Section 1
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What does the while statement do?
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Mar 1, 2020
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Section 1
(50 cards)
What does the while statement do?
loops through a block of code if and as long as a specified condition is true
how should a function be named?
so that you can understand what it does by it's name
What is the switch statement used for in PHP?
to perform one of several different actions based on one of several different conditions.
should a variable name contain spaces?
no
There are three different kinds of arrays?
Numeric, associative, and multidimensional
What are associative arrays?
In An associative array, each ID key is associated with a value.
in php how must a variable name start?
A variable name must start with a letter or an underscore _
What is the concatenation operator used for?
to put two string values together.
if a variable name is more than one word how should it be formatted?
with an underscore between words or with the second word capitalized
What kinds of different operators exist?
arithmetic, assignment, comparison, and logical
What is meant by the term strongly typed?
variables have to be defined before they can be used
What is a string variable used for?
A string variable is used to store and manipulate a piece of text.
how is a single line comment made in php?
With //
how must each php code line end?
with a semi colon
in php does a variable need to be declared (created) before being set?
no, php automatically creates the variable and sets it to the correct type.
What is the advantage of arrays?
Instead of having many similar variables, you can store the data as elements in an array.
The correct way of setting a variable in PHP:
$var_name = value;
What is the only string operator in php?
The concatenation operator (.)
Where does the real power in PHP come from?
From over 700 functions
What are looping statements used for?
Looping statements in PHP are used to execute the same block of code a specified number of times.
What does the for statement do?
loops through a block of code a specified number of times
What does the foreach statement do?
loops through a block of code for each element in an array
If you want to select one of many blocks of code to be executed which statement should be used?
switch
how is a php started and ended?
A PHP scripting block always starts with <?php and ends with ?>
what happens if the php file has an html extension instead of PHP?
the php code will not be executed
when should the if else statement be used?
if you want to execute a set of code when a condition is true and another if the condition is not true
What is a function?
A function is a block of code that can be executed whenever we need it.
when should the else if statement be used?
is used with the if...else statement to execute a set of code if one of several condition are true
what is a numeric array?
A numeric array stores each element with a numeric ID key.
if more than one line is to be executed as a result of the if else statement then the lines to be executed should be enclosed in curly braces
...
what are two basic statements to output text with PHP?
echo and print
what are operators used for?
Operators are used to operate on values.
what do all variables start with?
All variables in PHP start with a $ sign symbol.
What does the do..while statement do?
loops through a block of code once, and then repeats the loop as long as a special condition is true
is PHP server side or client side scripting language?
server side
where can a php script be placed in the document?
anywhere
What are variables used for?
Variables are used for storing values, such as numbers, strings or function results, so that they can be used many times in a script.
how is a comment block made?
/ /
What kinds of characters can a variable name contain?
A variable name can only contain alpha-numeric characters and underscores (a-z, A-Z, 0-9, and _ )
What is the primary advantage of using the switch statement?
It avoids avoid long blocks of if..elseif..else code.
What are two different ways numeric array id's can be created?
Manually or automatically
What is a multidimensional array?
In a multidimensional array, each element in the main array can also be an array. And each element in the sub-array can be an array, and so on.
What are the looping statements in PHP?
while, do while , for and foreach
how do all funtions in PHP start?
with the word function
how are elements in an array accessed?
Each element in the array has its own ID so that it can be easily accessed.
what is the purpose of the semi colon?
it is a separator and used to distinguish one set of instructions from another
how are php files returned to the browser?
PHP files are returned to the browser as plain HTML
is PHP strongly or loosely typed?
loosely
What is an Array?
An array can store one or more values in a single variable name.
What does php stand for?
PHP stands for PHP: Hypertext Preprocessor
Section 2
(23 cards)