PHP 7.1.0 Release Candidate 4 Released


(PHP 5 >= 5.2.0, PHP 7)

memory_get_peak_usageReturns the peak of memory allocated by PHP


int memory_get_peak_usage ([ bool $real_usage = false ] )

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.

Return Values

Returns the memory peak 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.

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