在PHP中使用odbc_exec时使用try-catch语句的异常行为

Question

In an earlier question , I got the advice to use a try-catch statement on an odbc_connect call. Well, said and done, that's what I've tried to do.

The following code, which tries to connect to a database using bogus login information, does not work as excpected.

<?php
  try
  {
    odbc_connect('BogusDatabase','BogusUser','BogusPassword');
  }
  catch (Exception $e)
  {
    echo "Something went wrong!";
  }
?>

I would expect the output to be a string saying "Something went wrong!". Instead I get this:

I'm using Wampserver to run my PHP code. I don't know if this is a part of the problem.

Answer 1

As @Aurimas said, you have to use error_handler to do that. http://php.net/manual/en/function.set-error-handler.php

this function look after the errors that occured in your script and call a function that you provide each time an error is throwed.

A simple handler is

function($errno, $errstr, $errfile, $errline ) {
    throw new ErrorException($errstr, $errno, 0, $errfile, $errline);
}

It throws a ErrorException each time an error is raised in your script. so this whole script will behave as you expect :

 set_error_handler(function($errno, $errstr, $errfile, $errline ) {
    throw new ErrorException($errstr, $errno, 0, $errfile, $errline);
 });
 try
{
  odbc_connect('BogusDatabase','BogusUser','BogusPassword');
}
catch (Exception $e)
{
  echo "Something went wrong!";
}

Answer 2

On PHP manual Exeptions :

Internal PHP functions mainly use Error reporting, only modern Object oriented extensions use exceptions. However, errors can be simply translated to exceptions with ErrorException

Take a look at the ErrorException and set your custom error handle, to catch these errors.

Answer 3

The function is not throwing an Exception. Instead, it's triggering a warning. If you don't want warnings to display, you can use the error_reporting() to display only actual errors.