Updates to php files (#49)

* Make the app run via docker compose

* Add basic DB monitoring

* Refactoring

* Allow tracking parent span id

* Update the example to use mysqli

* Update README

* WIP

* wip

* Working setup

* Working copy

* Working copy

* Add README and extract common logic

* Remove conflicts

* Update

Author: prathamesh-sonpatki

php/core/8/composer.json

@@ -1,21 +1,16 @@
 {
     "require": {
-        "guzzlehttp/guzzle": "^7.9",
+        "guzzlehttp/guzzle": "^7.0",
         "open-telemetry/opentelemetry": "^1.0",
         "php-http/httplug": "^2.4",
         "open-telemetry/exporter-otlp": "^1.1",
         "php-http/guzzle7-adapter": "^1.1",
         "open-telemetry/opentelemetry-auto-curl": "^0.0.2",
-        "open-telemetry/opentelemetry-auto-guzzle": "^1.0",
-        "open-telemetry/opentelemetry-auto-psr15": "^1.0",
-        "open-telemetry/opentelemetry-auto-slim": "^1.0",
-        "open-telemetry/sdk": "^1.1",
-        "open-telemetry/sem-conv": "^1.27"
+        "open-telemetry/opentelemetry-auto-guzzle": "^1.0"
     },
     "autoload": {
         "psr-4": {
-            "OpenTelemetry\\Contrib\\Instrumentation\\MySqli\\": "src/OpenTelemetry/Contrib/Instrumentation/MySqli/",
-            "Last9\\": "src/Last9/"
+            "OpenTelemetry\\Contrib\\Instrumentation\\MySqli\\": "src/OpenTelemetry/Contrib/Instrumentation/MySqli/"
         }
     },
     "config": {