[PHP] Exception Handling
Hey guys, Haven't posted in a long time... Happy Memorial Day! I have an issue with exception handling. I'm using a framework that throws a Database_Exception object. I was expecting catch (Exception $var) to be sufficient to catch this, but it doesn't. I have to do catch (Database_Exception $var) to make it work. I've been reading that Exception should be sufficient, since every exception object is a child class of Exception. Did this perhaps change in 5.4? I think it was working properly in 5.3, but I'm not sure. Any clarification would be greatly appreciated! James -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Exception Handling
James Colannino crankycycl...@gmail.com hat am 1. Juni 2012 um 16:25 geschrieben: Hey guys, Haven't posted in a long time... Happy Memorial Day! I have an issue with exception handling. I'm using a framework that throws a Database_Exception object. I was expecting catch (Exception $var) to be sufficient to catch this, but it doesn't. I have to do catch (Database_Exception $var) to make it work. I've been reading that Exception should be sufficient, since every exception object is a child class of Exception. Did this perhaps change in 5.4? I think it was working properly in 5.3, but I'm not sure. Look at the definition of Database_Exception and see if it extends Exception, I'll guess it doesn't. Nothing changed in PHP 5.4 to that. Any clarification would be greatly appreciated! James -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php Marco Behnke Dipl. Informatiker (FH), SAE Audio Engineer Diploma Zend Certified Engineer PHP 5.3 Tel.: 0174 / 9722336 e-Mail: ma...@behnke.biz Softwaretechnik Behnke Heinrich-Heine-Str. 7D 21218 Seevetal http://www.behnke.biz -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Exception Handling
-Original Message-
From: James Colannino [mailto:crankycycl...@gmail.com]
Sent: Friday, June 01, 2012 10:25 AM
To: PHP-General List
Subject: [PHP] Exception Handling
Hey guys,
Haven't posted in a long time... Happy Memorial Day! I have an issue
with exception handling. I'm using a framework that throws a
Database_Exception object. I was expecting catch (Exception $var) to
be sufficient to catch this, but it doesn't. I have to do catch
(Database_Exception $var) to make it work. I've been reading that
Exception should be sufficient, since every exception object is a child
class of Exception. Did this perhaps change in 5.4? I think it was
working properly in 5.3, but I'm not sure.
Any clarification would be greatly appreciated!
James
--
Hi James,
You would have to catch Database_Exception. It is also good practice to
also always catch exception afterwards.
Ex:
Class Database_Exception extends Exception{
Public function __construct($message){
parent::__construct($message);
}
}
Try{
$pdo = new PDO();
If($pdo === false){
Throw new Database_Exception(Failed To Connect);
}
}
Catch(Database_Exception $e){
Echo $e-getMessage();
}
Catch(Exception $e){
Echo $e-getMessage();
}
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Re: [PHP] Exception Handling
On 06/01/12 07:30, ma...@behnke.biz wrote:
James Colanninocrankycycl...@gmail.com hat am 1. Juni 2012 um 16:25
geschrieben:
Hey guys,
Haven't posted in a long time... Happy Memorial Day! I have an issue
with exception handling. I'm using a framework that throws a
Database_Exception object. I was expecting catch (Exception $var) to
be sufficient to catch this, but it doesn't. I have to do catch
(Database_Exception $var) to make it work. I've been reading that
Exception should be sufficient, since every exception object is a child
class of Exception. Did this perhaps change in 5.4? I think it was
working properly in 5.3, but I'm not sure.
Look at the definition of Database_Exception and see if it extends Exception,
I'll guess it doesn't.
Nothing changed in PHP 5.4 to that.
Hey Marco,
Thanks for the reply! That was the first thing I checked.
class Database_Exception extends \FuelException {}
class Fuel_Exception extends \Exception {}
It's extending Exception, as expected. Also, can you throw classes that
don't extend Exception? It was always my understanding that doing so
would cause a fatal error.
James
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Re: [PHP] Exception Handling
On 06/01/12 08:08, James Colannino wrote:
On 06/01/12 07:30, ma...@behnke.biz wrote:
James Colanninocrankycycl...@gmail.com hat am 1. Juni 2012 um 16:25
geschrieben:
Hey guys,
Haven't posted in a long time... Happy Memorial Day! I have an issue
with exception handling. I'm using a framework that throws a
Database_Exception object. I was expecting catch (Exception $var) to
be sufficient to catch this, but it doesn't. I have to do catch
(Database_Exception $var) to make it work. I've been reading that
Exception should be sufficient, since every exception object is a child
class of Exception. Did this perhaps change in 5.4? I think it was
working properly in 5.3, but I'm not sure.
