Perl

• wikiversity perl

From http://0x2121.com/7/Lost_in_Translation

Development tools

• Integrated Development Environment - IDE - for Perl

Regular expressions

• Regular Expression Perl Mainpage

One liners

• See Regular Expression Perl/Oneliners

Search and replace in files

You could also use find and sed.

perl -pi -w -e 's/SEARCH/REPLACE/g;' *.php

• e means execute the following line of code.
• i means edit in-place
• w write warnings
• p loop