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phpclassfunctionvariablespublic

PHP put null if value not sent to public function

I thought this would be easy, but some reason it is not work

public function test($data = null){

}

but when I want to send some data to the function it turns it to null so how can i have it so that if i dont send anything it is null otherwise it the data I sent

Solution 
  • function test($data = null){
     echo $data;
}

test('abcd'); // output abcd

    see working example http://codepad.viper-7.com/Z8T23k