Perl Script

How to do a search and replace over multiple files:

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

Example I had the following style sheet in a section:
<link rel="stylesheet" type="text/css" href="../includes/style.css">

and I wanted the following instead:
<link rel="stylesheet" type="text/css" href="admin.css">

As each expression is a regular expression you've got to escape the special characters such as forward slash and .

So the final line of code ends up as

perl -pi -w -e 's/\.\.\/includes\/style\.css/admin\.css/g;' *.php
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