phpcpd

finds duplicate code in PHP projects

TLDR

Find duplicate code

$ phpcpd [src/]

Set minimum lines

$ phpcpd --min-lines [10] [src/]

Set minimum tokens

$ phpcpd --min-tokens [50] [src/]

Exclude directory

$ phpcpd --exclude [vendor] [src/]

Output to file

$ phpcpd --log-pmd [report.xml] [src/]

Check multiple directories

$ phpcpd [src/] [lib/]

Fuzzy matching

$ phpcpd --fuzzy [src/]

SYNOPSIS

phpcpd [--min-lines n] [--min-tokens n] [--exclude dir] [options] directories

phpcpd (PHP Copy/Paste Detector) finds duplicate code in PHP projects. It identifies code that should be refactored.
Token-based analysis finds similar code blocks. Renaming variables doesn't hide duplications.
Thresholds control sensitivity. Higher minimums find larger, more significant duplications.
Fuzzy matching finds near-duplicates. Code with minor differences is also detected.
Reports show file locations and duplicated content. Integration with CI tools enables automated checks.

PARAMETERS

--min-lines N

Minimum lines for duplication.

--min-tokens N

Minimum tokens for duplication.

--exclude DIR

Exclude directory.

--log-pmd FILE

PMD-CPD XML format.

--fuzzy

Fuzzy matching.

--suffix EXT

File suffix to check.

-v, --verbose

Verbose output.

--help

Show help.

CAVEATS

Similar but intentionally different code may be flagged. Very large codebases may be slow. Maintained as archived project.

HISTORY

phpcpd was created by Sebastian Bergmann as part of the PHP QA toolset. It helps maintain code quality by detecting copy-pasted code blocks.