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CIS 214 Chapter 4 Homework

Written by Robert Gallegos
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CIS 214 PHP and MySQL

Chapter 4 Homework                                                                                                               Date due: 02/27/2012

Your name: _______________________________________________

 

1.

Validation, which is the process of checking to make sure form _______________ is OK before doing anything with it.

Answer:

2.

Sending the _______________ should completely hinge on the data validation.

Answer:

3.

Languages like _______________ can do clientside validation.

Answer:

4.

PHP_______________ statement lets your code make decisions based on whether or not something is true.

Answer:

5.

The heart of the if statement is its test _______________, which is always interpreted as either true or false.

Answer:

6.

It’s quite common to use a _______________ as a test condition, which typically

involves comparing a variable to some value.

Answer:

7.

Equality comparisons aren’t just for variables and strings. You can compare variables to numbers, variables to variables, and even perform _______________.

Answer:

8.

There are two ways to check if things are not _______________: <> and!=.

Answer:

9.

The_______________ than sign (>) checks to see if the value on the left is greater than the value on the right.

Answer:

10.

The_______________ than sign (<) compares the value on the left to the value on the right.

Answer:

11.

Greater than or equal to (>=) is like greater than (>) except it also results in true if the two values are ______________.

Answer:

12.

Less than or equal to (<=) is _______________ to less than, except it’s also true if the values are equal.

Answer:

13.

Yes, you can compare strings in _______________ test conditions. They work based on the alphabet, with a being considered smaller than (less than) z.

Answer:

14.

Is a test condition the same thing we used to control while loops in Chapter 3?

Answer:

15.

The _______________ function tests to see if a variable exists,

Answer:

16.

Theempty() function takes things one step further and determines whether a variable contains an _______________ value.

Answer:

17.

Isset() doesn’t show you the difference between a blank form field and a filled out one. The _______________ function checks to see if a variable is actually empty, which is what we need for form validation.

Answer:

18.

The _______________ function is extremely valuable when you need to know if a piece of data exists.

Answer:

19.

The _______________ operator (!) turns true into false, or false into true.

Answer:

20.

PHP logic _______________ make it possible to structure more elegant if statements.

Answer:

21.

Logical ­­­­­­­­­­­­­­­_______________ is coded as &&, while logical OR is coded as ||.

Answer:

22.

The AND (&&) and OR (||) logical operators make it possible to structure much more powerful _______________ conditions that would otherwise require additional, often messy, if statements.

Answer:

23.

Does it matter what order you put two conditions joined by && or || in an if statement?

Answer:

24.

The _______________ clause starts right after the closing curly brace for the if statement.

Answer:

25.

Just like the action code in an if, the code in an _______________ is enclosed in curly braces.

Answer:

26.

The else clause _______________ code when an if test condition is false.

Answer:

27.

It's always a good idea to simplify code whenever possible, especially _______________ code that gets too deep.

Answer:

28.

You can close and open blocks of PHP code to output chunks of _______________ code in a PHP script.

Answer:

29.

Use a _______________ variable known as a flag to keep track of whether or not we need to output the form.

Answer:

30.

Setting _______________ to false initially means the form won't get shown unless there is a validation problem that causes its value to change.

Answer:

31.

By making _______________ code dependent on an IF statement, we avoid duplicate code in our script.

Answer:

32.

An HTML form that is part of the PHP script that processes it is known as _______________.

Answer:

33.

Sticky _______________ remember the data the user has already correctly entered.

Answer:

34.

The _______________ attribute of the <form> tag connects a form to the script that processes it.

Answer:

35.

$_SERVER[‘PHP_SELF’] stores away the _______________ of the current script.

Answer:

36.

The $_POST _______________ allows us to check and see if a form has been submitted.

Answer:

37.

For a text area input field, we echo the sticky data in between the <textarea> and </textarea> _______________ instead of using the value attribute.

Answer:

38.

It’s incredibly important for each row in a table to be _______________ identifiable, meaning that you can specifically access one row (and only that row!).

Answer:

39.

We can use it to create a new column without having to drop the table and destroy its data.

Answer:

40.

A _______________ key is a column in your table that makes each row unique.

Answer:

41.

The_______________ loop is a special kind of loop designed specifically for cycling through values stored in an array.

Answer:

42.

The _______________ loop takes an array and loops through each element in the array without the need for a test condition or loop counter.

Answer

 

 

 

 

Total Correct:                        _______________________

Percent:                                  _______________________

Grade:                                    _______________________

 

Last modified on Wednesday, 22 February 2012 22:35