Description:
------------
I was trying to create a recursive function with create_function, but I found a weird problem. When I used the magic constant __FUNCTION__, it returned 'lambda_func', instead of 'lambda_1', the actual result create_function returned.

Reproduce code:
---------------
<?php
$func = create_function (
    '$a',
    'return is_array ($a)' . "\n" .
    '    ? array_map (__FUNCTION__, $a)' . "\n" .
    '    : (is_object ($a)' . "\n" .
    '       ? (object) array_map (__FUNCTION__, (array) $object)' . "\n" .
    '       : (is_string ($a)' . "\n" .
    '           ? htmlspecialchars (str_replace ("\n", \'\n\', $a))' . "\n" .
    '           : $a));'
);

var_dump ($func ('string_var', array ('array_var', 'another_var')));
?>


Expected result:
----------------
array(2) {
  [0]=>
  string(9) "array_var"
  [1]=>
  string(11) "another_var"
}

Actual result:
--------------
Warning: array_map(): The first argument, '__lambda_func', should be either NULL or a valid callback in /home/jexus/public_html/test/test.php(22) : runtime-created function on line 2
NULL