memory_get_usage
(PHP 4 >= 4.3.2, PHP 5)
memory_get_usage — Returns the amount of memory allocated to PHP
说明
int memory_get_usage ([ bool $real_usage = false ] )Returns the amount of memory, in bytes, that's currently being allocated to your PHP script.
参数
- real_usage
-
Set this to TRUE to get the real size of memory allocated from system. If not set or FALSE only the memory used by emalloc() is reported.
返回值
Returns the memory amount in bytes.
更新日志
| 版本 | 说明 |
|---|---|
| 5.2.1 | Compiling with --enable-memory-limit is no longer required for this function to exist. |
| 5.2.0 | real_usage was added. |
范例
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() . "
"; // 36640
$a = str_repeat("Hello", 4242);
echo memory_get_usage() . "
"; // 57960
unset($a);
echo memory_get_usage() . "
"; // 36744
?>
参见
- memory_get_peak_usage() - Returns the peak of memory allocated by PHP
- memory_limit