Look at the definition of Database_Exception and see if it extends
Exception,
I'll guess it doesn't.
Nothing changed in PHP 5.4 to that.
Hey Marco,
Thanks for the reply! That was the first thing I checked.
class Database_Exception extends \FuelException {}
class Fuel_Exception extends \Exception {}
It's extending Exception, as expected. Also, can you throw classes
that don't extend Exception? It was always my understanding that
doing so would cause a fatal error.
I was right. From the documentation
(http://php.net/manual/en/language.exceptions.php):
The thrown object must be an instance of the Exception
http://www.php.net/manual/en/class.exception.php class or a subclass
of Exception http://www.php.net/manual/en/class.exception.php. Trying
to throw an object that is not will result in a PHP Fatal Error.
James
Re: [PHP] Exception Handling
On 06/01/12 07:32, Mackintosh, Mike wrote: Hi James, You would have to catch Database_Exception. It is also good practice to also always catch exception afterwards. Hey Mike, Thanks for the reply! I saw this comment in the documentation (http://www.php.net/manual/en/language.exceptions.extending.php) -- it's the first one: |It's important to note that subclasses of the Exception class will be caught by the default Exception handler Of course, I haven't tested the code they posted. I'll do that tonight and confirm or deny the expected result. James |
RE: [PHP] Exception Handling
-Original Message-
From: James Colannino [mailto:crankycycl...@gmail.com]
Sent: Friday, June 01, 2012 11:14 AM
To: PHP-General List
Subject: Re: [PHP] Exception Handling
Hey Mike,
Thanks for the reply! I saw this comment in the documentation
(http://www.php.net/manual/en/language.exceptions.extending.php) -- it's
the first one:
|It's important to note that subclasses of the Exception class will be
caught by the default Exception handler
Of course, I haven't tested the code they posted. I'll do that tonight
and confirm or deny the expected result.
James
|
Well look at that..
class James_Exception extends \Exception{
function __construct($message){
parent::__construct($message);
}
}
try{
throw new James_Exception('Testing Exception Catch-All');
}
catch(Exception $e){
print_r($e);
}
Output:
James_Exception Object
(
[message:protected] = Testing Exception Catch-All...
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Re: [PHP] Exception Handling
Maybe catch(Exception $e) should be catch(\Exception $e)? On Fri, Jun 1, 2012 at 5:25 PM, James Colannino crankycycl...@gmail.com wrote: Hey guys, Haven't posted in a long time... Happy Memorial Day! I have an issue with exception handling. I'm using a framework that throws a Database_Exception object. I was expecting catch (Exception $var) to be sufficient to catch this, but it doesn't. I have to do catch (Database_Exception $var) to make it work. I've been reading that Exception should be sufficient, since every exception object is a child class of Exception. Did this perhaps change in 5.4? I think it was working properly in 5.3, but I'm not sure. Any clarification would be greatly appreciated! James -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Exception Handling
Am 01.06.12 17:08, schrieb James Colannino:
Hey Marco,
Thanks for the reply! That was the first thing I checked.
class Database_Exception extends \FuelException {}
class Fuel_Exception extends \Exception {}
It's extending Exception, as expected. Also, can you throw classes
that don't extend Exception? It was always my understanding that
doing so would cause a fatal error.
Ah, I guess that is the problem. Your application framework uses namespaces.
I guess you should try
catch (\Exception $e)
instead of
catch (Exception $e)
:-)
James
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Dipl. Informatiker (FH), SAE Audio Engineer Diploma
Zend Certified Engineer PHP 5.3
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e-Mail: ma...@behnke.biz
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Re: [PHP] Exception Handling
On Fri, Jun 1, 2012 at 12:51 PM, Marco Behnke ma...@behnke.biz wrote: Ah, I guess that is the problem. Your application framework uses namespaces. I guess you should try catch (\Exception $e) instead of catch (Exception $e) :-) Ah, that was probably it. Will try it out tonight to confirm. Thanks! James
Re: [PHP] Re: php exception handling
cant http://us3.php.net/manual/en/function.set-exception-handler.php be used ?
