refactor: 🎨 split files (and more refactoring)

- split the single php file in multiple files.
- update readme ( file->folder, new screenshot, ideas section)
- add php unit tests (for file-parsing) with test data.
- add phpcs with coding standards (PSR12).
- add travis support.

This is no longer a single-file gui! The path for the viewer changed, you no longer open http://example.com/php-error-log-viewer/php-error-log-viewer.php but https://examle.com/php-error-log-viewer/

.gitignore

@@ -1,4 +1,4 @@
-
 vendor/
-
 composer.lock
+.phpunit.result.cache
+*.code-workspace

composer.json

@@ -27,5 +27,22 @@
 		"issues": "https://github.com/schuhwerk/php-error-log-viewer/issues",
 		"source": "https://github.com/schuhwerk/php-error-log-viewer"
 	},
-	"type": "development-tool"
-}
+	"type": "development-tool",
+	"config": {
+		"sort-packages": true,
+		"allow-plugins": {
+			"dealerdirect/phpcodesniffer-composer-installer": true
+		}
+	},
+	"require-dev": {
+		"phpunit/phpunit": "^9",
+		"squizlabs/php_codesniffer": "^3",
+		"dealerdirect/phpcodesniffer-composer-installer": "^0.7"
+	},
+	"scripts": {
+		"test": "phpunit",
+		"phpcs": [
+			"vendor/bin/phpcs --standard=phpcs.xml --extensions=php"
+		]
+	}
+}

index.php

@@ -0,0 +1,28 @@
+<?php
+
+/**
+ * PHP Error Log Viewer.
+ * Check readme.md for more information.
+ *
+ * Disclaimer
+ * - This contains code for reading & deleting your log-file.
+ * - Log files might contain sensitive information.
+ * - It is meant for development-environments
+ */
+
+namespace Php_Error_Log_Viewer;
+
+require_once 'src/LogHandler.php';
+require_once 'src/AjaxHandler.php';
+
+$path = 'php-error-log-viewer.ini';
+// search settings directly outside the vendor folder.
+$settings = file_exists('../../' . $path) ? parse_ini_file('../../' . $path) : array();
+// search settings in the same folder as the file.
+$settings = file_exists($path) ? parse_ini_file($path) : $settings;
+
+$log_handler = new LogHandler($settings);
+$ajax_handler = new AjaxHandler($log_handler);
+$ajax_handler->handle_ajax_requests();
+
+readfile('./src/error-log-viewer-frontend.html');