memory_get_usage

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

Returns the amount of memory allocated to PHP

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.

Returns:

Returns the memory amount in bytes.

Changelog:

5.2.1

Compiling with --enable-memory-limit is no longer required for this function to exist.

5.2.0

real_usage

Examples:

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
 
?>