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PHP Ds\Queue capacity() Function

Last Updated : 11 Jul, 2025
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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: https://www.php.net/manual/en/ds-queue.capacity.php
 


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