Luciano Pereira

Token-Based Clone Detection for PHP: An Empirical Evaluation of Methods and a Labelled Benchmark

2026 · Zenodo (CERN European Organization for Nuclear Research)

phpcpd is a widely used PHP copy/paste (clone) detector whose last released version (6.0.3, 2020) performs Rabin–Karp exact matching of Type-1 and Type-2 clones. An unreleased 7.0.0 development line added a ConQAT-style approximate suffix-tree algorithm …