(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Get the objectʼs timezone

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Get last error message on the object

(PHP 5, PHP 7) Finds position of first occurrence of a needle within a haystack

(PHP 4, PHP 5, PHP 7) Override the current domain

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Get the error text from the last operation

(PHP 5, PHP 7) Composes a MIME header field