Description:
------------
I am writing an application which allows the 'user' to specify some PHP code. This is then invoked at run-time by the create_function() function.

I want to provide a facility for pre-checking this code by using a custom error-handler, however the errors seem to be getting handled by the built-in error handler.

Reproduce code:
---------------
function lister_check_errors($errno, $errstr, $errfile, $errline)
{
    global $lister_embed_errors;
    $lister_embed_errors.="$errno: $errstr<br />\n&nbsp; in line $errline";
}
function lister_check_syntax($code,$params)
{
    global $lister_embed_errors;
    $lister_embed_errors='';
    $errhandler=set_error_handler('lister_check_errors');
    $fn=create_function($params,$code);
    restore_error_handler();
    return($lister_embed_errors);
}

$stored=lister_check_syntax("{{{{ bad stuff", '$something');
print strlen($stored);

Expected result:
----------------
I expected to just get an integer back, but it behaves as if I hadn't called set_error_handler()

Actual result:
--------------
The following was output to the browser:

Parse error: parse error, unexpected T_STRING in /home/colin/public_html/form/check_err.php(15) : runtime-created function on line 1