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Is Alphanumeric Modifier

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

secret_phrase: abc123 
even_more_secret_phrase: abc123!@# 
{{ if secret_phrase | is_alphanumeric }} 
{{ if even_more_secret_phrase | is_alphanumeric }} 
@if (Statamic::modify($secret_phrase)->isAlphanumeric()->fetch()) @endif 
@if (Statamic::modify($even_more_secret_phrase)->isAlphanumeric()->fetch()) @endif 
true 
false