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PHP memory_get_usage

PHP original manual for memory_get_usage [ show | php.net ]

memory_get_usage

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

memory_get_usage — Returns the amount of memory allocated to PHP

Description

int memory_get_usage ([ bool $real_usage = FALSE ] )

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.

Changelog

Version Description
5.2.1 Compiling with --enable-memory-limit is no longer required for this function to exist.
5.2.0 real_usage was added.

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