Open In App

PHP Ds\Queue allocate() Function

Last Updated : 23 Aug, 2019
Comments
Improve
Suggest changes
Like Article
Like
Report
The Ds\Queue::allocate() Function in PHP is used to allocate memory for a Queue class instance. This function allocates sufficient memory for a given capacity for an instance of Queue class. Syntax: 
void public Ds\Queue::allocate ( int $capacity )
Parameters: This function accepts a single parameter $capacity which is an integral value denoting the number of values for which capacity is needed to be allocated. Return Value: This method does not returns any value. Below programs illustrate the Ds\Queue::allocate() function in PHP: Program 1: php 
<?php 

// Declare new PriorityQueue 
$pq = new \Ds\PriorityQueue(); 

echo("Allocated Space is: "); 

// Use capacity() function 
var_dump($pq->capacity()); 

echo("Allocated space is: "); 

// Use allocate() function to 
// allocate capacity 
$pq->allocate(50); 

// Display the allocated vector 
// capacity 
var_dump($pq->capacity()); 

?>
Output: 
Allocated Space is: int(8)
Allocated space is: int(64)
Program 2: php 
<?php 
 
// Declare new Queue 
$q = new \Ds\Queue(); 
 
echo("Allocated Space is: "); 
 
// Use capacity() function 
var_dump($q->capacity()); 
 
echo("Allocated space is: "); 
 
// Use allocate() function to 
// allocate capacity 
$q->allocate(5); 
 
// Display the allocated vector 
// capacity 
var_dump($q->capacity()); 
 
// Use allocate() function to 
// allocate capacity 
$q->allocate(120); 
 
// Display the allocated vector 
// capacity 
var_dump($q->capacity()); 
 
?>
Output: 
Allocated Space is: int(8)
Allocated space is: int(8)
int(128)
Reference: http://php.net/manual/en/ds-queue.allocate.php

Next Article
PHP | DsStack allocate() Function
author
gopaldave
Improve
Article Tags :

Similar Reads

We use cookies to ensure you have the best browsing experience on our website. By using our site, you acknowledge that you have read and understood our Cookie Policy & Privacy Policy
Lightbox