Comments on: Themed Error Pages http://hackademix.net/2007/07/31/themed-error-pages/ Giorgio Maone's answers to the Web, the Universe, and Everything Fri, 29 Aug 2008 07:21:21 +0000 http://wordpress.org/?v=2.2.3 By: richard http://hackademix.net/2007/07/31/themed-error-pages/#comment-8553 richard Mon, 07 Jul 2008 02:06:38 +0000 http://hackademix.net/2007/07/31/themed-error-pages/#comment-8553 nice...very new to da whole net thing, me do mostly hardware, custom built. with os and the most common software that is currently used. just got ADSL and paying hefty price to but me try to cheat my sp cause they only allow 4gb...!!!what the @#$#!! 4gbis wat i do in 2 hours.....so i do google search for south african software brains. end no one to date. so me now no sleep and me try to get around this whole new world that is very very faccinating....i just cant close my eyes...and have little help with substance:) but substance make net for exciting...is me mad!! nice…very new to da whole net thing, me do mostly hardware, custom built. with os and the most common software that is currently used. just got ADSL and paying hefty price to but me try to cheat my sp cause they only allow 4gb…!!!what the @#$#!! 4gbis wat i do in 2 hours…..so i do google search for south african software brains. end no one to date. so me now no sleep and me try to get around this whole new world that is very very faccinating….i just cant close my eyes…and have little help with substance:) but substance make net for exciting…is me mad!!

]]> By: Andy http://hackademix.net/2007/07/31/themed-error-pages/#comment-200 Andy Thu, 16 Aug 2007 10:41:40 +0000 http://hackademix.net/2007/07/31/themed-error-pages/#comment-200 Mate, I thank you! A lot! Andy Mate,
I thank you! A lot!
Andy

]]> By: Giorgio http://hackademix.net/2007/07/31/themed-error-pages/#comment-190 Giorgio Tue, 14 Aug 2007 16:31:29 +0000 http://hackademix.net/2007/07/31/themed-error-pages/#comment-190 Hi Andy, I guess your problem is best handled using JavaScript client side validation. My hack intercepts any error message produced by WordPress, included the server side validation for comments. If you want your error messages to popup <em>before</em> the data is submitted, you can add a JavaScript <code>onsubmit</code> event handler to check the fields and <code>alert()</code> the feedback. Many themes (e.g. K2) already feature such a goodie out of the box. Hope it helps. Hi Andy,

I guess your problem is best handled using JavaScript client side validation.
My hack intercepts any error message produced by WordPress, included the server side validation for comments.
If you want your error messages to popup before the data is submitted, you can add a JavaScript onsubmit event handler to check the fields and alert() the feedback.
Many themes (e.g. K2) already feature such a goodie out of the box.

Hope it helps.

]]> By: andy http://hackademix.net/2007/07/31/themed-error-pages/#comment-187 andy Tue, 14 Aug 2007 11:20:18 +0000 http://hackademix.net/2007/07/31/themed-error-pages/#comment-187 Hi Giorgio, So a little off subject. I have created a popup window to deal with "add comments" on my blog. When the user doesn't include their name or write any comments, i have a custom error page that replaces the content in the popup with a custom message i have written. So the hack you provided really just allows this error page to be called. My concern is that if there are any other errors encountered this same error window will appear with my custom message, which will probably not relate to the error encountered. Now this can be easily solved by including $message in the body of the page like you recommend. But usually these error messages are pretty cryptic. Does wordpress have a list of error messages and under what circumstances they are likely to be encountered? Alternatively, how would you create a small window (like those error messages that the windows environment produces) that would popup to say "please enter name" Then i wouldn't need to customize an error page specifically for missing data. cheers Andy Hi Giorgio,

So a little off subject.
I have created a popup window to deal with “add comments” on my blog. When the user doesn’t include their name or write any comments, i have a custom error page that replaces the content in the popup with a custom message i have written. So the hack you provided really just allows this error page to be called.

My concern is that if there are any other errors encountered this same error window will appear with my custom message, which will probably not relate to the error encountered. Now this can be easily solved by including $message in the body of the page like you recommend. But usually these error messages are pretty cryptic.
Does wordpress have a list of error messages and under what circumstances they are likely to be encountered?

Alternatively, how would you create a small window (like those error messages that the windows environment produces) that would popup to say “please enter name”
Then i wouldn’t need to customize an error page specifically for missing data.

cheers
Andy

]]> By: Giorgio http://hackademix.net/2007/07/31/themed-error-pages/#comment-125 Giorgio Fri, 10 Aug 2007 14:56:20 +0000 http://hackademix.net/2007/07/31/themed-error-pages/#comment-125 The <code>wp_die()</code> function is called by WordPress every time a fatal error happen. Unluckily, WordPress has a quite broad concept of "fatal", including stuff like comments omitting a mandatory field. It's not nice giving feedback about ordinary events like that on a naked white page. Hence the need for themed error pages. The wp_die() function is called by WordPress every time a fatal error happen.
Unluckily, WordPress has a quite broad concept of “fatal”, including stuff like comments omitting a mandatory field.
It’s not nice giving feedback about ordinary events like that on a naked white page.
Hence the need for themed error pages.

