Log the output of a placeholder or snippet to the MODX error log. Useful for checking what a placeholder actually outputs...

logOutput.snippet.php

<?php
/*
    logOutput snippet for MODX
    
    Use like this:
    [[!logOutput? &input=`[[+placeholder]]`]] or

*/

if (empty($input)) {
    $modx->log(1, "The output was empty",'','[logOutput]');
} else {
    $modx->log(1, "Output: " . $input,'','[logOutput]');
}