Get length of string in TYPO3 Fluid template

Question

How can I check the length of a string? I want to add a class if under 8 characters.

So something like:

{f:if(condition: '{page.title -> f:count()} < 8', then: ' large')}

Answer 1

With a little trick it is possible with Fluid:

You crop the string to its maximum length and compare the result to the original string. If the cropped string does not match the original, the original string was longer than desired.

{f:if(condition: '{page.title} != {page.title -> f:format.crop(maxCharacters: 8, append:\'\')}', then: ' large')}

Attention: append must be set to an empty string.

Example

lib.stringLength = FLUIDTEMPLATE
lib.stringLength {
    variables {
        shortText = TEXT
        shortText.value = abc
        exactText = TEXT
        exactText.value = four
        longText = TEXT
        longText.value = Lorem ipsum
    }
    template = TEXT
    template.value(
        <h2>{shortText}</h2>
        <p>condition: '{shortText} != {shortText -> f:format.crop(maxCharacters: 4, append:'')}': <br />
            result: {f:if(condition: '{shortText} != {shortText -> f:format.crop(maxCharacters: 4, append:\'\')}', then: ' large')}
        </p>
        <hr />
        <h2>{exactText}</h2>
        <p>condition: '{exactText} != {exactText -> f:format.crop(maxCharacters: 4, append:'')}': <br />
            result: {f:if(condition: '{exactText} != {exactText -> f:format.crop(maxCharacters: 4, append:\'\')}', then: ' large')}
        </p>
        <hr />
        <h2>{longText}</h2>
        <p>condition: '{longText} != {longText -> f:format.crop(maxCharacters: 4, append:'')}': <br />
            result: {f:if(condition: '{longText} != {longText -> f:format.crop(maxCharacters: 4, append:\'\')}', then: ' large')}
        </p>
        <hr />
    )
}

Result:

abc

condition: 'abc != abc':

result:

four

condition: 'four != four':

result:

Lorem ipsum

condition: 'Lorem ipsum != Lore':

result: large