Identifying PHP unused variables

Question

I have seen the below question and was wondering if there is something like it for Eclipse .

Also, how can I make sure that this kind of errors gets thrown into my trigger error function, so that I can write it to a log.

How can I identify PHP unused variables (in Emacs)?

Answer 1

Not sure it can report unused variables, but PHP_CodeSniffe r is nice when it comes to detecting problems in PHP source code.

Still, it's a command-line tool, and it's not integrated in Eclipse PDT...

As a sidenote :

• Unused variables (ie variables than get assigned a value, and are never used again) are not a problem in PHP -- so, they are not reported as error nor anything by PHP itself
• On the other hand, undeclared variables (ie variables that are being read from, while no value was assigned to them before) are not that good -- so, they are reported a notices by the PHP engine.

The post you are linking to is talking about the second kind, and not the first one.

To get undeclared/uninitialized variables reported by the PHP engine :

• You have to enable error_reporting , and configure it so it report E_NOTICE
• You can then have those reports either :
  • displayed in the generated page (nice when developping) : display_errors
  • or logged in a file : log_errors

But, here too, this is not integrated in Eclipse -- and I've never seen a tool that would parse the PHP error log, and push the notices to Eclipse...

Answer 2

Have you tried PMD Eclipse yet? According to my colleagues it is a pretty handy tool.

Answer 3

Netbeans IDE（我上个月从eclipse pdt换了）识别并显示有关未使用和未初始化的方法，变量等的警告。

Answer 4

You may be interessed in http://qualityassuranceinphpprojects.com/pages/tools.html that deals with testing/QA/CI/... and many other topics. PMD, PHP_CodeSniffer that have already been mentioned are as well in there as are many others

Answer 5

Install 'PDT Extensions' from here http://p2.pdt-extensions.org/

From the Eclipse(PDT) main menu select Help\\Install New Software
Then enter the above URL in the 'Work with' edit box. Click 'Add'. Check the 'PDT Extensions' checkbox. Click 'Next'...