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PHP Ds / PriorityQueue clear () function

Syntax:
void public DsPriorityQueue::clear (void)
Parameters: this function takes no parameters.Return value:This function does not return any value.The following programs illustrate the Ds / PriorityQueue function: : clear()in PHP:Program 1:  
// Declare a new PriorityQueue $pq = new DsPriorityQueue();  
// Add items to PriorityQueue $pq -> push ( "One" , 1); $pq -> push ( "Two" , 2); $pq -> push ( "Three" , 3); echo " Initial PriorityQueue: " ; // Display PriorityQueue print_r ( $pq );  
// clear PriorityQueue $pq -> clear(); echo " PriorityQueue after clearing: " ; print_r ( $pq );  
?>
Exit:
Initial PriorityQueue: DsPriorityQueue Object ([0] = > Three [1] = > Two [2] = > One) PriorityQueue after clearing: DsPriorityQueue Object()
Program 2:  
// Declare a new PriorityQueue $pq = new DsPriorityQueue();  
// Add items to PriorityQueue $pq -> push ( "Geeks" , 10); $pq -> push ( "for" , 20); $pq -> push ( "Geeks" , 30); echo " Initial PriorityQueue: " ; // Display PriorityQueue print_r ( $pq );  
// clear PriorityQueue $pq -> clear(); echo " PriorityQueue after clearing: " ; print_r ( $pq );  
?>
Exit:
Initial PriorityQueue: DsPriorityQueue Object ([0] = > Geeks [1] = > for [2] = > Geeks) PriorityQueue after clearing: DsPriorityQueue Object()
Link: http://php.net/manual/en/ds-priorityqueue.clear.php

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