feat: PHP bindings

Signed-off-by: Dmitry Dygalo <dmitry@dygalo.dev>

Author: Stranger6667

.github/workflows/build.yml

@@ -531,6 +531,135 @@ jobs:
           DEFAULT_CROSS_BUILD_ENV_URL: "https://github.com/pyodide/pyodide/releases/download/0.28.0a3/xbuildenv-0.28.0a3.tar.bz2"
           RUSTFLAGS: "-C link-arg=-sSIDE_MODULE=2 -Z link-native-libraries=no -Z emscripten-wasm-eh"
 
+  test-php:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-22.04, macos-13]
+        php-version: ["8.2", "8.3", "8.4"]
+        clang: ["20"]
+
+    name: PHP ${{ matrix.php-version }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    env:
+      CARGO_TERM_COLOR: always
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache cargo dependencies
+        uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: bindings/php
+
+      - name: Cache LLVM and Clang
+        id: cache-llvm
+        uses: actions/cache@v4
+        if: matrix.os == 'ubuntu-22.04'
+        with:
+          path: ${{ runner.temp }}/llvm-${{ matrix.clang }}
+          key: ${{ matrix.os }}-llvm-${{ matrix.clang }}
+
+      - name: Setup LLVM & Clang
+        id: clang
+        uses: KyleMayes/install-llvm-action@v2
+        if: matrix.os == 'ubuntu-22.04'
+        with:
+          version: ${{ matrix.clang }}
+          directory: ${{ runner.temp }}/llvm-${{ matrix.clang }}
+          cached: ${{ steps.cache-llvm.outputs.cache-hit }}
+
+      - name: Configure Clang
+        if: matrix.os == 'ubuntu-22.04'
+        run: |
+          echo "LIBCLANG_PATH=${{ runner.temp }}/llvm-${{ matrix.clang }}/lib" >> $GITHUB_ENV
+          echo "LLVM_VERSION=${{ steps.clang.outputs.version }}" >> $GITHUB_ENV
+          echo "LLVM_CONFIG_PATH=${{ runner.temp }}/llvm-${{ matrix.clang }}/bin/llvm-config" >> $GITHUB_ENV
+
+      - uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+          extensions: mbstring
+          coverage: none
+
+      - name: Build PHP extension
+        run: |
+          # Export PHP configuration for ext-php-rs
+          export PHP_CONFIG=$(which php-config)
+          
+          cargo build --release
+          
+          # Get PHP extension directory
+          EXT_DIR=$(php -r "echo ini_get('extension_dir');")
+          
+          # Find the built library - ext-php-rs names it differently on different platforms
+          if [[ "${{ matrix.os }}" == "macos-13" ]]; then
+            # On macOS, look for .dylib files
+            BUILT_LIB=$(find target/release -name "libcss_inline_php.dylib" -o -name "css_inline_php.dylib" | head -1)
+            if [[ -z "$BUILT_LIB" ]]; then
+              # Fallback: any .dylib file
+              BUILT_LIB=$(find target/release -name "*.dylib" | head -1)
+            fi
+            sudo cp "$BUILT_LIB" "$EXT_DIR/css_inline.so"
+          else
+            # On Linux, look for .so files
+            BUILT_LIB=$(find target/release -name "libcss_inline_php.so" -o -name "css_inline_php.so" | head -1)
+            if [[ -z "$BUILT_LIB" ]]; then
+              # Fallback: any .so file
+              BUILT_LIB=$(find target/release -name "*.so" | head -1)
+            fi
+            sudo cp "$BUILT_LIB" "$EXT_DIR/css_inline.so"
+          fi
+          
+          echo "Built library: $BUILT_LIB"
+          echo "Installed to: $EXT_DIR/css_inline.so"
+          
+          # Verify the file exists and has correct permissions
+          ls -la "$EXT_DIR/css_inline.so"
+        working-directory: ./bindings/php
+        shell: bash
+
+      - name: Enable and verify extension
+        run: |
+          # Create ini file to load extension
+          if [[ "${{ matrix.os }}" == "macos-13" ]]; then
+            # On macOS, find the additional ini directory
+            PHP_INI_DIR=$(php -i | grep "Scan this dir for additional .ini files" | cut -d' ' -f9 | tr -d ' ')
+            if [[ -z "$PHP_INI_DIR" || "$PHP_INI_DIR" == "(none)" ]]; then
+              # If no scan dir, use the main php.ini location
+              PHP_INI=$(php -i | grep "Loaded Configuration File" | cut -d' ' -f9)
+              PHP_INI_DIR=$(dirname "$PHP_INI")/conf.d
+              sudo mkdir -p "$PHP_INI_DIR"
+            fi
+            echo "extension=css_inline" | sudo tee "$PHP_INI_DIR/99-css_inline.ini"
+          else
+            echo "extension=css_inline" | sudo tee /etc/php/${{ matrix.php-version }}/cli/conf.d/99-css_inline.ini
+          fi
+          
+          # Verify extension is loaded
+          php -m | grep -i css_inline || (
+            echo "Extension failed to load. Debugging info:"
+            echo "PHP Version:"
+            php -v
+            echo "Extension dir contents:"
+            ls -la $(php -r "echo ini_get('extension_dir');")
+            echo "PHP info grep for css_inline:"
+            php -i | grep -i css_inline || true
+            echo "Try loading directly:"
+            php -d "extension=$(php -r 'echo ini_get("extension_dir");')/css_inline.so" -m | grep -i css_inline || true
+            exit 1
+          )
+        shell: bash
+
+      - name: Install dependencies
+        run: composer install --no-interaction --prefer-dist
+        working-directory: ./bindings/php
+
+      - name: Run tests
+        run: composer test
+        working-directory: ./bindings/php
+
   test-ruby:
     strategy:
       fail-fast: false

