NotePad ++正则表达式和替换

Question

How can i replace

$lang['abc'] with lang('abc')

and

{$lang['abc']} with ".lang('abc')."

including quotes.

Where i am stuck is how RegExp can save 'abc' to be used in replaced text

Answer 1

First one (tested in N++):

Search: \\$lang\\['(abc)'\\]

Replace: lang\\('$1'\\)

Second one (also tested in N++):

Search: \\{\\$lang\\['(abc)'\\]\\}

Replace: ".lang\\('$1'\\)."

The back reference mentioned by devnull is the content of the (abc) parentheses. The parentheses capture abc into Group 1. That content is referred to in the replacement as "$1". You may like to read all about regex capture .