*facepalm* messing with some old code.

Thanks windows for taking the way no ones does...

out/src/extension.js

@@ -51,7 +51,7 @@ function activate(context) {
 
             // Check what files the current document includes/requires
             var currentFileName = document.uri.fsPath.replace(vscode.workspace.rootPath, '').slice(1);
-            var currentPath = document.uri.fsPath.replace(vscode.workspace.rootPath, '').replace("src/", "");
+            var currentPath = document.uri.fsPath.replace(vscode.workspace.rootPath, '').replace("src", "").replace("//", "/").replace("\\\\", "\\");
 
             // Look through all included/required files for the current document
             for (var f in Indexer.phpFileFunctions) {

out/src/phpCompletionItem.js

@@ -256,7 +256,7 @@ exports.Indexer = {
         }
         libraryResult.forEach(function(path) {
             if (fs.existsSync(path)) {
-                var fileName = path.replace(vscode.workspace.rootPath, "").replace(vscode.workspace.getConfiguration('php')['pocketMinePath'], "").replace("src", "").replace("//", "/");
+                var fileName = path.replace(vscode.workspace.rootPath, "").replace(vscode.workspace.getConfiguration('php')['pocketMinePath'], "").replace("src", "").replace("//", "/").replace("\\\\", "\\");
                 // Creating the default properties
                 var fileProperties = ["phpFileFunctions", "phpFileStaticFunctions", "phpFileUses", "phpFileProperties"];
                 fileProperties.forEach(function(func) {