PHP Ds\Queue capacity() Function

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