The Ds\Map::allocate() function is an inbuilt function in PHP which is used to allocate enough memory for required capacity.
Syntax:
void public Ds\Map::allocate( $capacity )
Parameters: This function accepts single parameter $capacity which indicate number of capacity allocated.
Return Value: This function does not return any values.
Below programs illustrate the Ds\Map::allocate() function in PHP:
Program 1:
<?php   // Create new map $map = new \Ds\Map();   // Use capacity() function to // display the capacity of map var_dump($map->capacity());   // Allocate capacity $map->allocate(50);   // Display capacity var_dump($map->capacity());   // Allocate capacity $map->allocate(80);   // Display capacity var_dump($map->capacity()); ?> |
Output:
int(8) int(64) int(128)
Program 2:
<?php   // Create new map $map = new \Ds\Map();   // Declare capacity array $arr = array(10, 20, 30, 40);   // Loop run for every array element foreach ($arr as $val) {           // Allocate capacity     $map->allocate($val);       // Display capacity of map     var_dump($map->capacity()); }   ?> |
Output:
int(16) int(32) int(32) int(64)
Reference: https://www.php.net/manual/en/ds-map.allocate.php