?php
function exception_handler($e) {
//mail('to', 'exception', $e-getMessage());
}
set_exception_handler('exception_handler');
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[PHP] php exception handling
Hi, I am trying to make an exception class that emails the errors to myself. I have started by using the example by ask at nilpo dot com on http://dk2.php.net/manual/en/language.exceptions.php. It work ok but i want it NOT to show the errors on the php-page but only show the details in the email and then just write eg An error occurred or so on the webpage. Can anyone give me a hint about how to achieve this? Regards Lars Nielsen -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] php exception handling
- Original Message
From: Lars Nielsen l...@mit-web.dk
To: php-general@lists.php.net
Sent: Sun, October 11, 2009 2:18:03 PM
Subject: [PHP] php exception handling
Hi,
I am trying to make an exception class that emails the errors to myself.
I have started by using the example by ask at nilpo dot com on
http://dk2.php.net/manual/en/language.exceptions.php.
It work ok but i want it NOT to show the errors on the php-page but only
show the details in the email and then just write eg An error occurred
or so on the webpage. Can anyone give me a hint about how to achieve
this?
Regards
Lars Nielsen
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Lars,
Here's a pseudo code:
try {
if (!$valid) {
throw new Exception(Test failed.);
} else {
// do something
}
} catch (Exception $e) {
// set/print a user friendly message to send to output
// set a detailed message using debug_backtrace() or any other information
relevant for easier troubleshooting
// log and/or email detailed message
}
Regards,
Tommy
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Re: [PHP] php exception handling
On Sunday 11 October 2009 6:09:46 pm Tommy Pham wrote:
Lars,
Here's a pseudo code:
try {
if (!$valid) {
throw new Exception(Test failed.);
} else {
// do something
}
} catch (Exception $e) {
// set/print a user friendly message to send to output
// set a detailed message using debug_backtrace() or any other
information relevant for easier troubleshooting // log and/or email
detailed message
}
Regards,
Tommy
Actually the else clause is not necessary. That's one of the nice things
about exceptions. If you throw an exception, processing jumps to the
appropriate catch and never returns.
try {
// Do normal stuff.
if (!$valid) {
throw new Exception('OMG!');
}
// Do more normal stuff.
}
catch (Exception $e) {
// Print user friendly message.
// Log detailed information or whatever you're going to do.
}
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[PHP] Re: php exception handling
Lars Nielsen wrote:
Hi,
I am trying to make an exception class that emails the errors to myself.
I have started by using the example by ask at nilpo dot com on
http://dk2.php.net/manual/en/language.exceptions.php.
It work ok but i want it NOT to show the errors on the php-page but only
show the details in the email and then just write eg An error occurred
or so on the webpage. Can anyone give me a hint about how to achieve
this?
Regards
Lars Nielsen
Don't sell exception handling short; it can be very useful for processing
control. Here is an example of a sequence of user input validations and checks.
All check functions throw an exception, with the details, if they find an error.
e.g., Tag spen is invalid. Check spelling. This message is rendered so the
user can correct his/her mistake.
if(!empty($adminMiscSettingsArray['instrText']))
{
try{
checkValidTags($validHTMLtags,
allProxyTagsArray,adminMiscSettingsArray['instrText']);
checkTagMatching($emptyProxyTagsArray,$adminMiscSettingsArray['instrText']);
checkTagNesting($emptyProxyTagsArray, $adminMiscSettingsArray['instrText']);
checkTextLinks($linksProxyTagsArray, $adminMiscSettingsArray['instrText']);
}
catch (Exception $e){
$instrCheckErrorMsg = $e-getMessage();
}
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Re: [PHP] Exception handling with file()
On Mon, February 11, 2008 6:34 am, John Papas wrote:
I need to open a remote file with file() and I would like to put it
inside a try-catch but as far as I can tell file() does not raise an
exception if it fails. The following code:
try {
$data = file('http://myserver.com/myfile.txt');
$date = substr($data, 0);
} catch (Exception $e) {
$data = it failed;
}
echo $data;
echoes a warning:
Warning: file('http://myserver.com/myfile.txt') [function.file]:
failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found
in.
Old-school PHP functions do not (and will not) raise exceptions.
Use http://php.net/set_error_handler
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[PHP] Exception handling with file()
I need to open a remote file with file() and I would like to put it
inside a try-catch but as far as I can tell file() does not raise an
exception if it fails. The following code:
try {
$data = file('http://myserver.com/myfile.txt');
$date = substr($data, 0);
} catch (Exception $e) {
$data = it failed;
}
echo $data;
echoes a warning:
Warning: file('http://myserver.com/myfile.txt') [function.file]:
failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found
in.
