PHP Ds\PriorityQueue clear() Function
Last Updated :
23 Aug, 2019
The Ds\PriorityQueue::clear() Function in PHP is used to clear all of the elements from a PriorityQueue instance. This function just clears the instance without deleting it.
Syntax:
void public Ds\PriorityQueue::clear ( void )
Parameters: This function does not accepts any parameters.
Return Value: This function does not returns any value.
Below programs illustrate the Ds\PriorityQueue::clear() Function in PHP:
Program 1:
<?php
$pq = new \Ds\PriorityQueue();
$pq ->push( "One" , 1);
$pq ->push( "Two" , 2);
$pq ->push( "Three" , 3);
echo "Initial PriorityQueue: \n" ;
print_r( $pq );
$pq ->clear();
echo "\nPriorityQueue after clearing:\n" ;
print_r( $pq );
?>
|
Output:
Initial PriorityQueue:
Ds\PriorityQueue Object
(
[0] => Three
[1] => Two
[2] => One
)
PriorityQueue after clearing:
Ds\PriorityQueue Object
(
)
Program 2:
<?php
$pq = new \Ds\PriorityQueue();
$pq ->push( "Geeks" , 10);
$pq ->push( "for" , 20);
$pq ->push( "Geeks" , 30);
echo "Initial PriorityQueue: \n" ;
print_r( $pq );
$pq ->clear();
echo "\nPriorityQueue after clearing:\n" ;
print_r( $pq );
?>
|
Output:
Initial PriorityQueue:
Ds\PriorityQueue Object
(
[0] => Geeks
[1] => for
[2] => Geeks
)
PriorityQueue after clearing:
Ds\PriorityQueue Object
(
)
Reference: http://php.net/manual/en/ds-priorityqueue.clear.php
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