newby question : function parameter passing

Help. I'm new to php. I wrote a function that did not seem to work so
I checked whether the parameter I was passing to the function was
actually being used. I found that it wasn't. When I run the following
code I get:
>
Testcheck:
>
and nothing else. It seems that the variable is not being passed to
the function. Here is the code:
>
function file_write_position($textcheck) {
print "Testcheck: " . $testcheck . "<br>\n\n";
return;
}
>
$testcheck="# Test Call Area";
file_write_position($testcheck);
>
What am I doing wrong??
>
A
>

>
The parameter is called $textcheck, but you are using $testcheck inside
the function.

>Help. I'm new to php. I wrote a function that did not seem to work so
>I checked whether the parameter I was passing to the function was
>actually being used. I found that it wasn't. [...]