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Re: [PHP] Exception handling with file()
2008. 02. 11, hétfő keltezéssel 14.34-kor John Papas ezt írta:
I need to open a remote file with file() and I would like to put it
inside a try-catch but as far as I can tell file() does not raise an
exception if it fails. The following code:
try {
$data = file('http://myserver.com/myfile.txt');
$data = @file('http://myserver.com/myfile.txt');
if ($data === FALSE) throw new Exception('whatever');
hope that helps
Zoltán Németh
$date = substr($data, 0);
} catch (Exception $e) {
$data = it failed;
}
echo $data;
echoes a warning:
Warning: file('http://myserver.com/myfile.txt') [function.file]:
failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found
in.
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Re: [PHP] Exception handling in PHP
On Wed, 2008-02-06 at 23:37 -0800, Prabath Kumarasinghe wrote: Does that mean for every exception do we have to write our custom exception and describe it from our own message No, it means that when you want to throw a meaningful exception, you need to type in a message. I mentioned custom exceptions, because that is what I do, as I multilingualise my messages and do other things with the exception, like display an XHTML page to the users. --Paul All Email originating from UWC is covered by disclaimer http://www.uwc.ac.za/portal/public/portal_services/disclaimer.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Exception handling in PHP
Understood, Thanks Paul Cheers Prabath --- Paul Scott [EMAIL PROTECTED] wrote: On Wed, 2008-02-06 at 23:37 -0800, Prabath Kumarasinghe wrote: Does that mean for every exception do we have to write our custom exception and describe it from our own message No, it means that when you want to throw a meaningful exception, you need to type in a message. I mentioned custom exceptions, because that is what I do, as I multilingualise my messages and do other things with the exception, like display an XHTML page to the users. --Paul All Email originating from UWC is covered by disclaimer http://www.uwc.ac.za/portal/public/portal_services/disclaimer.htm Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Exception handling in PHP
On Thu, 2008-02-07 at 00:20 -0800, Prabath Kumarasinghe wrote: Understood, Thanks Paul Pleasure, but please don't top post, it makes it really hard to follow a thread easily. Most people on this list take time out from their really busy day jobs to help out, and the more time that everyone can save them, the better. --Paul All Email originating from UWC is covered by disclaimer http://www.uwc.ac.za/portal/public/portal_services/disclaimer.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Exception handling in PHP
Does that mean for every exception do we have to write
our custom exception and describe it from our own
message
If you mean Do I have to write custom exception classes?, the no. You
could just use the PHP Exception class.
Eg.
class DBException extends Exception {}
try {
$connection = mysql_connect(...);
if (!$connection) {
throw new DBException('Failed to connect to database');
}
// Database exception handling code
} catch (DBException $e) {
// ...
// Generic Exception handling code (The Exception c
} catch Exception $e {
// ...
}
That's from memory, so there may be a few errors.
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Re: [PHP] Exception handling in PHP
// ...
That's from memory, so there may be a few errors.
Seems there was. Try this:
class DBException extends Exception {}
try {
$connection = mysql_connect(...);
if (!$connection) {
throw new DBException('Failed to connect to database');
}
// Database exception handling code
} catch (DBException $e) {
// ...
// Generic Exception handling code (The Exception class is
// built in to PHP)
} catch (Exception $e) {
// ...
}
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[PHP] Exception handling in PHP
Hi All
I'm little bit confusing with PHP exception handling.
Could you able to explain how to put try{} and
catch(){} in a proper way in PHP. I had already read
php exception manual but it didn't help me to get
exact idea about exception handling in php.
Cheers
Prabath
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Re: [PHP] Exception handling in PHP
On Wed, 2008-02-06 at 22:52 -0800, Prabath Kumarasinghe wrote:
Hi All
I'm little bit confusing with PHP exception handling.
Could you able to explain how to put try{} and
catch(){} in a proper way in PHP. I had already read
php exception manual but it didn't help me to get
exact idea about exception handling in php.
Well, its pretty simple really...
