function name

In php, a function name can be alphanumeric and underscore. but the first character can't be a number. let's see the zend mock question for this.

Question:

What is the output of the following?

function 1dotEach($n)
{
if ($n > 0)
{
1dotEach(--$n);
echo ".";
}else
{
return $n;
}
}
1dotEach(4);
?>

Answer:

1. ....0
2. Parse Error: Syntax Error
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