PHP SplPriorityQueue insert() Function

The SplPriorityQueue::insert() function is an inbuilt function in PHP which is used to inserts an element in the queue by sifting the elements. Insert elements in priority queue by given priority.

Syntax:

bool SplPriorityQueue::insert( mixed $value, mixed $priority )

Parameters: This function accepts two parameters as mentioned above and described below:

• $value: This parameter holds the value that need to inset in priority queue.
• $priority: This parameter holds the priority of priority queue.

Return Value: This function returns true if elements inserted successfully.

Example:

PHP

<?php

// Declare a class
class priorityQueue extends SplPriorityQueue {

    // Compare function to compare priority
    // queue elements
    public function compare($p1, $p2) {
        if ($p1 === $p2) return 0;
        return $p1 < $p2 ? -1 : 1;
    }
}

// Create an object of priority queue
$obj = new priorityQueue();

// Insert elements into the queue
$obj->insert("Geeks",2);
$obj->insert("GFG",1);
$obj->insert("G4G",3);
$obj->insert('G',4);

// Display the priority queue elements
var_dump($obj);

?>

Output

object(priorityQueue)#1 (3) {
  ["flags":"SplPriorityQueue":private]=>
  int(1)
  ["isCorrupted":"SplPriorityQueue":private]=>
  bool(false)
  ["heap":"SplPriorityQueue":private]=>
  array(4) {
    [0]=>
    array(2) {
      ["data"]=>
      string(1) "G"
      ["priority"]=>
      int(4)
    }
    [1]=>
    array(2) {
      ["data"]=>
      string(3) "G4G"
      ["priority"]=>
      int(3)
    }
    [2]=>
    array(2) {
      ["data"]=>
      string(5) "Geeks"
      ["priority"]=>
      int(2)
    }
    [3]=>
    array(2) {
      ["data"]=>
      string(3) "GFG"
      ["priority"]=>
      int(1)
    }
  }
}

Reference: https://www.php.net/manual/en/splpriorityqueue.insert.php

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