[MCP SDK] Example update to use proper logging

[ineersa]

Q	A
Bug fix?	yes
New feature?	no
Docs?	no
Issues	Fix #306
License	MIT

Added monolog as dev dependency.
Swapped ConsoleLogger to Monolog -> STDERR with JsonFormatter.
Added commentary with explanation

[Copilot]

Pull Request Overview

This PR updates the MCP SDK example to use proper Monolog logging instead of Symfony's ConsoleLogger. The change addresses issue #306 by implementing structured JSON logging to STDERR as required by the MCP protocol.

Key changes:

• Replace Symfony ConsoleLogger with Monolog logger configured for JSON output to STDERR
• Add Monolog as a development dependency
• Include detailed comments explaining the logging requirements and limitations

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/mcp-sdk/examples/cli/index.php	Replace ConsoleLogger with Monolog using StreamHandler and JsonFormatter for STDERR output
src/mcp-sdk/composer.json	Add monolog/monolog as development dependency

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[Copilot]

[nitpick] The comment uses Markdown formatting (Monolog and WARNING) which is not appropriate for PHP code comments. Consider using plain text formatting for better readability in the source code.

Suggested change

	// **WARNING** this will work only on the development stage with @modelcontextprotocol/inspector, but not in a real client
	// Setup Monolog logger, logger must output JSON to stream to STDERR
	// WARNING: this will work only on the development stage with @modelcontextprotocol/inspector, but not in a real client

[chr-hertel]

Closed due to moving this MCP SDK to https://github.com/modelcontextprotocol/php-sdk.