Studying the Singleton design pattern, I was testing:
class Test {
public static $var = "XYZ";
static function class() {
return __CLASS__;
}
static function self() {
return self::$var;
}
static function compare() {
return self === __CLASS__;
}
}
echo Test::$var; //XYZ
echo Test::class()::$var; //XYZ
echo Test::self(); //XYZ
var_dump(Test::compare()); //bool(false)
I noticed that self is used to access a variable or function within the class, and __CLASS__ returns the reference of the class itself
Am I right? Is that the only difference between the two? Are there cases where you both use one or the other? Why do I do this does not work?
class Test {
public static $var = "XYZ";
static function class() {
return __CLASS__::$var;
}
static function self() {
return self;
}
}
echo Test::class(); //syntax error, unexpected '::' (T_PAAMAYIM_NEKUDOTAYIM), expecting ';'
echo Test::self()::$var; //Uncaught Error: Class 'self' not found