php - How can I make my function execute even when no parameter is entered? -

i'm teaching myself php through book , make easier made myself function save myself having write echo "<br/>"; million times. function works fine after accidentally leaving out parameter , getting error tried make if left function empty add 1 <br/> can't seem work.

here code after last attempt (which try case null: echo "<br/>";):

function br($break){     switch ($break){         case 1:             echo "<br/>";             break;         case 2:             echo "<br/><br/>";             break;         case 3:             echo "<br/><br/><br/>";             break;         case 4:             echo "<br/><br/><br/><br/>";             break;         case 5:             echo "<br/><br/><br/><br/><br/>";             break;         case null:             echo "<br/>";     }  } 

any ideas? guys!

p.s. sorry if silly question, started learning php on monday , programming experience limited :)

try this:

function br($break = 1){  } 

btw, case, can use:

echo str_repeat('<br />', 5); 

which create 5 br's, take here: http://php.net/str_repeat
also, when in doubt something, first time check php.net documentation, there might function want already.