(PHP 4 >= 4.3.2, PHP 5, PHP 7)
memory_get_usage — Returns the amount of memory allocated to PHP
$real_usage = FALSE
] ) : intReturns the amount of memory, in bytes, that's currently being allocated to your PHP script.
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()
Returns the memory amount in bytes.
| 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.
|
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
?>