laravel validation only accept alpha alphanumeric values code example

Example 1: laravel validation alphanumeric with spaces

[
    'field' => 'regex:/[a-zA-Z0-9\s]+/',
]

Example 2: laravel validation alphanumeric with spaces

[
    'field' => 'regex:/^[a-zA-Z0-9\s]+$/',
]

Example 3: laravel validation alphanumeric with spaces

[
    'field' => 'regex:[a-zA-Z0-9\s]+',
]