]]> By: Andy http://hackademix.net/2007/07/31/themed-error-pages/#comment-124 Andy Fri, 10 Aug 2007 14:38:46 +0000 http://hackademix.net/2007/07/31/themed-error-pages/#comment-124 Thanks Giorgio, I get it! So i if i dont include the '<--ERROR_MESSAGE-->' in the body of my custom page ( which i haven't) then the string replace is just ignored and the message stored in $message is lost. I am sure this is bad practice though. So when else is the <code>wp_die()</code> function be called? cheers andy Thanks Giorgio,
I get it!
So i if i dont include the ‘<--ERROR_MESSAGE-->’ in the body of my custom page ( which i haven’t) then the string replace is just ignored and the message stored in $message is lost. I am sure this is bad practice though.

So when else is the wp_die() function be called?

cheers
andy

]]> By: Giorgio http://hackademix.net/2007/07/31/themed-error-pages/#comment-15 Giorgio Tue, 07 Aug 2007 17:21:38 +0000 http://hackademix.net/2007/07/31/themed-error-pages/#comment-15 Andy, my <code>die(str_replace('<--ERROR_MESSAGE-->', $message, file_get_contents(get_option('siteurl') . '/error')));</code> statement works this way: <ol> <li><code>file_get_contents(...)</code> fetches the content of page located at <code>get_option('siteurl') . '/error'</code> or wherever you replaced '/error' with.</li> <li><code>str_replace(...)</code> replaces the "<code><--ERROR_MESSAGE--></code>" string you should have put in the body of your custom page with the actual error message (<code>$message</code>)</li> <li><code>die(...)</code> exits the scripts immediately after printing out the string prepared above.</li> </ol> Andy, my die(str_replace('<--ERROR_MESSAGE-->', $message, file_get_contents(get_option('siteurl') . '/error'))); statement works this way:

  1. file_get_contents(...) fetches the content of page located at get_option('siteurl') . '/error' or wherever you replaced ‘/error’ with.
  2. str_replace(...) replaces the “<--ERROR_MESSAGE-->” string you should have put in the body of your custom page with the actual error message ($message)
  3. die(...) exits the scripts immediately after printing out the string prepared above.
]]> By: Andy http://hackademix.net/2007/07/31/themed-error-pages/#comment-14 Andy Tue, 07 Aug 2007 17:07:10 +0000 http://hackademix.net/2007/07/31/themed-error-pages/#comment-14 Thanks Giorgio, So the problem seemed to be step one. Creating the page in wordpress. Not sure why? So I ended up creating my own error page in the theme editor, added it to my theme directory, then changed the path from '/error' to '/wp-content/themes/.../error.php' in the functions.php file. And it worked great! Not sure what i was doing wrong. I have another question. What does the first argument refer to in the wp_die function? in particular this part : <code>die(str_replace('<--ERROR_MESSAGE-->', $message,</code> As i don't have the page created as you recommend in step one what does the now refer to? cheers Thanks Giorgio,

So the problem seemed to be step one. Creating the page in wordpress. Not sure why?

So I ended up creating my own error page in the theme editor, added it to my theme directory, then changed the path from ‘/error’ to ‘/wp-content/themes/…/error.php’ in the functions.php file.
And it worked great!

Not sure what i was doing wrong.

I have another question. What does the first argument refer to in the wp_die function?
in particular this part : die(str_replace('<--ERROR_MESSAGE-->', $message,

As i don’t have the page created as you recommend in step one what does the now refer to?

cheers

]]> By: Giorgio http://hackademix.net/2007/07/31/themed-error-pages/#comment-12 Giorgio Tue, 07 Aug 2007 13:49:27 +0000 http://hackademix.net/2007/07/31/themed-error-pages/#comment-12 Hi Andy, Could you please send me both your <code>page.php</code> and the <code>wp-includes/functions.php</code> you modified? Does this problem happen with other pages as well? This issue may depend on your url-rewriting options. If they're not set to display your new made "Error" page as <code>http://your.home.page<b>/error</b></code>, this trick won't work. You'll need to adjust the <code>file_get_contents(get_option('siteurl') . '<b>/error</b>')</code> statement to match the correct URL for your "Error" page. Good luck and let me know. Hi Andy,
Could you please send me both your page.php and the wp-includes/functions.php you modified?
Does this problem happen with other pages as well?

This issue may depend on your url-rewriting options.
If they’re not set to display your new made “Error” page as http://your.home.page/error, this trick won’t work.
You’ll need to adjust the file_get_contents(get_option('siteurl') . '/error') statement to match the correct URL for your “Error” page.
Good luck and let me know.

]]> By: Andy http://hackademix.net/2007/07/31/themed-error-pages/#comment-9 Andy Tue, 07 Aug 2007 11:37:34 +0000 http://hackademix.net/2007/07/31/themed-error-pages/#comment-9 Hi, Can't seem to get this to work. I am using WP 2.2 I followed your instructions but when i type in mydomain.com/blog/error i get the following error Parse error: syntax error, unexpected '?' in /home/../public_html/blog/wp-content/themes/bello/page.php on line 16 But i dont see anything in page.php that is erroneous. What do you think is happening? thanks Hi,
Can’t seem to get this to work. I am using WP 2.2
I followed your instructions but when i type in mydomain.com/blog/error i get the following error
Parse error: syntax error, unexpected ‘?’ in /home/../public_html/blog/wp-content/themes/bello/page.php on line 16

But i dont see anything in page.php that is erroneous.

What do you think is happening? thanks

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