PHP custom exception message

Question

I'm trying to display a custom error message if a method doesnt' exist as Method() or as getMethod():

public function __call($name, $args = array()){
  $getter = "get{$name}";

  try {
    echo call_user_func_array(array(&$this, $getter), $args);
  } catch (Exception $e) {

    trigger_error($e->getFile.' on line '.$e->getLine.': Method '.$name.' is not defined.', E_USER_ERROR)
  }
}

but it doesn't work. I get a "connection closed by remote server" message in the browser :|

yes I know about that, but I want to use this try catch thing because it tells me the line / file where the error is — Alex
– Alex, Commented Jun 30, 2011 at 21:18
@Alex: php.net/manual/en/language.exceptions.php and stackoverflow.com/questions/2018486/… — Tomalak
– Tomalak, Commented Jun 30, 2011 at 21:31

user142162 · Accepted Answer · 2011-06-30 21:18:05Z

3

You would use the method_exists function:

if(!method_exists($this, $name))
{
    // trigger_error(...);
}

If you wanted data such as where the invalid method was called from, you can use debug_backtrace:

class X
{
    public function __call($name, $a)
    {
        $backtrace = debug_backtrace();
        $backtrace = $backtrace[1];
        // $backtrace['file']
        // $backtrace['line']
        // $backtrace['function']
        // $backtrace['class']
        // $backtrace['object']
    }
}

$o = new X();
$o->Hello();

answered Jun 30, 2011 at 21:18

user142162

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2 Comments

user142162 Over a year ago

@Alex: Yes, check my answer. Just access those array elements that I have listed.

dynamic Over a year ago

you only need to throw new Exception('...');

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