Get argument count of a PHP function with optional arguments

Question

Can any one tell which function to use to determine the number of arguments passed within a function that has optional arguments?

Felix Kling · Accepted Answer · 2010-12-28 13:13:36Z

6

You mean func_num_args? That will count the passed arguments, but not those that are not passed and get the default value:

function foo($a, $b='bar') {
   echo func_num_args() . PHP_EOL;
}

foo(1);
foo(1,2);
foo(1,'bar');

prints

1
2
2

answered Dec 28, 2010 at 13:00

Felix Kling

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3 Comments

I think he wants to test if a function xyz($a, $b='') was called like xyz(1) or xyz(1, 'foo')

@ThiefMaster: Isn't that what func_num_arg is doing? Or I don't get your point...

Indeed. I thought func_num_args counts all arguments.. no matter if default or passed manually.