bindings/php/.cargo/config.toml

@@ -0,0 +1,12 @@
+[target.x86_64-unknown-linux-gnu]
+rustflags = ["-C", "link-arg=-Wl,-undefined,dynamic_lookup"]
+
+[target.x86_64-apple-darwin]
+rustflags = ["-C", "link-arg=-Wl,-undefined,dynamic_lookup"]
+
+[target.aarch64-apple-darwin]
+rustflags = ["-C", "link-arg=-Wl,-undefined,dynamic_lookup"]
+
+[target.x86_64-pc-windows-msvc]
+linker = "rust-lld"
+rustflags = ["-C", "link-arg=/FORCE"]

bindings/php/.gitignore

@@ -0,0 +1,3 @@
+/vendor/
+/composer.lock
+/.phpunit.cache/

bindings/php/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "css_inline"
+version = "0.15.0"
+edition = "2024"
+authors = ["Dmitry Dygalo <dmitry@dygalo.dev>"]
+
+[lib]
+name = "css_inline_php"
+crate-type = ["cdylib"]
+
+[dependencies]
+ext-php-rs = "0.14"
+
+[dependencies.css-inline]
+path = "../../css-inline"
+version = "*"
+default-features = false
+features = ["http", "file", "stylesheet-cache"]

bindings/php/README.md

@@ -0,0 +1,26 @@
+# css_inline
+
+[<img alt="build status" src="https://img.shields.io/github/actions/workflow/status/Stranger6667/css-inline/build.yml?style=flat-square&labelColor=555555&logo=github" height="20">](https://github.com/Stranger6667/css-inline/actions/workflows/build.yml)
+[<img alt="codecov.io" src="https://img.shields.io/codecov/c/gh/Stranger6667/css-inline?logo=codecov&style=flat-square&token=tOzvV4kDY0" height="20">](https://app.codecov.io/github/Stranger6667/css-inline)
+[<img alt="gitter" src="https://img.shields.io/gitter/room/Stranger6667/css-inline?style=flat-square" height="20">](https://gitter.im/Stranger6667/css-inline)
+
+`css_inline` is a high-performance library for inlining CSS into HTML 'style' attributes.
+
+## Performance
+
+This library uses components from Mozilla's Servo project for CSS parsing and matching.
+Performance benchmarks show 3-9x faster execution than `tijsverkoyen/css-to-inline-styles`.
+
+The table below shows benchmark results comparing `css_inline` with `tijsverkoyen/css-to-inline-styles` on typical HTML documents:
+
+|                   | Size    | `css_inline 0.15.0` | `tijsverkoyen/css-to-inline-styles 2.2.7` | Speedup |
+|-------------------|---------|---------------------|-------------------------------------------|---------|
+| Simple            | 230 B   | 5.99 µs             | 28.06 µs                                  | **4.68x** |
+| Realistic email 1 | 8.58 KB | 102.25 µs           | 313.31 µs                                 | **3.06x** |
+| Realistic email 2 | 4.3 KB  | 71.98 µs            | 655.43 µs                                 | **9.10x** |
+| GitHub Page†      | 1.81 MB | 163.80 ms           | 8.22 ms*                                  | N/A |
+
+> † The GitHub page benchmark uses modern CSS that `tijsverkoyen/css-to-inline-styles` cannot process, resulting in skipped styles and an invalid comparison.
+
+Please refer to the `benchmarks/InlineBench.php` file to review the benchmark code.
+The results displayed above were measured using stable `rustc 1.88` on PHP `8.4.10`.

