FFI::memcmp
PHP function
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(PHP 7 >= 7.4.0, PHP 8)
Compares memory areas
Description
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
ptr1The start of one memory area.
ptr2The start of another memory area.
sizeThe 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.