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Show HN: GNU Grep as a PHP Extension

This project unveils a new PHP extension that natively integrates the powerful GNU Grep engine, moving beyond slow shell_exec calls to offer high-performance text searching directly within PHP applications. It's a deep dive into bridging C and PHP, a topic often celebrated on Hacker News for its technical ingenuity and potential for significant performance gains. The extension aims to provide PHP developers with granular control and the robust feature set of GNU Grep without the overhead of external process calls.

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#14
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Apr 15, 6:00 PM
Last Seen
Apr 15, 8:00 PM
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The Lowdown

This 'Show HN' project, ext-gnu-grep, introduces a native PHP extension that embeds the core functionality of GNU Grep directly into PHP. Unlike simple wrappers that invoke the grep command-line utility, this extension is implemented in C and links against the upstream GNU Grep source, promising significant performance advantages for intensive text processing tasks within PHP applications.

Key aspects and features of the extension include:

  • Native Integration: Developed in C with phpize, it compiles into a shared object (grep.so), directly utilizing GNU Grep's internal matching engines rather than relying on external command execution.
  • Comprehensive Features: It exposes grep_version(), GNUGrep\Engine, and GNUGrep\Pattern classes, supporting fixed-string, basic, and extended regular expressions, including common PHP-style regex shorthands.
  • Extensive grep Switch Support: A substantial subset of GNU Grep's command-line options are implemented within GNUGrep\Engine::run(), covering pattern modes, matcher controls, recursive search, binary handling, result shaping, output controls, and context controls.
  • Flexible API: Provides a concise ggrep() helper for quick usage, GNUGrep\Engine::run() for precise CLI-style argument control, and dedicated class helpers for specific path-only or buffer-only operations.
  • Performance Benchmarking: Includes tools and harnesses to compare its correctness and timing directly against standalone GNU Grep, focusing on both filesystem traversal and in-memory grep work.
  • Licensing: Explicitly notes GPLv3-or-later implications due to embedding GNU Grep.
  • Example Use Cases: Demonstrates practical applications such as searching PSR-4 autoload trees for PHP type declarations, useful for code audits.

By bringing GNU Grep's acclaimed speed and capabilities into the PHP runtime, ext-gnu-grep offers a compelling solution for developers needing efficient, powerful text and pattern matching without the performance penalties traditionally associated with calling external processes.