php - String comparison using '==' vs. 'strcmp()'

Question

It seems that PHP's === operator is case sensitive. So is there a reason to use strcmp()?

Is it safe to do something like the following?

if ($password === $password2) { ... }

Answer 1

The reason to use it is because strcmp

returns < 0 if str1 is less than str2; > 0 if str1 is greater than str2, and 0 if they are equal.

=== only returns true or false, it doesn't tell you which is the "greater" string.