php function does not define parameter method

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';
	 myfun('aa', 3.4, 5, 6, 7);
	 echo '
';
	 myfun();
?>

Result:

78.5
113.04
Number of parameters: 2 array(2) { [0]=> int(1) [1]=> ; string(1) "2" }
Number of parameters: 5 array(5) { [0]=> string(2) "aa" [1]=> float(3.4 ) [2]=> int(5) [3]=> int(6) [4]=> int(7) }
Number of parameters: 0 array(0) { }

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