PHP: $ this vs self

Question

There is such code:

class main { const MYCONST = "Hello world"; public function printout() { echo $this::MYCONST, "\n"; echo self::MYCONST; } } $obj = new main; $obj->printout();

What is the difference between calls

 $this::MYCONST; self::MYCONST;

$ this - for objects inside the class self - for use in a static context inside the class
I know about static and later static binding too, I'm not interested in static

cheops cheops 18.1k 9 32 120 · Answer 1 · 2016-08-18T12:41:37

You can call self::MYCONST from any class method, from normal and from static. You can access $this::MYCONST only from the object, i.e. in a static class method, such a call will cause an error

 class main { const MYCONST = "Hello world"; public static function printout() { echo $this::MYCONST, "\n"; } } echo main::printout(); // Fatal error: Class name must be a valid object or a string i

Well, if this is the only difference, then it is a pity, because there is nothing special
@MaximPro features with self begin with inheritance, at the class level, yes, nothing special.

PHP: $ this vs self

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