PHP QUESTIONS AND ANSWERS
What does php stand for? - Answers -PHP stands for PHP: Hypertext Preprocessor
is PHP server side or client side scripting language? - Answers -server side
how are php files returned to the browser? - Answers -PHP files are returned to the
browser as plain HTML
how is a php started and ended? - Answers -A PHP scripting block always starts with
<?php and ends with ?>
where can a php script be placed in the document? - Answers -anywhere
how must each php code line end? - Answers -with a semi colon
what is the purpose of the semi colon? - Answers -it is a separator and used to
distinguish one set of instructions from another
what are two basic statements to output text with PHP? - Answers -echo and print
what happens if the php file has an html extension instead of PHP? - Answers -the php
code will not be executed
how is a single line comment made in php? - Answers -With //
how is a comment block made? - Answers -/* */
What are variables used for? - Answers -Variables are used for storing values, such as
numbers, strings or function results, so that they can be used many times in a script.
what do all variables start with? - Answers -All variables in PHP start with a $ sign
symbol.
The correct way of setting a variable in PHP: - Answers -$var_name = value;
is PHP strongly or loosely typed? - Answers -loosely
in php does a variable need to be declared (created) before being set? - Answers -no,
php automatically creates the variable and sets it to the correct type.
What is meant by the term strongly typed? - Answers -variables have to be defined
before they can be used
, in php how must a variable name start? - Answers -A variable name must start with a
letter or an underscore _
What kinds of characters can a variable name contain? - Answers -A variable name
can only contain alpha-numeric characters and underscores (a-z, A-Z, 0-9, and _ )
should a variable name contain spaces? - Answers -no
if a variable name is more than one word how should it be formatted? - Answers -with
an underscore between words or with the second word capitalized
What is a string variable used for? - Answers -A string variable is used to store and
manipulate a piece of text.
What is the only string operator in php? - Answers -The concatenation operator (.)
What is the concatenation operator used for? - Answers -to put two string values
together.
what are operators used for? - Answers -Operators are used to operate on values.
What kinds of different operators exist? - Answers -arithmetic, assignment, comparison,
and logical
when should the if else statement be used? - Answers -if you want to execute a set of
code when a condition is true and another if the condition is not true
when should the else if statement be used? - Answers -is used with the if...else
statement to execute a set of code if one of several condition are true
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 - Answers -...
What is the switch statement used for in PHP? - Answers -to perform one of several
different actions based on one of several different conditions.
If you want to select one of many blocks of code to be executed which statement should
be used? - Answers -switch
What is the primary advantage of using the switch statement? - Answers -It avoids
avoid long blocks of if..elseif..else code.
What is an Array? - Answers -An array can store one or more values in a single
variable name.
What does php stand for? - Answers -PHP stands for PHP: Hypertext Preprocessor
is PHP server side or client side scripting language? - Answers -server side
how are php files returned to the browser? - Answers -PHP files are returned to the
browser as plain HTML
how is a php started and ended? - Answers -A PHP scripting block always starts with
<?php and ends with ?>
where can a php script be placed in the document? - Answers -anywhere
how must each php code line end? - Answers -with a semi colon
what is the purpose of the semi colon? - Answers -it is a separator and used to
distinguish one set of instructions from another
what are two basic statements to output text with PHP? - Answers -echo and print
what happens if the php file has an html extension instead of PHP? - Answers -the php
code will not be executed
how is a single line comment made in php? - Answers -With //
how is a comment block made? - Answers -/* */
What are variables used for? - Answers -Variables are used for storing values, such as
numbers, strings or function results, so that they can be used many times in a script.
what do all variables start with? - Answers -All variables in PHP start with a $ sign
symbol.
The correct way of setting a variable in PHP: - Answers -$var_name = value;
is PHP strongly or loosely typed? - Answers -loosely
in php does a variable need to be declared (created) before being set? - Answers -no,
php automatically creates the variable and sets it to the correct type.
What is meant by the term strongly typed? - Answers -variables have to be defined
before they can be used
, in php how must a variable name start? - Answers -A variable name must start with a
letter or an underscore _
What kinds of characters can a variable name contain? - Answers -A variable name
can only contain alpha-numeric characters and underscores (a-z, A-Z, 0-9, and _ )
should a variable name contain spaces? - Answers -no
if a variable name is more than one word how should it be formatted? - Answers -with
an underscore between words or with the second word capitalized
What is a string variable used for? - Answers -A string variable is used to store and
manipulate a piece of text.
What is the only string operator in php? - Answers -The concatenation operator (.)
What is the concatenation operator used for? - Answers -to put two string values
together.
what are operators used for? - Answers -Operators are used to operate on values.
What kinds of different operators exist? - Answers -arithmetic, assignment, comparison,
and logical
when should the if else statement be used? - Answers -if you want to execute a set of
code when a condition is true and another if the condition is not true
when should the else if statement be used? - Answers -is used with the if...else
statement to execute a set of code if one of several condition are true
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 - Answers -...
What is the switch statement used for in PHP? - Answers -to perform one of several
different actions based on one of several different conditions.
If you want to select one of many blocks of code to be executed which statement should
be used? - Answers -switch
What is the primary advantage of using the switch statement? - Answers -It avoids
avoid long blocks of if..elseif..else code.
What is an Array? - Answers -An array can store one or more values in a single
variable name.
