PHP Superglobals and Functions

Question 1

contains information about the
server environment and the current request

Answer 1

$_SERVER

Question 2

contains any data that was sent to the
script through a GET request.

Answer 2

$_GET

Question 3

contains any data that was sent to the
script through a POST request.

Answer 3

$_POST

Question 4

contains any uploaded files that were
sent to the script through a POST request. This superglobal is
used when handling file uploads.

Answer 4

$_FILES

Question 5

superglobal contains any cookies that were
sent to the script by the client browser.

Answer 5

$_COOKIE

Question 6

contains any session variables
that have been set

Answer 6

$_SESSION

Question 7

superglobal contains the contents of $_GET,
$_POST, and $_COOKIE.

Answer 7

$_REQUEST

Question 8

contains any environment variables
that have been set on the server.

Answer 8

$_ENV

Question 9

superglobal contains all global variables
that have been defined in the script. It can be used to
access variables from within a function or other local
scope.

Answer 9

$GLOBALS

Question 10

function is used to find the length of a string.

Answer 10

strlen()

Question 11

function is used to replace a string with
another string.

Answer 11

str_replace()

Question 12

function is used to count the number of
elements in an array.

Answer 12

count()

Question 13

function is used to add one or more
elements to the end of an array.

Answer 13

array_push()

Question 14

function is used to remove the last
element from an array.

Answer 14

array_pop()

Question 15

function is used to format a date and time.
Syntax: date(format, timestamp)

Answer 15

date()

DATE FUNCTION

Question 16

function is used to convert a string into a
Unix timestamp.strtotime()

Answer 16

strtotime()

Date Function

Question 17

function is used to calculate the difference
between two dates.

Answer 17

date_diff()

DATE FUNCTION

Question 18

function is used to return the absolute value of
a number.

Answer 18

abs()

Question 19

function is used to raise a number to a power.

Answer 19

pow()

Question 20

function is used to generate a random number.

Answer 20

rand()

Question 21

function is used to establish a
connection with a MySQL database.
Syntax: mysqli_connect(servername, username,
password, dbname)

Answer 21

mysqli_connect()

Question 22

function is used to execute a SQL query

Answer 22

mysqli_query()

Question 23

function is used to fetch a result
row as an associative array from a MySQL query. The
function takes a result object returned by mysqli_query().

Answer 23

mysqli _ fetch _ assoc()

Question 24

function is used to get the
number of rows in a result set returned by a MySQL
query. The function takes a result object returned by
mysqli_query().

Answer 24

mysqli _ num _ rows()

Question 25

function is used to close a MySQL
database connection.

Answer 25

mysqli_close()

Question 26

is used to check if a variable is set
and not null.

Answer 26

isset()

Question 27

function is used to check if a variable is
empty.

Answer 27

empty()

Question 28

function is used to display the type and
value of a variable.

Answer 28

var_dump()

Question 29

The settype() function is used to set the type of a variable.

Answer 29

settype()

Question 30

function is used to convert a variable to an
integer.

Answer 30

intval()

Question 31

function is used to remove whitespace or other
characters from the beginning and end of a string.

Answer 31

trim()