# Is Alphanumeric

Returns `true` if string contains **only** alphanumeric characters. Punctuation, whitespace, and another other special characters will cause a `false`.

```yaml
secret_phrase: abc123
even_more_secret_phrase: abc123!@#
```


::tabs

::tab antlers:
```antlers
{{ if secret_phrase | is_alphanumeric }}
{{ if even_more_secret_phrase | is_alphanumeric }}
```
::tab blade
```blade
@if (Statamic::modify($secret_phrase)->isAlphanumeric()->fetch()) @endif
@if (Statamic::modify($even_more_secret_phrase)->isAlphanumeric()->fetch()) @endif
```
::

```html
true
false
```