In your objects that you create, just put in a statement that throws an
exception of some sort (I like to extend the built in exception handler
with a custom one that deals properly with db errors as well as PHP
ones) and then try{} and catch(){} them in your business logic.
example:
class someclass {
public function foo()
{
// do something
...
else {
throw new Exception(uh-oh - we have a problem!);
}
}
}
$thing = new someclass;
try {
$thing-foo();
}
catch(Exception $e) {
echo $e-getMessage();
exit;
}
--Paul
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Re: [PHP] Exception handling in PHP
Hi Paul
Is this following code work in PHP if mysql_connect
fails.
try{
mysql_connect('localhost','user','');
}catch(Exception $e){
echo $e-getMessage();
}
Cheers
Prabath
--- Paul Scott [EMAIL PROTECTED] wrote:
On Wed, 2008-02-06 at 22:52 -0800, Prabath
Kumarasinghe wrote:
Hi All
I'm little bit confusing with PHP exception
handling.
Could you able to explain how to put try{} and
catch(){} in a proper way in PHP. I had already
read
php exception manual but it didn't help me to get
exact idea about exception handling in php.
Well, its pretty simple really...
In your objects that you create, just put in a
statement that throws an
exception of some sort (I like to extend the built
in exception handler
with a custom one that deals properly with db errors
as well as PHP
ones) and then try{} and catch(){} them in your
business logic.
example:
class someclass {
public function foo()
{
// do something
...
else {
throw new Exception(uh-oh - we have a
problem!);
}
}
}
$thing = new someclass;
try {
$thing-foo();
}
catch(Exception $e) {
echo $e-getMessage();
exit;
}
--Paul
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Re: [PHP] Exception handling in PHP
On Wed, 2008-02-06 at 23:10 -0800, Prabath Kumarasinghe wrote:
Is this following code work in PHP if mysql_connect
fails.
try{
mysql_connect('localhost','user','');
}catch(Exception $e){
echo $e-getMessage();
Probably not. I don't think that the mysql functions throw exceptions on
failure.
You will have to write a wrapper function to do the exception on
failure, so something like
function dbConnect()
{
$conn = mysql_connect('','','');
if(!$conn) {
throw new Exception(Couldn't connect);
}
else {
return $conn;
}
}
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Re: [PHP] Exception handling in PHP
Does that mean for every exception do we have to write
our custom exception and describe it from our own
message
Cheers
Prabath
--- Paul Scott [EMAIL PROTECTED] wrote:
On Wed, 2008-02-06 at 23:10 -0800, Prabath
Kumarasinghe wrote:
Is this following code work in PHP if
mysql_connect
fails.
try{
mysql_connect('localhost','user','');
}catch(Exception $e){
echo $e-getMessage();
Probably not. I don't think that the mysql functions
throw exceptions on
failure.
You will have to write a wrapper function to do the
exception on
failure, so something like
function dbConnect()
{
$conn = mysql_connect('','','');
if(!$conn) {
throw new Exception(Couldn't connect);
}
else {
return $conn;
}
}
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RE: [PHP] Exception Handling in php
I think that would be nice to have a try-catch to better control of the
code.
Ovidiu
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, February 27, 2001 9:09 PM
To: kevin1; [EMAIL PROTECTED]
Subject: Re: [PHP] Exception Handling in php
Addressed to: kevin1 [EMAIL PROTECTED]
[EMAIL PROTECTED]
** Reply to note from kevin1 [EMAIL PROTECTED] Tue, 27 Feb
2001 08:10:05 -0500
Is there any equivalent to Java's try-catch or Perl's eval{BLOCK}if($@)
structure in PHP?
No.
There has been some discussion about adding it on the developers list,
but I don't expect to see it any time soon.
Rick Widmer
Internet Marketing Specialists
http://www.developersdesk.com
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[PHP] Exception Handling in php
Is there any equivalent to Java's try-catch or Perl's eval{BLOCK}if($@)
structure in PHP?
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Re: [PHP] Exception Handling in php
Addressed to: kevin1 [EMAIL PROTECTED]
[EMAIL PROTECTED]
** Reply to note from kevin1 [EMAIL PROTECTED] Tue, 27 Feb 2001 08:10:05 -0500
Is there any equivalent to Java's try-catch or Perl's eval{BLOCK}if($@)
structure in PHP?
No.
There has been some discussion about adding it on the developers list,
but I don't expect to see it any time soon.
Rick Widmer
Internet Marketing Specialists
http://www.developersdesk.com
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[PHP] Exception handling
Hello, Is it impolite to ask about when approximately PHP will support Exception handling ? :) Thanks ! -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
