how to use regex validation in laravel code example

Example 1: enie letter validation laravel regex

return [
                    'fname' => 'required|max:255|regex:/^[a-zA-ZÑñ\s]+$/',
                    'lname' => 'required|max:255|regex:/^[a-zA-ZÑñ\s]+$/',
                    'mname' => 'max:255|alpha',
                     'file' => 'image|mimes:jpg,jpeg,png',
               'contact_no' => 'regex:/^[-0-9\+]+$/',
            'date_of_birth' => 'required|date_format:Y-m-d',
                'school_id' => 'required|exists:schools,id',
                'degree_id' => 'required|exists:degrees,id',
        ];

Example 2: laravel validation example

//import		
		use Illuminate\Support\Facades\Validator;
	
		// single var check
        $validator = Validator::make(['data' => $value],
            ['data' => 'string|min:1|max:10']
        );
        if ($validator->fails()) {
            // your code
        }

        // array check
        $validator = Validator::make(['data' => $array],
            ['email' => 'string|min:1|max:10'],
            ['username' => 'string|min:1|max:10'],
            ['password' => 'string|min:1|max:10'],
            ['...' => '...']
        );

        if ($validator->fails()) {
            // your code
        }