Cara menggunakan memory allocation in php

PHP | Ds\Stack allocate() Function

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The Ds\Stack::allocate() function is an inbuilt function in PHP which is used to allocate memory for required capacity. This function allocates sufficient memory for a given capacity of an instance of Stack class.
Syntax: 
 

void Ds\Stack::allocate( $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 allocate.
Return Value: This function does not return any value.
Below programs illustrate the Ds\Stack::allocate() function in PHP:
Program 1: 
 

<?php

$stack = new \Ds\Stack();

echo("Allocated Space is: ");

var_dump($stack->capacity());

echo("Allocated space is: ");

$stack->allocate(50);

var_dump($stack->capacity());

?>

Output:

Allocated Space is: int(8)
Allocated space is: int(50)

Program 2: 
 

php

<?php

$stack = new \Ds\Stack();

echo("Allocated Space is: ");

var_dump($stack->capacity());

echo("Allocated space is: ");

$stack->allocate(5);

var_dump($stack->capacity());

echo("Allocated space is: ");

$stack->allocate(120);

var_dump($stack->capacity());

?>

Output:

Allocated Space is: int(8)
Allocated space is: int(8)
Allocated space is: int(120)

Reference: https://www.php.net/manual/en/ds-stack.allocate.php