PHP hrtime() Function

The hrtime() function returns the system's high resolution time. It is monotonic (cannot go backwards) and is best for precise performance measurements.

Syntax

hrtime(bool $as_number = false): array|int|float

Return Value

Returns an array [seconds, nanoseconds] if as_number is false. Returns nanoseconds as int (64-bit platforms) or float (32-bit platforms) if as_number is true.

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Related Functions

• microtime() - Return current Unix timestamp with microseconds