PHP 4 >= 4.3.2, PHP 5, PHP 7, PHP 8
memory_get_usage - Returns the amount of memory allocated to PHP
Code Examples

memory_get_usage( [bool$real_usage = false] ): int

Returns the amount of memory, in bytes, that's currently being allocated to your PHP script.



Set this to true to get total memory allocated from system, including unused pages. If not set or false only the used memory is reported.


PHP does not track memory that is not allocated by emalloc()

Return Values

Returns the memory amount in bytes.

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