Variable

Question 1

What function is used to get string value of a variable ?

Answer 1

Use strval( $val ) to get string value

Question 2

What function would you use to get integer value of variable?

Answer 2

Use Intval($val ) to get integer value .

Question 3

What function would you use to format a nmber as a currency string

Answer 3

Use money_format ( string $format , float $number )

Question 4

What function can you use to can set locale value ?

Answer 4

Use setlocale() to set to the appropriate default locale before using this function.

The LC_MONETARY category of the locale settings, affects the behavior of this function.

E.g setlocale(LC_MONETARY, ‘en_US’); or
setlocale(LC_MONETARY, ‘it_IT’);
echo money_format(‘%.2n’, $number) . “\n”;

setlocale(LC_MONETARY, 'en_GB');
$fmt = 'The final value is %i (after a 10%% discount)';
echo money_format($fmt, 1234.56) . "\n";
// The final value is  GBP 1,234.56 (after a 10% discount)

Question 5

What function is used to Find whether the type of a variable is float

Answer 5

is_float()

Question 6

What do you use to set a variables type?

Answer 6

settype ( $var , type )

— Set the type of a variable

Question 7

What function is used to serialise a string?

Answer 7

string serialize ( mixed $value )
- Generates a storable representation of a value

Question 8

What is used to dump information on screen?

Answer 8

var_dump()

— Dumps information about a variables

Question 9

How would you exportable a POST value into a global scope?

Answer 9

bool import_request_variables ( string $types [, string $prefix ] )

• Imports GET/POST/Cookie variables into the global scope. It is useful if you disabled register_globals, but would like to see some variables in the global scope.

Question 10

What function would you use to get an multidimensional of defined variables ?

Answer 10

array get_defined_vars ( void )

-This function returns a multidimensional array containing a list of all defined variables, be them environment, server or user-defined variables, within the scope that get_defined_vars() is called.

Question 11

How do you determine if an variable is empty?

Answer 11

bool empty ( mixed $var )

-Determine whether a variable is considered to be empty.

Question 12

What happens when the following code is run?

Answer 12

Output is lastname , email , phone

Implode (string , array) function joins a string with array.

Question 13

What happens when the following code is run?
$input = alien ;
echo str_pad($input, 10, "-=", STR_PAD_LEFT);

Answer 13

output produces
“-=-=-Alien”

str_pad ( , number_of_spaces , , position)
- function adds space to string , depending added parameter it positions it left STR_PAD_LEFT, or right STR_PAD_RIGHT. And can add string

Question 14

What is the function isset() used for?

Answer 14

The function is used to return Boolean if the variable is set and not NULL