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# memory_get_usage

(PHP 4 >= 4.3.2, PHP 5)

memory_get_usage -- Returns the amount of memory allocated to PHP

## Description

int memory_get_usage ( void )

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

memory_get_usage() will only be defined if your PHP is compiled with the --enable-memory-limit configuration option.

範例 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 memory_limit.

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