update : 2015.11.03
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Returns the amount of memory allocated to PHP
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memory_get_usage

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

memory_get_usage — Returns the amount of memory allocated to PHP

설명

int memory_get_usage ([ bool $real_usage = false ] )

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

인수

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.

반환값

Returns the memory amount in bytes.

변경점

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

예제

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

?>

참고

PHP Options/Info 함수 목록
PHP Manual