Hi Ravi,
 > I have Arachnophilia(IDE) and i can write php script using it.Is it 
necessary to install ZendStudio-7.0.0-BETA(IDE) to write php script?

My two cents to your question:

It just depends on your programming experience with PHP, the complexity 
of the project(s) you work on, the necessity of debugging possibilities, 
the abstraction grade of your project (i.e. if you are using OOP with 
the use of classes, interfaces, abstraction, inheritance) and some more 
factors.

This would be my suggested approach:

* if you are used to use PHP and are skilled, things like notepad, 
notepad++, PSPad and the like are enough for smaller projects. They are 
quickly installed, don't need project setups, but miss most of the real 
IDE's functions.
* if you are skilled and use PHP on a higher level with bigger projects, 
I would suggest using Zend Studio (or the also eclipse-based PDT, which 
is not commercial). Both provide good tools to organize and document 
code, have auto-completion for classes, functions, variables; they 
support remote debugging on debuggable servers with xdebug or Zend 
debugger on the server side; and a lot more
* if you are not used to PHP and you mainly have to take care of design, 
some commercial WYSIWYG tools like Dreamweaver would be better, because 
they include complete script packages (i.e. user authentication, 
recordset pagination and so on) - this approach would be more 
frontend-oriented, because they are based on visual components.

Give us some more info on your background and experience for a better 
suggestion.

Regards,

Sascha

Richard Quadling schrieb:
> 2009/7/2 Ravi Joshi <ravi.joshi53@yahoo.com>:
>> Hi,
>>                I have Arachnophilia(IDE) and i can write php script using it.Is it necessary to install ZendStudio-7.0.0-BETA(IDE) to write php script?
>>
>> -Ravi Joshi
>>
>>
>>
>>
> 
> Depending upon your requirements.
> 
> I use an old fashioned text editor with colour syntax highlighting for
> PHP (EditPadPro - http://www.editpadpro.com)
> 
> If you are looking for an integrated debugging environment, then maybe
> Zend is your bag.
>