PHP | Ds\Set clear() Function
Last Updated :
22 Aug, 2019
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The Ds\Set::clear() function is an inbuilt function in PHP which is used to remove all values from the set.
Syntax:
php
php
void public Ds\Set::clear( void )Parameters: This function does not accept any parameter. Return value: This function does not return any value. Below programs illustrate the Ds\Set::clear() function in PHP: Program 1:
<?php
// Declare new Set
$set = new \Ds\Set([1, 2, 3, 4, 5, 6]);
// Display the Set element
print_r($set);
// Use clear() function to remove elements
$set->clear();
// Display the Set element
print_r($set);
?>
<?php // Declare new Set$set = new \Ds\Set([1, 2, 3, 4, 5, 6]); // Display the Set element print_r($set); // Use clear() function to remove elements $set->clear(); // Display the Set element print_r($set); ?>
Output:
Program 2:
Ds\Set Object
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
[5] => 6
)
Ds\Set Object
(
)
<?php
// Declare new Set
$set = new \Ds\Set([10, 15, 21, 13, 16, 18]);
// Display the Set element
var_dump($set);
// Use clear() function to remove elements
$set->clear();
// Display the Set element
var_dump($set);
?>
<?php // Declare new Set$set = new \Ds\Set([10, 15, 21, 13, 16, 18]); // Display the Set element var_dump($set); // Use clear() function to remove elements $set->clear(); // Display the Set element var_dump($set); ?>
Output:
Reference: http://php.net/manual/en/ds-set.clear.php
object(Ds\Set)#1 (6) {
[0]=>
int(10)
[1]=>
int(15)
[2]=>
int(21)
[3]=>
int(13)
[4]=>
int(16)
[5]=>
int(18)
}
object(Ds\Set)#1 (0) {
}
