(No version information available, might only be in Git) Get the current key

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Clear the current session

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Check if this time zone uses daylight savings time

(PHP 7) Return Unicode character by code point value

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Get formatter locale

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Replace regular expression with multibyte support ignoring case

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Checks if the provided string is already in the specified

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Parse string to a timestamp value

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Sort array maintaining index association

(PHP 5 >= 5.5.0, PHP 7, PECL intl >= 3.0.0) Formats an object