Counting How Many TV Fields Actually Contain Data

If a resource has several image TVs, count only the filled ones before you decide how to build the gallery or slider output.

Projects often store a small gallery across several separate TV fields. Before rendering a slider, thumbnail list, or conditional gallery block, it helps to know how many of those TVs actually contain values.

Simple PHP approach

$tvs = array('image1', 'image2', 'image3', 'image4');
$count = 0;
foreach ($tvs as $tv) {
    if (trim($modx->documentObject[$tv]) !== '') {
        $count++;
    }
}
return $count;

Why count first

skip empty gallery wrappers
switch layout when there is only one image
avoid placeholder output for missing files

Recommendation

Once a gallery starts growing beyond a few TVs, move to a more scalable structure such as MultiTV or another repeatable field pattern. But for a fixed small set of TVs, counting filled values first is perfectly reasonable.

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Outputting a TV Label and Value Only When the TV Is Filled

If a TV may be empty, wrap the whole row or list item in a condition so that the label and the value disappear together.