PHP-参数默认值

Question

I have a function with multiple parameters. Sometimes the user may need to specify, say, the first, second, and fourth, but not the third. In JavaScript we can do that easily using an anonymous object as a single parameter for the whole function :

function foo(args) {
    if(args.arg0 != null) alert(args.arg0);
    if(args.arg1 != null) alert(args.arg2);
    if(args.arg2 != null) alert(args.arg1);
}

foo({
   arg0: 'foo',
   arg2: 10
});

If i want to do that in PHP, i can use an associative array to play the same role as this anonymous objects "args" in the function above :

foo(array(
   'arg0' => 'foo',
   'arg2' => 10
));

Which would not be possible using multiple parameters as one may not write :

foo('foo', , 10);

For some reason i find using arrays dirty for that, and wonder if there isn't a "cleaner" way.

Thanks for your help :)

Answer 1

I agree with other commenters that say an array is a good solution. However, if you still want a different way to handle this check func_get_args()