Function calls with a variable name work as exspected when
called by a simple expression:

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<?php
 
function name_lang() {
        printf("I am a function\n");
}
 
$x = "name";
$y = "_lang";
$z = $x.$y;
$z();
Content-type: text/html
 
I am a function
-----


But PHP fails to parse the () function call operator in the
following environment:

-----
($x.$y)();
<br>
<b>Parse error</b>:  parse error in <b>-</b> on line <b>11</b><br>
-----