(PECL sync >= 1.0.0) Waits for a read lock

(PHP 4, PHP 5, PHP 7) Return part of a string

(PHP 4, PHP 5, PHP 7) Find the position of the last occurrence of a substring in a string

(PHP 4, PHP 5, PHP 7) Perform a regular expression match

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Generates XML for a method request

(PHP 5, PHP 7) Export public static string R

(PECL apd >= 0.2) Echo to the debugging socket

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Converts from Julian Day Count to a supported calendar

(PHP 4, PHP 5, PHP 7) Logs in to an FTP connection

(PECL svn >= 0.2.0) Return true if the path points to a directory, false otherwise