An important part of learning any new piece of software is understanding the terminology it uses. Thankfully WordPress uses fairly simple names for everything that make it easy to start using the software.
Course Of The Month
Become a Premium Member and unlock a new, free course in leading technologies each month.
Solved
Recomendations for troubleshooting
Posted on 2007-11-26
Recently, I have run into scripts that would not run using PHP and Ajax methodology. Most of the scripts seem to fail silently for whatever reason. I do not get an error in the firebug, apache or php error logs. My question is how can I trouble shoot silent failing scripts? Can anyone recommend any help?
[X]
Welcome to Experts Exchange
Add your voice to the tech community where 5M+ people just like you are talking about what matters.
- Help others & share knowledge
- Earn cash & points
- Learn & ask questions
3-
3
7 Comments
Put echo statements into the script at various places, to see where it fails.
echo "Step 1 got to here<br>";
echo "Step 2 got to here<br>";
and then run them. As you see which echo statements are executed, you can narrow down the problem.
Another thing to do is take out any @'s on mysql statements. They block the error message from showing.
echo "Step 1 got to here<br>";
echo "Step 2 got to here<br>";
and then run them. As you see which echo statements are executed, you can narrow down the problem.
Another thing to do is take out any @'s on mysql statements. They block the error message from showing.
Also it is good practice to echo out any variables which are returned from elsewhere, just to make sure that it actually returns something.
If you still cannot debug your script, an option may be to write a similar but much simpler version of your script and narrow down on exactly what the problem is.
If you still cannot debug your script, an option may be to write a similar but much simpler version of your script and narrow down on exactly what the problem is.
Mostly it revolves around verifying that the server's response to an XMLHTTPRequest is what you think it is. Firebug has a feature to display these response packets, but I often run the queries directly, either in a browser or from the command line. Doing it in a browser tends to work best when the response is something the browser knows how to display. If you need to test a POST request, a command line tool like curl or wget will probably be easier.
Thank you for the points, but could you tell me for future reference, what else should I have said/done to rate a grade of A?
Well, I did not give you an "A" simply because it was a rather basic responses. Not to say, you were completely off topic but I was looking for something a little more geared towards the topic of Ajax and PHP. Perhaps, it was the question. Next time I will be more specific.
FYI - The comment that I left, was some information my coworker provided me, which I felt was a little more towards Ajax.
FYI - The comment that I left, was some information my coworker provided me, which I felt was a little more towards Ajax.
OK, thanks for the reply. May I suggest in the future, you give a little more indication of your level of expertise or answer you are looking for. We get a lot of very "basic" questions on here, and when the questioner sounds like someone who doesn't know where to start, "basic" answers are often best. You did describe yourself as "Beginner on this subject". :)
Cheers.
Cheers.
Featured Post
Benefit from a mission critical IT monitoring with Monitis Premium or get it FREE for your entry level monitoring needs.
-Over 200,000 users
-More than 300,000 websites monitored
-Used in 197 countries
-Recommended by 98% of users
Question has a verified solution.
If you are experiencing a similar issue, please ask a related question
Introduction
This article is intended for those who are new to PHP error handling (https://www.experts-exchange.com/articles/11769/And-by-the-way-I-am-New-to-PHP.html). It addresses one of the most common problems that plague beginning PHP develop…
Originally, this post was published on Monitis Blog, you can check it
here
.
In business circles, we sometimes hear that today is the “age of the customer.” And so it is. Thanks to the enormous advances over the past few years in consumer techno…
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
The viewer will learn how to create and use a small PHP class to apply a watermark to an image. This video shows the viewer the setup for the PHP watermark as well as important coding language. Continue to Part 2 to learn the core code used in creat…
Suggested Courses
Earn Certification
HTML5 Specialist - Certification
Free withPremium
Course of the Month5 days, 19 hours left to enroll
627 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.