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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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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For additional commands, e-mail: [EMAIL PROTECTED]
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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
--
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]
