Editing PHP files is only a matter of editing text but there are other options available which offer more features than your typical Windows notepad (or Linux nano/pico/vi).
These programs offer some additional functionality over and above text editing while making coding PHP a little easier on the eyes, and sometimes the brain!
A free and portable editor compatible with PHP, HTML/CSS and JavaScript.
CodeLobster PHP Edition can edit PHP files and edit HTML documents.
Web development suite of utilities for building web applications with support for popular languages like HTML, CSS, JavaScript, Python, Ruby and PHP.
Aptana Studio can edit PHP files and edit HTML documents.
A popular and feature-packed FTP client with a straight-forward interface.
CuteFTP can backup to FTP, edit PHP files and edit HTML documents.
Fast and commercial FTP client application which supports all of the common standards, sporting a clean and intuitive user inteface.
WS-FTP Pro can connect to sFTP servers, backup to FTP and edit PHP files.
Comfortable and powerful tool for writing and testing PHP scripts and HTML pages.
DzSoft PHP Editor can edit PHP files, edit HTML documents and highlight syntax.
A lightweight Windows text editor that fully supports Unicode and large files.
EmEditor can edit PHP files, edit HTML documents and highlight syntax.
Powerful FTP and FXP client which can transfer files in high speed with site-to-site and site-to-user options.
FlashFXP can connect to sFTP servers, backup to FTP, edit PHP files and edit HTML documents.
An open source editor for plain text and suitable replacement for Notepad.
AkelPad can edit PHP files, edit HTML documents and highlight syntax.
A feature-rich notepad and source editor for TXT and RTF.
RichEdit can open DOC and DOCX files and edit PHP files.
e is a fast & elegant collaborative text editor for Windows.
e can edit PHP files, edit HTML documents and highlight syntax.
A freeware text editor and potential Notepad.exe replacement.
Notepad2 can edit PHP files, edit HTML documents and highlight syntax.
Advanced editing and notepad replacement which includes syntax highlighting and support for a number of programming languages including HTML, PHP, Perl,...
GridinSoft Notepad can open LaTeX documents, edit LaTeX documents, edit PHP files and highlight syntax.
TxtEdit is an editor for text or Rich text files.
TxtEdit can edit PHP files and edit HTML documents.
Free and lightweight text editor application with an easy interface and support for programming languages and HTML.
Text Hawk Text Editor can edit PHP files, edit HTML documents and highlight syntax.
General purpose text editor useful for web developing, programming and scripting.
evolvEd can edit PHP files and edit HTML documents.