Have there been any new operators to assist in string evaluation in v8.x?

I have the old classic requirement on character fields with 0 data length:

"User must enter at least 7 characters in the field.  Validation must ensure 
that the data entered is not just spaces to get past the validation."

I have the table of 7.6.x functions and wanted to check if a nicer/cleaner 
single one existed yet?

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