sodium_memcmp
PHP 7 >= 7.2.0, PHP 8
sodium_memcmp - Test for equality in constant-time
Manual
sodium_memcmp(
string$string1,
string$string2 ): int
Compare two strings in constant-time.
In practice, you almost always want to use hash_equals instead, since it provides the same logic but returns a bool instead of an int. However, if you're using the return value of a comparison in a calculation that's timing-sensitive, and worried about timing leaks with bool-to-int conversions, sodium_memcmp is an ideal replacement.
Parameters
- string1
-
String to compare
- string2
-
Other string to compare
Return Values
Returns 0 if both strings are equal; -1 otherwise.