php-code-coverage is a PHP library and analysis tool designed to track runtime execution and determine which parts of a codebase are exercised by automated tests. It monitors executed lines and branches during a test run to identify gaps in test coverage and evaluate the effectiveness of a test suite.
The tool functions as an execution tracker and report generator that transforms raw PHP execution data into human-readable formats. It serializes collected metrics for storage and utilizes a processing system to calculate the total percentage of code covered.
Its capability surface covers the entire coverage lifecycle, including data collection, analytical processing, and visual report rendering. It employs source mapping to associate execution offsets with original file lines and uses a driver-based approach to extract statistics from PHP extensions.