In PHP v.5.3.8, memory_get_peak_usage(true) always returns zero (found on Debian Linux).
(PHP 5 >= 5.2.0)
memory_get_peak_usage — Returns the peak of memory allocated by PHP
Returns the peak of memory, in bytes, that's been allocated to your PHP script.
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.
Returns the memory peak in bytes.
|5.2.1||Compiling with --enable-memory-limit is no longer required for this function to exist.|
|5.2.0||real_usage was added.|