(PHP 5 >= 5.1.0, PHP 7) Seek to specified line

(PHP 5 >= 5.0.0, PHP 7) Get the number of public properties in the ArrayObject

(PHP 5 >= 5.3.0, PHP 7) Compare elements in order to place them correctly in the heap while sifting up.

(PHP 5 >= 5.0.0, PHP 7) Creates a copy of the ArrayObject.

(PHP 5 >= 5.1.0, PHP 7) Has children public

(PHP 5 >= 5.3.6, PHP 7) Gets the file extension

(PHP 5 >= 5.1.0, PHP 7) Gets character from file

(PHP 5 >= 5.3.0, PHP 7) Compare elements in order to place them correctly in the heap while sifting up.

(PHP 5 >= 5.1.2, PHP 7) Sets the class used with

(PHP 5 >= 5.2.0, PHP 7) Sort the entries by keys using a user-defined comparison function