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Web Development School
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Quick Table of Contents
Php Debugging Tips
  • Be patient and read all error messages carefully. The description often
  • explains what the issue is and suggests what can be done to fix it.
  • When dealing with syntax errors, check the line above the one specified
  • in the error message. Look for misspellings and extra or missing parenthesis, braces, semicolons, etc.
  • Indent your code to improve readability, and use a code editor with
  • syntax highlighting.
  • If your code is giving you unexpected results, you probably have a logic issue.
  • Go through your code line by line checking for logic errors. These sort of errors can be the toughest to catch because you won’t receive any error messages.
  • Use echo and print_r() to check the values of your variables at various points
  • in your code.
  • Use die() to halt you program’s execution at specific points in your code. (This
  • is best used with a combination of echo or print_r() functions.)
  • Do a web search. Others may have run into the same issue you are encountering
  • and may have posted the solution.
  • Have someone else look at your code. Staring at your own code for too long may
  • mean you miss obvious issues. If you don’t have anyone who knows PHP nearby, consider posting your code on a web forum.