Catch PHP error

Mantis · December 19th, 2004, 06:56 AM

Hi,

I posted this in HTML but looks like its a PHP issue.

I have an âissueâ with âcatching an errorâ
In Visual basic, I can write down: on error goto xyz

Is there something I can do to catch the error bellow and redirect it to a webpage?

>> PHP Warning: POST Content-Length of 440912205 bytes exceeds the limit of 57671680 bytes in Unknown on line 0

As always, thanks for any help you can offer...

Snib already answered in the HTML forum:

This is a PHP error.

You can detect PHP errors with try {} catch() {} I believe, check out http://www.php.net

I've looked on php.net and .. .. I can't find a thing in there! :(

Snib · December 20th, 2004, 02:41 PM

Sorry, my bad. I thought you were trying to catch an exception.

Try http://us2.php.net/set-error-handler

-Snib - http://www.snibworks.com
Where will you be in 100 years?

colin.horne · December 20th, 2004, 04:26 PM

Hi

Don't quote me on this, but I think this is apache preventing large files from being uploaded.

I don't have time to look into it just now, but look in php.ini and/or httpd.conf to see if you can find the configeration option for setting max upload filesizes (likely google keywords: "max file size upload php").

Cheers

(Edit note - first search result yeilded http://uk2.php.net/features.file-upload, which seems useful)

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Mantis · January 7th, 2005, 08:25 AM

Colin, that won't do it; the max file upload is 2 MB (host server-not mine). I want to redirect the error message from the server so the users don't get that nasty message but a nice webpage teelling them what I think.. ;)

richard.york · January 9th, 2005, 03:09 PM

Because this is an error stating that the lenth of POST content is exceeded, I don't think it is possible to "catch" this error. It is an error that happens *before* script processing begins, or at the very least is the first thing that happens when script processing does begin.

You can fake knowing about the error though. First, turn off error reporting. If you use Apache you can probably do this with a .htaccess configuration file. Then do normal validation in the script that processes the post data. If there is a lack of it (post data) then you know something went wrong with the submission and can alert the user to that affect, 1.) either nothing was submitted or 2.) too much was submitted.

If you're really determined to know when this particular error has been triggered, you can get into some nitty gritty error customization.

There are some functions outlined here:
http://www.php.net/manual/en/ref.errorfunc.php

Error handling can also be set as ini directives, which would be best in your case since the error in question is likely coming before runtime of your script.
http://www.php.net/ini_set

You need the ability to configure either httpd.conf or .htaccess of Apache to set ini directives without direct access to php.ini. As far as I know, this isn't possible with other HTTP servers.

HTH!

Regards,
Rich

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[http://www.smilingsouls.net]
Mail_IMAP: A PHP/C-Client/PEAR solution for webmail
Author: Beginning CSS: Cascading Style Sheets For Web Design

Mantis · January 10th, 2005, 11:48 AM

<-Shot himself in the head

Why is it always so complicated (...)

Mantis · January 10th, 2005, 12:13 PM

Ok.. 1st thank you for the reply.

I just checked the web and it looks easier than I first thought.
Can you show me an example on how to switch off error reporting?
Do I create a file called ".htaccess " ? I suppose we are speaking text file?

"normal validation in the script that processes the post data" now I know why you write books and I don't :)

Already have a bit of code checking if a problem occured when uploading / moving from temp to main directory.

I have a friend who's learning CSS; you must be a God for him ;) (http://tod.rsow.com/ that's one of his website.. won't have a clue if it's CSS or not to be honnest!)

Thanks for your help :)

richard.york · January 19th, 2005, 01:05 PM

Hi, sorry for the belated reply.

Here's what my .htaccess looks like:

Code:

AddType application/x-httpd-php .html

php_value register_globals 0
php_value error_reporting 0
php_flag expose_php off
php_value session.gc_probability 75
php_value arg_separator.output &amp;
php_value arg_separator.input &;
php_value session.use_trans_sid off

php_value highlight.bg #ffffff
php_value highlight.comment #ff9900
php_value highlight.default #0000cc
php_value highlight.html #000000
php_value highlight.keyword #006600
php_value highlight.string #cc0000

Just some random configurations there.

If you're using Windows, you'll have to enclose the file name ".htaccess" in quotations while saving it. .htaccess configurations are also inherited to subdirectories, so if you place this in your top-level directory, scripts in the subdirectories should inherit the same configurations. (Assuming Apache was configured that way).

You can verify that the configurations have taken affect by running a phpinfo(); script in the same directory as the configuration file, .htaccess directives will appear under "Local value".

HTH!

Regards,
Rich

--
[http://www.smilingsouls.net]
Mail_IMAP: A PHP/C-Client/PEAR solution for webmail
Author: Beginning CSS: Cascading Style Sheets For Web Design