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You are reading the docs for an old version of Statamic. Consider upgrading to Statamic 6.

Is Alpha Modifier

Returns true if string contains only alphabetic characters. Numbers, punctuation, whitespace, and another other special characters will cause a false.

secret_phrase: abcdefg

even_more_secret_phrase: abc123

{{ if secret_phrase | is_alpha }}

{{ if even_more_secret_phrase | is_alpha }}

@if (Statamic::modify($secret_phrase)->isAlpha()->fetch()) @endif

@if (Statamic::modify($even_more_secret_phrase)->isAlpha()->fetch()) @endif

true

false