FFI::memcmp

(PHP 7 >= 7.4.0, PHP 8)

FFI::memcmp — Compares memory areas

Description

public static function FFI::memcmp(string|FFI\CData &$ptr1, string|FFI\CData &$ptr2, int $size): int

Compares size bytes from the memory areas ptr1 and ptr2. Both ptr1 and ptr2 can be any native data structures (FFI\CData) or PHP strings.

Parameters

ptr1: The start of one memory area.
ptr2: The start of another memory area.
size: The number of bytes to compare.

Return Values

Returns a value less than 0 if the contents of the memory area starting at ptr1 are considered less than the contents of the memory area starting at ptr2, a value greater than 0 if the contents of the first memory area are considered greater than the second, and 0 if they are equal.