I'm building a php, javscript powered website and I want to include a powerful wysiwyg editor which can include images, code etc. If possible I want to implement the same one like stackoverflow. how can I do it??
You have to choose dependes on your requirement, and almost all the editors are having same/common features
personally i like TinyMce
if you want to see more editors see this link
Lucky you there is new lightweight implementation of wysiwyg editor out which uses contenteditable attribute and is compatible with different browser versions https://github.com/guardian/scribe. This solution is more customizable than the others.