(PHP 4, PHP 5, PHP 7) Determine whether a variable is empty

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Applies the callback to the elements of the given arrays

(PHP 5 >= 5.3.0, PHP 7) Creates an alias for a class

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Check for lowercase character(s)

(PHP 5, PHP 7) Gets modifier names public static

(PHP 5, PHP 7) Construct a ReflectionProperty object

(PHP 4, PHP 5, PHP 7) Create an array array array

(PHP 4, PHP 5, PHP 7) Get the type of a variable

(PHP 5 >= 5.3.0, PHP 7) Call a static method and pass the arguments as array

(PHP 4, PHP 5, PHP 7) Get string value of a variable