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Changes in PHPCPD

All notable changes in PHPCPD are documented in this file using the Keep a CHANGELOG principles.

[9.0.0] - 2026-03-08

Updated

  • Updated the minimum PHP requirement to version 8.4, meaning this tool is no longer supported on PHP 8.3.
  • Updated the Suffix Tree engine to use PHP native arrays, completely eliminating hash collisions, achieving zero memory bloat, and boosting performance by up to 17%.
  • Updated the PMD-CPD XML report generator to use the modern Dom\XMLDocument extension.
  • Updated Composer dependencies and improved the development environment for the support team.

[8.3.0] - 2026-02-16

Added

  • Added --ignore-no-files option to return a success exit code if no files were found.
  • Added #[SuppressCpd] to ignore code clones inside a class or method (use Systemsdk\PhpCPD\Attributes\SuppressCpd;).

Updated

  • Improved Suffix Tree-based algorithm for code clone detection.
  • Updated Dev environment: Updated XDebug, Phing, dev composer dependencies.

[8.2.4] - 2025-11-08

Updated

  • Updated sebastian/cli-parser. Dev environment: Updated XDebug, Phive, Phing, dev composer dependencies.

[8.2.3] - 2025-05-25

Updated

  • Improved html report and DataTables buttons, updated bootstrap and DataTables to the latest version.

[8.2.2] - 2025-05-18

Updated

  • Improved progress bar.

[8.2.1] - 2025-05-03

Updated

  • Fixed codefragment value for xml report.

[8.2.0] - 2025-05-01

Added

  • Added possibility to use xalan cli tool for generating html report with datatable and possibility to export into csv, excel, pdf formats or print it.

Updated

  • Changed and extended xml report format.

[8.1.1] - 2025-04-13

Added

  • Tool can be installed using composer, updated composer dependencies.

[8.1.0] - 2025-03-23

Added

  • Added Suffix Tree-based algorithm for code clone detection (experimental), added progress bar.

Updated

  • Made codebase refactoring. Updated packages: sebastian/cli-parser, sebastian/version, phpunit/php-file-iterator, phpunit/php-timer. Updated tests to the PHPUnit 12.

[8.0.0] - 2024-12-30

Updated

  • Made codebase refactoring. Updated requirements php 8.3, updated composer dependencies, updated tests to the PHPUnit 11. Updated dev environment to the php 8.4, Phing 3.0, added code quality tools: ecs, phpstan.

7.0.1 - 2024-01-12

Added

  • Skip php attributes from analysis (including multilines attributes, see example inside tests/fixture/Math.php)

7.0.0 - 2022-MM-DD

Added

  • #199: Suffix Tree-based algorithm for code clone detection

Removed

  • Removed support for PHP versions older than PHP 8.1

6.0.3 - 2020-12-07

Changed

  • Changed PHP version constraint in composer.json from ^7.3 to >=7.3

6.0.2 - 2020-08-18

Fixed

  • #187: Exclude arguments are being handled as prefixes

6.0.1 - 2020-08-13

Fixed

  • The --verbose CLI option had no effect

6.0.0 - 2020-08-13

Removed

  • The --names CLI option has been removed; use the --suffix CLI option instead
  • The --names-exclude CLI option has been removed; use the --exclude CLI option instead
  • The --regexps-exclude CLI option has been removed
  • The --progress CLI option has been removed

5.0.2 - 2020-02-22

Changed

  • Require sebastian/version version 3 and phpunit/php-timer version 3 to allow Composer-based installation alongside phploc/phploc version 6 and phpunit/phpunit version 9

5.0.1 - 2020-02-20

Fixed

  • #181: --min-lines, --min-tokens, and --fuzzy commandline options do not work

5.0.0 - 2020-02-20

Removed

  • Removed support for PHP versions older than PHP 7.3

4.1.0 - 2018-09-17

Added

  • Implemented #117: Report average and maximum length of code clone

Changed

  • The text logger now prints code clones sorted by size (in descending order)

4.0.0 - 2018-01-02

Removed

  • Removed support for PHP versions older than PHP 7.1

3.0.1 - 2017-11-16

Fixed

  • #147: Wrong exit code when no files were found to be scanned
  • #152: Version requirement for sebastian/version is too strict

3.0.0 - 2017-02-05

Added

  • #90: The PMD logger now replaces all characters that are invalid XML with U+FFFD
  • #100: Added the --regexps-exclude option

Changed

  • When the Xdebug extension is loaded, PHPCPD disables as much of Xdebug's functionality as possible to minimize the performance impact

Removed

  • Removed support for PHP versions older than PHP 5.6