PHP Class Const Constant Access Method Example

Example. Const constant Access

The code is as follows	Copy Code
Class Math { Const num=3.14; Public Function Shownum () { return self::num; } } echo Math::num. " <br/> "; $math =new Math (); echo $math->shownum (); Results: 3.14 3.14

example, variable access

The code is as follows	Copy Code
Class Math { Const num=3.14; var $abc = ' AA '; Public Function Shownum () { return self::num; } } echo Math::abc. " <br/> ";

Tip fatal error:undefined class constant ' abc ' in e:xxx1.php on line 12

Summary: So const is a variable that defines variables that can be accessed using math::num, while internal variables defined by VAR use math::num access to indicate that the variables are undefined.