在将其导出到.php文件之前检查内存大小

Question

I wrote a PHP script that index the contents of my site and stores it in multi-dimensional arrays. Then I export what is in the memory, that array, to a .php file to include and access later.

How can I check the size of the memory or the size of the memory associated with the variable I'm exporting before I save it to a file.

For example, if less than 1gb, export. Else, do nothing and erase what's in memory associated with variable $x.

How could I do this?

Answer 1

try with:

memory_get_usage()

call this function before and after create your array, and take the difference.

echo "At the start we're using (in bytes): ",
     memory_get_usage() , "
<br>";

... array...

echo "After, we're using (in bytes): ",
     memory_get_usage(),"
<br>"; 

or

$before  = memory_get_usage();
... array ...
$after = memory_get_usage();
echo round(($after-$before)/1024/1024, 2)." MB
";