Gets a ContentBlocks Layout setting.

cbGetLayoutSetting.snippet.php

<?php
/**
 * Use the cbGetLayoutSetting snippet to get a setting from a particular layout.
 * @author YJ Tso @sepiariver <[email protected]>
 * @param (id) &resource allows checking for fields on other resources.
 * @param (bool) &showDebug return debugging info as JSON.
 * @param (string) &toPlaceholder set a placeholder with this string as key, instead of returning.
 * @param required (int) &layout - ID of ContentBlocks layout from which to fetch the setting.
 * @param required (string) &setting - key of layout setting to return.
 *
 * Example:
 * [[cbGetLayoutSetting? &layout=`8` &setting=`layout-setting-key`]]
 * 
 * @var modX $modx
 * @var array $scriptProperties
 */
 

$resource = (isset($scriptProperties['resource']) && $scriptProperties['resource'] != $modx->resource->get('id')) ? $modx->getObject('modResource', $scriptProperties['resource']) : $modx->resource;
if (!$resource) {
    return '';
}
$layout = $modx->getOption('layout', $scriptProperties, '');
$setting = $modx->getOption('setting', $scriptProperties, '');
$showDebug = $modx->getOption('showDebug', $scriptProperties, false, true);
$toPlaceholder = $modx->getOption('toPlaceholder', $scriptProperties, '');

$debug = array('scriptProperties' => $scriptProperties, 'message' => '');
$output = '';

if (empty($layout) || empty($setting)) {
    $showDebug = true;
    $debug['message'] .= 'layout and setting properties are required. ';
} else { 
    // Make sure this is a contentblocks-enabled resource
    $enabled = $resource->getProperty('_isContentBlocks', 'contentblocks');
    if ($enabled !== true) return;
    $debug['cbenabled'] = (bool) $enabled;
    
    $cbcontent = $resource->getProperty('content', 'contentblocks');
    $debug['cbcontent'] = $cbcontent;
    
    $cbcontent = $modx->fromJSON($cbcontent);
    if (is_array($cbcontent) && !empty($cbcontent)) {
        foreach ($cbcontent as $index => $item) {
            if (($item['layout'] == $layout) && isset($item['settings'][$setting])) {
                $output = $item['settings'][$setting];
                break;
            }
        }
    } else {
        $debug['message'] .= 'cbcontent was not an array or was empty. ';
    }
    
    if (empty($output)) {
        $debug['message'] .= 'setting was not found. ';
    } else {
        $debug['output'] = $output;
    }
    //$debug['resource_props'] = $resource->get('properties');
}

if ($showDebug) $output = $modx->toJSON($debug);
if (empty($toPlaceholder)) return $output;
$modx->setPlaceholder($toPlaceholder, $output);

Thanks, a modified snippet for getting a templated list of ContentBlocks layout settings could be found on https://gist.github.com/Jako/bebdbbac3bf1798c35605a0cfdea72ec