Lecture 6 - ServerSideScripting I

Question 1

What does PHP stand for?

Answer 1

PHP: HyperText Preprocessor

Question 2

The web server does what three things with php?

Answer 2

Interprets, processes and renders

Question 3

What interprets, processes and renders php?

Answer 3

a web server

Question 4

What language can handle complex data processing that allows for dynamic content?

Answer 4

php

Question 5

Can PHP handle both new and permanently stored data?

Answer 5

Yes!

Question 6

What does LAMP stand for?

Answer 6

Linux, Apache, MySQL, PHP

Question 7

can the closing tag… ?>… be omitted on occasions?

Answer 7

Yes. Sometimes it is purposefully omitted.

Question 8

What is the difference between echo and print?

Answer 8

They are mostly the same aside from the fact that echo has no return value and print returns a value of 1. Echo can take multiple parameters, but print can only take one.

Question 9

What are three ways to comment in PHP?

Answer 9

//this is a comment
/*This is a comment*/
#This is a comment

Question 10

What does a php script consist of?

Answer 10

a series of commands and statements

Question 11

What is each statement terminated with

Answer 11

A semicolon (;)

Question 12

What do php statements do?

Answer 12

Call for functions and provide parameters

Question 13

Can a function have more than one parameter?

Answer 13

yes! Each parameter is separated by a comma.

Question 14

Name two built-in php functions

Answer 14

The include function and the require function

Question 15

What is the difference between failure of an include file and a required file?

Answer 15

Include: In case of failure, a warning will be generated.

Require: In case of failure, the execution of the script will be terminated.

Question 16

Php scripts are executed on the server, but can we see php code when we “View Source” in our browser?

Answer 16

No! Only html is visible

Question 17

Use PHP to echo a date

Answer 17

echo date(‘I, F ds Y.’);

Question 18

Is PHP a loosely typed language?

Answer 18

Yes! Good job!

Question 19

What can we do to variables in php?

Answer 19

They can be altered, printed to the browser, saved to a database, emailed, etc.

Question 20

What are variable names always preceded with?

Answer 20

$

Question 21

Is this var name okay or illegal?

$3fifteen

Answer 21

No, the first char after $ must be a letter or underscore

Question 22

How do you concatenate in php?

Answer 22

with a period: $example = ‘Hi’ . ‘there’;

Question 23

What is variable interpolation?

Answer 23

The process of converting a variable name into their actual value. Use “” instead of ‘’.

”” prints value
‘’ prints var name

Question 24

What does an array look like in PHP?

Answer 24

$myArray = array(‘item1’=>’my value’, ‘item 2’=>’another value’);

Question 25

What is an indexed array?

Answer 25

These use numbers as indices to point to the values they contain.

Question 26

What is an associative array?

Answer 26

The array’s values are associated with meaningful indices

Question 27

How do you print the contents of an array in php?

Answer 27

print_r()

Question 28

What is $_REQUEST used for?

Answer 28

Used when requesting a variable regardless of it being sent as part of the
query string (i.e., $_GET) or a form post (i.e., $_POST)

Question 29

What are objects used for?

Answer 29

Storing instances of classes

Question 30

When is a Task Flow useful?

Answer 30

When dealing with forms, it is recommended to use one.