Week 4

What are operators in PHP?

!=, ===, ___

All variables in PHP start with what symbol?

$

$stuff = array('course ' => 'PHP-Intro', 'topic' => 'Arrays'); echo ________;

$stuff['topic']

What is a correct way to add a comment in PHP?

/* ... */

What is the value of $x? $x = 1200 + "34";

1234

What is the value returned by: (int) 9.9 -1

8

PHP Server scripts are surrounded by?

<?php ... ?>

Use what operator to test if two values are identical in both value and type?

===

What symbol is used to associate a key to a value in an associative array?

=>

In PHP, you cannot make an array of associative arrays.

False

PHP and HTML cannot be intermingled in the same file.

False

What value will var_dump show that echo will not show?

False

You cannot run PHP files from the command line.

False

What does PHP stand for?

PHP: Hypertext Preprocessor

The PHP syntax is most similar to:

Perl and C

$stuff = array('course' => 'PHP-Intro', 'topic' => 'Arrays'); echo isset($stuff['section']);

There is no output.

In PHP you can use both single quotes (' ') and double quotes (" ") for strings.

True

In PHP, arrays can either be key/ value (an associative array) or indexed by integers (a linear array).

True

In PHP, functions names are not case sensitive.

True

In PHP, variable names are case sensitive.

True

You can run PHP files on the server.

True

var_dump will display the name, key/value pairs, and data types of a variable.

True

Which escape sequences can be used in single quoted ( ' ) strings in PHP?

\\, \n, \', \r

What function is used to sort the values in array and keep the keys intact?

asort( )

What function can be used to split a string into an array words based on a delimiter. For instance, create a three element array from the string 'I am great!!!'.

explode( )

What function is used to sort the array in alphabetical order of the keys?

ksort( )

What function is used to rearrange an array in random order?

shuffle( )

What are three built-in sorting functions provided by PHP?

sort( ), asort( ), ksort( )

$x = 12; $y = 12 + $x++; echo "y = $y x =$x";

y = 24 and x = 13