Copy/Paste Detector (CPD) for PHP code.
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README.md

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PHP Copy/Paste Detector (PHPCPD)

phpcpd is a Copy/Paste Detector (CPD) for PHP code.

Installation

PHP Archive (PHAR)

The easiest way to obtain PHPCPD is to download a PHP Archive (PHAR) that has all required dependencies of PHPCPD bundled in a single file:

$ wget https://phar.phpunit.de/phpcpd.phar
$ chmod +x phpcpd.phar
$ mv phpcpd.phar /usr/local/bin/phpcpd

You can also immediately use the PHAR after you have downloaded it, of course:

$ wget https://phar.phpunit.de/phpcpd.phar
$ php phpcpd.phar

Composer

You can add this tool as a local, per-project, development-time dependency to your project using Composer:

$ composer require --dev sebastian/phpcpd

You can then invoke it using the vendor/bin/phpcpd executable.

Usage Example

$ phpcpd --fuzzy wordpress-4.9.8
phpcpd 4.1.0 by Sebastian Bergmann.

Found 66 clones with 3014 duplicated lines in 40 files:

  - /home/sb/wordpress-4.9.8/wp-includes/Requests/IRI.php:358-708 (350 lines)
    /home/sb/wordpress-4.9.8/wp-includes/SimplePie/IRI.php:404-754
.
.
.
  - /home/sb/wordpress-4.9.8/wp-includes/SimplePie/File.php:133-144 (11 lines)
    /home/sb/wordpress-4.9.8/wp-includes/SimplePie/File.php:215-226

0.86% duplicated lines out of 349460 total lines of code.
Average size of duplication is 45 lines, largest clone has 350 of lines

Time: 1.79 seconds, Memory: 272.00MB