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What is PHP and what is it commonly used for in web development?

• PHP is a client-side scripting language commonly used for styling web pages.

• PHP is a programming language used for building mobile applications.

• PHP is a server-side scripting language used for web development.

• PHP is a markup language used for creating website layouts.

What is the file extension commonly used for PHP files?

• The file extension commonly used for PHP files is ".html".

• The file extension commonly used for PHP files is ".css".

• The file extension commonly used for PHP files is ".php".

• The file extension commonly used for PHP files is ".js".

What is contained in PHP file?

• HTML tags and PHP scripting code

• Python code and for styling web pages

• Server configuration settings

• Plain text content and for displaying images on a web page

Answer explanation

A PHP file contains PHP code, which is a combination of HTML, CSS, JavaScript, and PHP scripting language elements. It can include variable declarations, functions, loops, conditional statements, database interactions, and other server-side logic.

How do you declare and use variables in PHP?

• Variables in PHP are declared using the dollar sign ($) followed by the variable name.

• Variables in PHP are declared using the "var" keyword followed by the variable name.

• Variables in PHP are declared using the at symbol (@) followed by the variable name.

• PHP does not require variable declaration; variables can be used directly without declaration.

What is the concatenation operator in PHP, and how is it used?

• The concatenation operator in PHP is the plus (+) symbol, used to concatenate or join strings together.

• The concatenation operator in PHP is the dot (.) symbol, used to concatenate or join strings together.

• PHP does not have a specific concatenation operator; string concatenation is done implicitly.

• The concatenation operator in PHP is the ampersand (&) symbol, used to concatenate or join strings together.

How do you create a hyperlink in HTML?

• Hyperlinks in HTML are created using the <link> tag.

• Hyperlinks in HTML are created using the <a> tag. It is structured with the opening <a> tag, the href attribute to specify the URL, and the link text, followed by the closing </a> tag.

• Hyperlinks in HTML are created using the <hyperlink> tag.

• HTML does not support creating hyperlinks.

What are the different types of comments in PHP?

• In PHP, comments are denoted by a single forward slash (/) for both single-line and multi-line comments.

• In PHP, comments are denoted by the hash symbol (#) for both single-line and multi-line comments.

• In PHP, comments can be written using either double forward slashes (//) for single-line comments or enclosed within /* */ for multi-line comments.

• PHP does not support comments; all code is treated as executable.

What is the purpose of an if statement in PHP?

• An if statement in PHP is used to execute a block of code only once, regardless of the condition's truth value.

• An if statement in PHP is used to execute a block of code based on a counter, with a specified number of iterations.

• PHP does not support if statements; conditional logic is achieved through other means.

• An if statement in PHP is used to execute a block of code if a certain condition is true.

What are the different types of loops in PHP?

• "if", "else", and "switch

• "start", "continue", and "stop"

• "insert", "update", and "delete"

• while", "do...while", "for", and "foreach"

Answer explanation

• while – loops through a block of code as long as the specified condition is true.​

• do…while – loops through a block of code once, and then repeats the loop as long as the specified condition is true.​

• for – loops through a block of code a specified number of times.​

• foreach – loops through a block of code for each element in an array.​

How do you define a function in PHP?

• A function in PHP is defined using the "define" keyword followed by the function name and a code block.

• A function in PHP is defined using the "func" keyword followed by the function name and a code block.

• A function in PHP is defined using the "create" keyword followed by the function name and a code block.

• A function in PHP is defined using the "function" keyword followed by the function name and a code block.

Answer explanation

• All functions start with the keyword “function”.​ Each function has a name– It should be possible to understand what the function does by its name. The name can start with a letter or underscore, but not with a number.​ Add an opening curly brace, “{“, to indicate the start of the function.​ Insert the function code. Add a closing curly brace, “}”, to indicate the end of the function.​