The Ds\Set::clear() function is an inbuilt function in PHP which is used to remove all values from the set.
Syntax:
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); ?> |
Output:
Ds\Set Object
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
[5] => 6
)
Ds\Set Object
(
)
Program 2:
<?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:
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) {
}
Reference: http://php.net/manual/en/ds-set.clear.php
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