Returns the amount of memory allocated to PHP
Syntax
memory_get_usage(bool $real_usage = false): int
Parameters
real_usageSet this to true to get total memory allocated from system, including unused pages. If not set or false only the used memory is reported.
Return
Returns the memory amount in bytes.
Examples
1 · void
<? $return = memory_get_usage(); echo $return; ?>
409016
2 · real_usage
<? $real_usage = true; $return = memory_get_usage($real_usage); echo $return; ?>
2097152
3
<?
echo memory_get_usage() . PHP_EOL;
$str_repeat = str_repeat("repeat", 1000);
echo memory_get_usage() . PHP_EOL;
unset($str_repeat);
echo memory_get_usage();
?>409744 417936 409744
4
<?
function bytes($size)
{
$unit = array('b', 'kb', 'mb', 'gb', 'tb', 'pb');
return @round($size / pow(1024, ($i = floor(log($size, 1024)))), 2) . $unit[$i];
}
$real_usage = true;
$return = memory_get_usage($real_usage);
echo bytes($return);
?>2mb
