Does anyone know when we use underscores? The method base64_encode uses an underscore, but urlencode doesn't. The name php_uname has an underscore, but phpversion doesn't. Why? Did anyone think about this? Did anyone edit the API?
Meanwhile, function strcmp is case-sensitive, but strcasecmp is not. strpos is case-sensitive, but stripos is not. Does the letter i signify case-insensitivity or does the word case? Who can remember? You better.