PHP

Question 1

What is PHP? What are some of the rules?

Answer 1

Server-side technology used to create web application back-ends. Used to build dynamic web pages - working closely with HTML. Every statement in PHP must be terminated with a semicolon. Whitespace is generally ignored when executing PHP code. Keywords are not case sensitive in PHP. As a convention, use the standard casing.

Question 2

What is a dynamic web page?

Answer 2

A web page where each visitor to the site gets a customized page that can look different than how the site looks to another visitor. In contrast a static web page will provide the same content to each visitor

Question 3

How do you write comments in PHP?

Answer 3

Either # or // can be used to create a single line comment. Use /* to create a multiline comment */

Question 4

How do you embed PHP in HTML?

Answer 4

Place PHP code between tags. If you’re in a .php file, just the opening tag - is implied and left out by convention.

Question 5

What does string concatenation mean? How do you concatenate strings?

Answer 5

Combining two or more strings together. The concatenation operator is a period.

EX: echo “one” . “two”; // Prints: onetwo

Question 6

How do you declare a variable in PHP?

Answer 6

use the dollar sign ($ aka sigil) character before the variable name and assign a value using the assignment operator (=). Variables can contain letters, numbers, and underscore but must start with a letter or underscore. Variable names are case sensitive. We reassign a variable using the assignment operator on a variable that’s already been declared.

EX: $my_name = “Rachel Beacham”;