(PHP 4 <= 4.1.0, PECL dbplus >= 0.9) Creates a new DB++ relation

(PECL imagick 2.0.0) Returns an array representing the font metrics

(PHP 5, PHP 7) Rewind the iterator to the first element of the top level inner iterator

(PECL apcu >= 5.0.0) Get total cache hits

(PECL maxdb >= 1.0) Check if there any more query results from a multi query

(PHP 4, PHP 5, PHP 7) Set/get the various assert flags

(PECL imagick 2.0.0) Scales an image proportionally 2x

(PECL imagick 2.0.0) Gets the index of the current active image

(PHP 5 >= 5.1.2, PHP 7) Constructs a RecursiveDirectoryIterator

(PECL expect >= 0.1.0) Execute command via Bourne shell, and open the PTY stream to the process