Hi all,

Why is it not possible to have dynamic default function parameters?

This would give the possibility to execute any code snippet when the default value will be used in a function code.

At current time you can only define
function f( $v=<statis_val>) {
  return $v;
}

return f();
what would result in: <static_val>

BUT sometimes there must be a dynamic part. For example when dealing with times. Consider the following:
function t( $v=null) {
if ($v===null) $v=time();
return date( "r", $v);
}
return t();
what would return the current time formatted.

With dynamic defaults this would enable the following:
function t($v=time()) {
return date( "r", $v);
}
return t();

Additionally that *should* be used to give access to global variables:
$d = time();
function t($v=$d) {
return date( "r", $v);
}
return t(); // formatted time of script start..or given time

Another good idea would be to execute the variables from within context:
$d = 1;
function t($v=$d) {
return $v;
}
function t2() {
$d=2;
return t();
}
function t3($v=$GLOBALS['d']) {
return $v;
}
return t();   // --> 1
return t2();  // --> 2
return t3();  // --> 1

greetings marcus