Function sys_getloadavg in PHP < 5.1.3
According to the document of PHP official website, http://php.net/sys_getloadavg sys_getloadavg (PHP 5 >= 5.1.3) sys_getloadavg — Gets system load average So, it’s only for PHP…
mbstring provides multibyte specific string functions that help you deal with multibyte encodings in PHP. In addition to that, mbstring handles character encoding conversion between the possible encoding pairs. mbstring is designed to handle Unicode-based encodings such as UTF-8 and UCS-2 and many single-byte encodings for convenience. Read more about PHP: function mb_str_split …
According to the document of PHP official website, http://php.net/manual/en/function.str-split.php
str_split
(PHP 5) str_split — Convert a string to an array