PHP Ds\Queue capacity() Function

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The Ds\Queue::capacity() Function in PHP is used to check the current capacity of a Queue instance.

Syntax:

int public Ds\Queue::capacity ( void )

Parameters: This function does not accepts any parameters.

Return Value: This function returns the current capacity of the Queue instance.

Below programs illustrate the Ds\Queue::capacity() function in PHP:

Program 1:

PHP

<?php 
 
// Declare new Queue 
$q = new \Ds\Queue(); 
 
// Use capacity() function 
// to check the current capacity
var_dump($q->capacity()); 
 
?> 

Output:

int(8)

Program 2:

PHP

<?php 
 
// Declare new Queue 
$q = new \Ds\Queue(); 
 
echo("Current Capacity is: "); 
 
// Use capacity() function 
// to check the current capacity
var_dump($q->capacity()); 
 
echo("Current Capacity 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:

Current Capacity is: int(8)
Current Capacity is: int(8)
int(128)

Reference: http://php.net/manual/en/ds-queue.capacity.php

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