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Returns the amount of memory allocated to PHP
PHP Options/Info Functions
PHP Manual

memory_get_usage

(PHP 4 >= 4.3.2, PHP 5)

memory_get_usageReturns 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 the real size of memory allocated from system. If not set or FALSE only the memory used by emalloc() is reported.

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


PHP Options/Info Functions
PHP Manual