Currently I am using this plugin (example at the end of page)
http://api.jqueryui.com/autocomplete/
If I type “p”, then “php” come out.
How can I modify the plug-in so that if I type SPACE or “,” and then type “c”, then c++ will come out? Therefore, what I can have in the textbox is “php, c++”
why you need “SPACE” or “,” when jquery autocomplete multiple does evrything for you.. check this out
you can have a look to jquery autocomplete multiple example.. here is the link
you can click view source link in the example and check it out how they have done..