• Precompiled HTML Processor

Answer explanation

PHP originally stood for "Personal Home Page," but now it is a recursive acronym: "PHP Hypertext Preprocessor." It is a server-side scripting language mainly used for web development

Which symbol is used to start a PHP script?

• <!-- PHP -->

• { PHP }

• <?php ?>

• [PHP]

Answer explanation

Every PHP script must start with <?php and end with ?> to be executed correctly

Which of the following is a valid variable name in PHP?

• $1variable

• $my_variable

• my-variable

• $my variable

Answer explanation

PHP variables must start with a dollar sign ($) and can only contain letters, numbers, and underscores. They cannot start with a number or contain spaces or hyphens

How do you print text in PHP? (Select two correct answers)

• echo "Hello World";

• print("Hello World");

• printf("Hello World");

• display("Hello World");

Answer explanation

Both echo and print can be used to output text in PHP. printf is used for formatted output, while display() does not exist in PHP

Which of the following data types does PHP support?

• String

• Integer

• Boolean

• Array

Answer explanation

PHP supports multiple data types, including Strings, Integers, Booleans, Arrays, Objects, and more

What will be the output of the following PHP code?

$x = 5 + "5";

echo $x;

• 55

• 10

• Error

• 5"5"

Answer explanation

In PHP, when a string containing a number is used in an arithmetic operation, it is automatically converted into an integer. So, "5" is converted to 5, and 5 + 5 = 10

What is the default file extension for PHP scripts?

• .html

• .php

• .js

• .py

Answer explanation

PHP scripts use the .php extension, allowing the server to process them before sending the output to the browser

Which global array is used to collect form data submitted without exposing data in the URL?

• $_REQUEST

• $_FORM

• $_GET

• $_POST

Answer explanation

The $_POST superglobal is used to collect data sent via an HTML form using the method="post". Unlike $_GET, $_POST does not expose data in the URL, making it more secure

What is the correct way to get the value from an input field named “email” using the GET method?

• $_GET['email'];

• get('email');

• $_REQUEST['email'];

• $_POST['email'];

Answer explanation

The $_GET superglobal is used to retrieve data from the URL query string. If the form uses method="get", the value of the "email" field can be accessed with $_GET['email']

What is the purpose of the action attribute in an HTML <form> tag?

• Defines the method of form submission

• Specifies where to send form data

• Prevents form resubmission

• Creates an interactive form

Answer explanation

The action attribute determines the URL to which the form data is sent when the form is submitted. If left empty (action=""), the data is submitted to the same page