memory_get_usage

(PHP 4 >= 4.3.2, PHP 5, PHP 7)

memory_get_usageReturns the amount of memory allocated to PHP

Description

memory_get_usage ([ bool $real_usage = false ] ) : int

Returns the amount of memory, in bytes, that's currently being allocated to your PHP script.

Parameters

real_usage

Set this to true to get total memory allocated from system, including unused pages. If not set or false only the used memory is reported.

Note:

PHP does not track memory that is not allocated by emalloc()

Return Values

Returns the memory amount in bytes.

Examples

Example #1 A memory_get_usage() example

<?php
// This is only an example, the numbers below will
// differ depending on your system

echo memory_get_usage() . "\n"; // 36640

$a = str_repeat("Hello", 4242);

echo memory_get_usage() . "\n"; // 57960

unset($a);

echo memory_get_usage() . "\n"; // 36744

?>

See Also

© 1997–2020 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.memory-get-usage.php