The NetBeansIDE7.1forPHP function is invalid.

The NetBeansIDE7.1forPHP function prompts that it is invalid! Enter a letter and no function prompt is displayed, just as this function does not exist. There are red wavy lines under the letter. Reinstallation is not acceptable. what's the problem? Class: The same is true ., I have never used this ide. it is quite difficult to use it. I still use the p NetBeans IDE 7.1 for PHP function to prompt that it is invalid!
Enter a letter and no function prompt is displayed, just as this function does not exist. There are red wavy lines under the letter. Reinstallation is not acceptable. what's the problem?
Class.

------ Solution --------------------
I have never used this ide, but it is still difficult to use it. use phpstorm... believe it, I don't regret it.

In addition, if you want to use it, you must delete all the original configuration documents for reinstallation.
------ Solution --------------------
File settings editor color & fonts font-> size