memory_get_usage

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

Parameters

real_usage

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.

Note:

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

Return Values

Returns the memory amount in bytes.

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