Станислав

{$_modx->runSnippet('!msProducts', [
                'parents'=> '4', 
                'tpl'=>'',
                'where' => ['Data.size:LIKE' => $lowerpagetitle],
                'showLog' => '1'
        ])}

{$_modx->runSnippet('!msProducts', [
                'parents'=> '4', 
                'tpl'=>'',
                'where' => ['Data.size:LIKE' => '%' ~ $lowerpagetitle ~ '%'],
                'showLog' => '1'
        ])}

{if $_modx->resource.tv == id пользователя}
...какой то код если это пользователь с указанным ID
{else}
    можно все скрыть
{/if}

[[getImageList?
&docid=`[[*id-test]]`
&tvname=`product-img`
&tpl=`@CODE <img src="[[+img-prod]]" alt="[[+pagetitle]]">`
]]

<?php
$ids = $modx->runSnippet('pdoResources', array(
	 'parents'=>0,
	 'templates'=>8,
	 'limit'=>0,
	 'returnIds'=>1
));
$arr = explode(',', $ids);
$rate = $modx->runSnippet('CRcalc', array('input'=>1, 'multiplier'=>'EUR'));
foreach($arr as $id){
	$resource = $modx->getObject('modResource', $id); 
         if ($resource->getTVValue('price_eur') != 0 && $resource->getTVValue('price_eur') != '') { 
	    if($resource->getTVValue('price')) continue;                  
            $price_eur = $resource->getTVValue('price_eur');
            $price_rub = $price_eur*$rate; 
	    $resource->setTVValue('price', $price_rub); 
        } else {
            if($resource->getTVValue('price')) continue;        
            $resource->setTVValue('price', $price_rub); 
        }
}

<?php
$ids = $modx->runSnippet('pdoResources', array(
	 'parents'=>0,
	 'templates'=>8,
	 'limit'=>0,
	 'returnIds'=>1
));
$arr = explode(',', $ids);
$rate = $modx->runSnippet('CRcalc', array('input'=>1, 'multiplier'=>'EUR'));
foreach($arr as $id){
	$resource = $modx->getObject('modResource', $id); 
         if ($resource->getTVValue('price_eur') != 0 && $resource->getTVValue('price_eur') != '') { 
	    if($resource->getTVValue('price')) continue;                  
            $price_eur = $resource->getTVValue('price_eur');
            $price_rub = $price_eur*$rate; 
	    $resource->setTVValue('price', $price_rub); 
        }
}

&where=`{"pagetitle:LIKE" : "%Кроссовки%"}`

{set $array = ["1","2","4"]}
{if $_modx->resource.parent is list $array}
    {set $options = 'weight,size,long'}
{/if}
{'msOptions' | snippet : [
    'options' => $options,
    'tpl' => 'chunk'
]}