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Bug #12136 set_error_handler doesn't trap all errors
Submitted: 2001-07-13 05:21 UTC Modified: 2001-07-15 12:51 UTC
From: scott at datalink dot net dot au Assigned:
Status: Closed Package: Scripting Engine problem
PHP Version: 4.0.6 OS: Redhat Linux 7.0
Private report: No CVE-ID: None
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From: scott at datalink dot net dot au
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 [2001-07-13 05:21 UTC] scott at datalink dot net dot au
I believe this is the same bug as bug report 11803, but I think the scope is wider than initially reported.

The bug: set_error_handler does not trap an error if I try to call a method that does not exist.

This is causing grief when a PEAR-style method returns one type of object on success and another on failure.   The code expecting the success will call a non-existant method.

Here's some code to emulate the problem:

// set up my custom error handler

function handleError($errno, $errstr, $errfile, $errline, $obj)
  print "<b>My Error Handler:</b> $errstr on line $errline";

// define a really basic class
class Foo
  var $i;

$myFoo = new Foo();

// call a non-existant property (this calls the errorHandler OK)
print $myFoo->choo;

// now call a non-existant method (this bypasses the errorHandler!!!)



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 [2001-07-15 12:51 UTC]
set_error_handler() is not supposed to be able to trap all errors, only recoverable errors.  Currently, a call to an undefined function/method is defined as a non-recoverable error, as in, an error that leaves the engine in an unstable state, and thus, you cannot override this error with a userland error handler.
"This behavior is by design" :)
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