Mendez: chaps 23-26

Question 1

what is PHP?

Answer 1

hypertext per-processor: was 1st named (PHP) personal home page

Question 2

how does PHP work and with what?

Answer 2

a (CGI) Common Gateway Interface script that works with the server side as its a server language and not with the browser side of things.

Question 3

what is a client side language?

Answer 3

a comp. language that works with the browser on the host computer. if host comp. is slow then webpage loads slow.

Question 4

what is a server side language?

Answer 4

PHP is an example and the language processing occurs on the server side before sending info to the user’s computer. (*code is hidden from users). -reduces workload on users comp.

Question 5

what is java?

Answer 5

class-based language. -objects divided into classes. can’t have properties added dynamically to classes.

Question 6

what is java Script?

Answer 6

object-oriented: properties and methods can be added to objects dynamically.

Question 7

what is progressive enhancement?

Answer 7

when a web pg is built without javaScript then JavaScript is added to enhance and build on the website to make it more appealing.

Question 8

what are the two php tags and why use one over the other?

Answer 8

long hand:

short hand:
?>
*longhand is best as shorthand needs to be turned ‘on’ on each server.

Question 9

what are the 3 PHP error types?

Answer 9

Notices: cpde continues to run- undeclared variables.

• Warnings: doesn’t stop running code, points out error in script.
• Errors: code stops running. causes could be - missing semicolons, function, class definitions, etc.

Question 10

what does the ^ symbol mean in PHP?

Answer 10

^ except. used when telling a function to do something ‘except’ something else.

example: error_notice(E_ALL^E_NOTICE)
* here all errors are shown when script is read except the Notice ones.

Question 11

what does the | mean in PHP?

Answer 11

means ‘or’ used in PHP functions.
ex.
error_notice(E_WARNING | E_ERROR))