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
- memory_get_peak_usage() - Returns the peak of memory allocated by PHP
← memory_get_peak_usage
php_ini_loaded_file →
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
本文档系腾讯云开发者社区成员共同维护，如有问题请联系 cloudcommunity@tencent.com
