MODX: Bestimmten Code nur in der Entwicklungs- oder Produktionsumgebung nutzten

Es gibt Code, der in Entwicklungs- und Stagingumgebungen nicht ausgeführt werden sollte, wie z.B. das Webanalyse-Script. Vielleicht will man aber auch bestimmte Features nicht in der Produktion haben. Das unten stehende Snippet bietet diese Möglichkeiten.

<?php
/* Snippet "identify_current_domain"
 *
 * Returns 1 if the current domain equals a defined domain.tld ("production-domain.tld").
 * 0 if not.
 *
 * Purpose: Use markup, snippets etc. only in production (eg. Google Analytics), or only in dev environment.
 *
 * Properties:
 * identifydomain = Required, domain to identify.
 *
 * Usage:
 * [[identify_current_domain? &identifydomain=`production-domain.tld`]]
 *
 * Using an Output Modifier:
 * [[identify_current_domain:isequalto=`1`:then=`return my stuff`? &identifydomain=`production-domain.tld`]]
 *
 * Using an Output Modifier for Chunks os Snippets (improved performance):
 * [[[[identify_current_domain:isequalto=`1`:then=`$mychunk`? &identifydomain=`production-domain.tld`]]]]
 *
 * You may want to set &identifydomain in a context setting like [[++production_http_host]], at least if you you use this snippet multiple times.
 *
 * Works with one subdomain.
 *
 */
$output = '0';

// get domain to identify
$proddom = $modx->getOption('identifydomain', $scriptProperties, 0);

// get the current domain
$url = $modx->context->getOption('site_url', null, 'default');
$parsedUrl = parse_url($url);
$host = explode('.', $parsedUrl['host']);
$hostitems = count($host);

// check if the URI contains only one subdomain, otherwise exit
if ($hostitems > '3') {
    return;
}

// check if current domain meets domain to identify
if ($hostitems = '2') {
    $domain = "$host[0].$host[1]";
    if ($domain === $proddom) {
        $output = "1";
    }
}

if ($hostitems = '3') {
    $domain = "$host[0].$host[1].$host[2]";
    if ($domain === $proddom) {
        $output = "1";
    }
}

return $output;