Add Docker setup, PHP parser implementation, and API routing

- Created Dockerfile for PHP 8.2 with necessary extensions and Composer setup.
- Added docker-compose.yml for service configuration and volume management.
- Implemented index.php as the entry point for the PHP parser server.
- Developed CodeParser and CodeVisitor classes for parsing PHP code and extracting structured data.
- Added Router class to handle API requests and responses.
- Included integration test scripts for validating the API functionality.
- Created sample PHP and JSON files for testing purposes.

Author: sumansaurabh

Dockerfile

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+FROM php:8.2-alpine
+
+# Install required extensions and tools
+RUN apk add --no-cache $PHPIZE_DEPS git zip unzip linux-headers \
+    && docker-php-ext-install opcache \
+    && pecl install xdebug \
+    && docker-php-ext-enable xdebug
+
+# Set working directory
+WORKDIR /app
+
+# Install composer
+COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
+
+# Copy composer files and install dependencies
+COPY composer.json composer.lock* ./
+RUN composer install --no-scripts --no-autoloader
+
+# Copy the rest of the application
+COPY . .
+
+# Generate optimized autoloader
+RUN composer dump-autoload --optimize
+
+# Configure PHP for development
+RUN echo "xdebug.mode=develop,debug" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini \
+    && echo "xdebug.client_host=host.docker.internal" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini \
+    && echo "xdebug.start_with_request=yes" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini
+
+# Expose port
+EXPOSE 3010
+
+# Use php development server to run the application
+CMD ["php", "-S", "0.0.0.0:3010", "index.php"]

composer.json

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+{
+  "name": "singularityx/php-parser",
+  "description": "PHP Parser for parsing code structure",
+  "type": "project",
+  "require": {
+    "php": ">=7.4",
+    "nikic/php-parser": "^4.15"
+  },
+  "autoload": {
+    "psr-4": {
+      "PhpParser\\": "src/"
+    }
+  }
+}

docker-compose.yml

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+version: '3'
+
+services:
+  php-parser:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    working_dir: /app
+    volumes:
+      - .:/app
+      - /app/vendor
+    ports:
+      - "5684:3010"
+    environment:
+      - PORT=3010
+      - PHP_ENV=development
+    # Using PHP development server that auto-reloads when files change
+    command: sh -c "php -S 0.0.0.0:3010 index.php"
+    networks:
+      - snorkell_network
+
+networks:
+  snorkell_network:
+    external: true

index.php

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+<?php
+/**
+ * PHP Parser Server
+ * 
+ * Entry point for the PHP parser server that provides API endpoints
+ * for parsing PHP code and returning structured data.
+ */
+
+// Enable error reporting for development
+ini_set('display_errors', 1);
+ini_set('display_startup_errors', 1);
+error_reporting(E_ALL);
+
+// Load autoloader
+require_once __DIR__ . '/vendor/autoload.php';
+
+use PhpParser\Router;
+
+// Initialize router and handle requests
+$router = new Router();
+$router->handleRequest();

integeration_test/samples/sample1.json

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+{
+    "error": "Invalid request data"
+}