(PHP 5 >= 5.5.11, PHP 7) Read from file public

(PHP 5 >= 5.3.0, PHP 7) Serialize an ArrayObject

(PHP 5 >= 5.3.0, PHP 7) Rewind iterator back to the start

(PHP 5 >= 5.5.0, PHP 7) Add/insert a new value at the specified index

(PHP 5 >= 5.3.0, PHP 7) Returns the mode of iteration

(PHP 5 >= 5.0.0, PHP 7) Returns the value at the specified index

(PHP 5 >= 5.3.0, PHP 7) Import a PHP array in a

(PHP 5 >= 5.3.0, PHP 7) Sets the value at the specified $index to $newval

(PHP 5 >= 5.1.0, PHP 7) Portable file locking

(PHP 5 >= 5.1.0, PHP 7) Call a function for every element in an iterator