How to enable autocomplete/syntax-highlight for PHP core functions in Eclipse?

Question

I searched a lot, checked many times the neccesary steps, but it still don't work.

My environment is :

1. Latest eclipse for PHP developer package

2. Project is newed, not check out directly from SVN

3. .project has a line

   <nature>org.eclipse.php.core.PHPNature</nature>
   

4. .buildpath has a line

   <buildpathentry kind="con" path="org.eclipse.php.core.LANGUAGE"/>
   

5. .settings/org.eclipse.core.resources.prefs has a line

   include_path=0;/projectname
   

6. file ensured opened in PHP Editor

Something works:

1. PHP core function defination displayed when mouse over, and Ctrl+Click will open its defined file, but input 'arr' nothing happens, while a list of array functions expected
2. Autocomplete does work for internal functios/variables such as class members But never works for PHP core functions, neither syntax highlighting

Answer 1

Right-Click on your project -> Configure -> Add PHP Support...

Works for me on Eclipse 3.5 / PDT 2.1

Answer 2

For me, nothing worked, except:

1. Backup and then delete the .db files under: /.metadata/.plugins/org.eclipse.dltk.core.index.sql.h2/
2. Restart eclipse.

I got this tip from #4 in: http://www.nwiresoftware.com/blogs/nwire/2010/09/five-tips-speeding-eclipse-pdt-and-nwire

Answer 3

As noted before the 'natures' node for php core is listed but this is most insufficient when the project is imported or checked out.

• Make a backup of your .project
• Remove the 'natures' node children
• Close/Re-open eclipse
• Right-click project -> Configure -> Add PHP Support
• Add back other 'natures' children

The issue is that project will not make the necessary imports because it assumes it already has.