memory_get_usage
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
TRUEto get total memory allocated from system, including unused pages. If not set orFALSEonly 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_limit
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Licensed under the Creative Commons Attribution License v3.0 or later.
https://secure.php.net/manual/en/function.memory-get-usage.php
