constant vs properties in php?

[zenovskiiqqqw]

I just don't get it,\[code\]class MyClass{ const constant = 'constant value'; function showConstant() { echo self::constant . "\n"; }}class MyClass{ public $constant = 'constant value'; function showConstant() { echo $this->constant . "\n"; }}\[/code\]Whats the main difference? Its just same as defining vars, isn't it?ThanksAdam Ramadhan