PHP Ds\Set isEmpty() Function
Last Updated :
16 Aug, 2019
The Ds\Set::isEmpty() function of Ds\Set class in PHP is an inbuilt function which is used to check whether a set is empty or not. If the Set instance is empty then this function returns true otherwise it returns False.
Syntax:
bool public Ds\Set::isEmpty ( void )
Parameters: This function does not accepts any parameters.
Return Value: This function returns a boolean value depending on whether the Set is empty or not. If the Set instance is empty then this function returns true otherwise it returns False.
Below programs illustrate the Ds\Set::isEmpty() function:
Program 1:
<?php
$set = new \Ds\Set();
var_dump( $set );
if ( $set ->isEmpty())
echo "Set is Empty" ;
?>
|
Output:
object(Ds\Set)#1 (0) {
}
Set is Empty
Program 2:
<?php
$set = new \Ds\Set([ "Geeks" , "for" , "Keegs" ]);
var_dump( $set );
if ( $set ->isEmpty()==0)
echo "Set is Not Empty" ;
?>
|
Output:
object(Ds\Set)#1 (3) {
[0]=>
string(5) "Geeks"
[1]=>
string(3) "for"
[2]=>
string(5) "Keegs"
}
Set is Not Empty
Reference: http://php.net/manual/en/ds-set.isempty.php
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