Topics Summer Course

What does PHP standfor

PHP: Hypertext Preprocessor

Where is PHP code executed

On the server

What does the browser receive after PHP executes?

Plain HTML

What file extension do PHP files use

.php

What tags begin and end a PHP script

<?php and ?>

How does every PHP statement end

With a semicolon (;)

Are PHP variable names case-sensitive

Yes

Are PHP keywords case-sensitive?

No

What are the two main output statements in PHP?

echo and print

Which is slightly faster: echo or print?

echo

Which statement has no return value?

echo

Which statement returns 1?

print

How do PHP variables begin?

With the $ symbol

Does PHP require variable declarations?

No

When is a variable created in PHP?

When it is first assigned a value.

Can a PHP variable begin with a number?

No

Is PHP loosely typed or strongly typed?

Loosely typed.

Which function displays a variable's type and value?

var_dump()

Name the basic PHP data types

String, Integer, Float, Boolean, Array, Object, NULL, Resource

What are the three variable scopes in PHP?

Local, Global, Static

Where can a local variable be accessed

Only inside the function where it is declared

Where can a global variable normally be accessed

Outside functions

Which keyword allows access to global variables inside a function?

global

What does the static keyword do?

Keeps a local variable's value between function calls.

What are PHP superglobals?

Predefined variables accessible from anywhere

Name five PHP superglobals

• $GLOBALS

• $_POST

• $_GET

• $_SESSION

• $_SERVER

What is $GLOBALS

An array containing all global variables

How do you create a constant

Using define() or const

Do constants use the $ symbol

No

What conditional statements does PHP support?

• if

• if...else

• if...elseif...else

• switch

What loops does PHP support?

• while

• do...while

• for

• foreach

Which keyword defines a class?

class

What are the two modern ways PHP connects to MySQL?

MySQLi and PDO

Which connection method only works with MySQL

MySQL

What is the difference between echo and print?

echo is slightly faster, has no return value, and can output multiple parameters. print returns 1 and only accepts one argument