bindings/php/benchmarks/InlineBench.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace CssInline\Benchmarks;
+
+use PhpBench\Benchmark\Metadata\Annotations\ParamProviders;
+use CssInline;
+use TijsVerkoyen\CssToInlineStyles\CssToInlineStyles;
+
+class InlineBench
+{
+    private CssToInlineStyles $cssToInlineStyles;
+
+    public function __construct()
+    {
+        $this->cssToInlineStyles = new CssToInlineStyles();
+    }
+
+    /**
+     * @ParamProviders("provideBenchmarkCases")
+     */
+    public function benchCssInline(array $params): void
+    {
+        \CssInline\inline($params['html']);
+    }
+
+    /**
+     * @ParamProviders("provideBenchmarkCases")
+     */
+    public function benchCssToInlineStyles(array $params): void
+    {
+        $this->cssToInlineStyles->convert($params['html']);
+    }
+
+
+    public function provideBenchmarkCases(): \Generator
+    {
+        $jsonPath = __DIR__ . '/../../../benchmarks/benchmarks.json';
+        $json = file_get_contents($jsonPath);
+        $benchmarks = json_decode($json, true);
+
+        foreach ($benchmarks as $benchmark) {
+            yield $benchmark['name'] => [
+                'html' => $benchmark['html']
+            ];
+        }
+    }
+}

bindings/php/composer.json

@@ -0,0 +1,28 @@
+{
+  "name": "css-inline/php",
+  "description": "High-performance library for inlining CSS into HTML 'style' attributes",
+  "type": "library",
+  "license": "MIT",
+  "require": {
+    "php": ">=8.2",
+    "ext-css_inline": "*"
+  },
+  "require-dev": {
+    "phpbench/phpbench": "^1.4",
+    "phpunit/phpunit": "^10.5",
+    "tijsverkoyen/css-to-inline-styles": "^2.3"
+  },
+  "autoload-dev": {
+    "psr-4": {
+      "CssInline\\Tests\\": "tests/CssInlineTest"
+    }
+  },
+  "scripts": {
+    "test": "phpunit",
+    "bench": "phpbench run --report=default --iterations=10 --revs=100"
+  },
+  "config": {
+    "sort-packages": true,
+    "optimize-autoloader": true
+  }
+}

bindings/php/phpbench.json

@@ -0,0 +1,7 @@
+{
+  "runner.bootstrap": "vendor/autoload.php",
+  "runner.path": "benchmarks",
+  "runner.php_config": {
+    "extension": "target/release/libcss_inline_php.so"
+  }
+}

bindings/php/phpunit.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
+         colors="true"
+         stopOnFailure="false">
+    <testsuites>
+        <testsuite name="CssInline Test Suite">
+            <directory>tests</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>

bindings/php/src/lib.rs

@@ -0,0 +1,87 @@
+use std::fmt::Display;
+
+use ext_php_rs::{exception::PhpException, prelude::*, zend::ce};
+
+#[php_class]
+#[php(name = "CssInline\\InlineError")]
+#[php(extends(ce = ce::exception, stub = "\\Exception"))]
+#[derive(Default)]
+pub struct InlineError;
+
+fn from_error<E: Display>(error: E) -> PhpException {
+    PhpException::from_class::<InlineError>(error.to_string())
+}
+
+#[php_class]
+#[php(name = "CssInline\\CssInliner")]
+pub struct CssInliner {
+    inner: css_inline::CSSInliner<'static>,
+}
+
+#[php_impl]
+impl CssInliner {
+    #[php(defaults(
+        inline_style_tags = true,
+        keep_style_tags = false,
+        keep_link_tags = false,
+        load_remote_stylesheets = true,
+    ))]
+    #[php(optional = inline_style_tags)]
+    pub fn __construct(
+        inline_style_tags: bool,
+        keep_style_tags: bool,
+        keep_link_tags: bool,
+        load_remote_stylesheets: bool,
+        base_url: Option<String>,
+        extra_css: Option<String>,
+    ) -> PhpResult<CssInliner> {
+        let base_url = if let Some(url) = base_url {
+            Some(css_inline::Url::parse(&url).map_err(from_error)?)
+        } else {
+            None
+        };
+
+        let options = css_inline::InlineOptions {
+            inline_style_tags,
+            keep_style_tags,
+            keep_link_tags,
+            base_url,
+            load_remote_stylesheets,
+            extra_css: extra_css.map(Into::into),
+            ..Default::default()
+        };
+
+        Ok(CssInliner {
+            inner: css_inline::CSSInliner::new(options),
+        })
+    }
+
+    pub fn inline(&self, html: &str) -> PhpResult<String> {
+        self.inner.inline(html).map_err(from_error)
+    }
+
+    pub fn inline_fragment(&self, html: &str, css: &str) -> PhpResult<String> {
+        self.inner.inline_fragment(html, css).map_err(from_error)
+    }
+}
+
+#[php_function]
+#[php(name = "CssInline\\inline")]
+pub fn inline(html: &str) -> PhpResult<String> {
+    css_inline::inline(html).map_err(from_error)
+}
+
+#[php_function]
+#[php(name = "CssInline\\inline_fragment")]
+pub fn inline_fragment(fragment: &str, css: &str) -> PhpResult<String> {
+    css_inline::inline_fragment(fragment, css).map_err(from_error)
+}
+
+#[php_module]
+pub fn get_module(module: ModuleBuilder) -> ModuleBuilder {
+    module
+        .class::<InlineError>()
+        .class::<CssInliner>()
+        .function(wrap_function!(inline))
+        .function(wrap_function!(inline_fragment))
+}