A brief talk on the function and significance of the VAR keyword in PHP

var is the alias of public, which is used to define the common attribute in the class, but the historical problem is now not var.

PHP Official Explanation: The class attribute must be defined as public, protected, and private, and if defined with Var, it is considered public.

Note: For compatibility reasons, the use of the var keyword in PHP 4 to define a variable is still valid in PHP 5 (just as an alias for the Public keyword).

In versions prior to PHP 5.1.3, this syntax produces a e_strict warning

A brief talk on the function and significance of the VAR keyword in PHP