Custom module collection array not return

Question

I have created a custom module and I have return collection array but it does not return foreach array in Magento 2.3.2. it returns the only foreach last value.

Block Code

<?php
namespace Developer\Infographics\Block\Index;

use Magento\Framework\View\Element\Template;
use Magento\Catalog\Model\CategoryFactory;


class Leftinfographics extends Template {

    public function __construct(
   \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory,

        array $data = []) 
    {

        parent::__construct($context, $data);
        $this->pageConfig = $pageConfig;
        $this->collectionFactory = $collectionFactory;
    }

    public function getCategoryViceversaCollection()
    {
        $collection = array();
        $finalsearch = 'test,magento,abc,xyz'
        $commaList = explode(',', $finalsearch);
        foreach ($commaList as $key => $value) {
        $collection = $this->collectionFactory->create()->getCollection()->addFieldToFilter('tags', array('like' => '%'.$value.'%'));
        }
        return $collection;
    }
}

Template Code

$productxyzdata = $block->getXYZ();
var_dump($productCollectiondata->getData());

Answer 1

this is because you are creating a new collection with every iteration, thus only having the last one

$collection = array();
$finalsearch = 'test,magento,abc,xyz'
$commaList = explode(',', $finalsearch);
$collection = $this->collectionFactory->create();
foreach ($commaList as $key => $value) {
    $collection->addFieldToFilter('tags', array('like' => '%'.$value.'%'));
}
return $collection;

Answer 2

Try using this way

$collection = [];
$finalsearch = 'test,magento,abc,xyz';
$commaList = explode(',', $finalsearch);
foreach ($commaList as $key => $value) {
    $collection[] = $this->collectionFactory->create()->getCollection()->addFieldToFilter('tags', array('like' => '%'.$value.'%'));
}
return $collection;

Answer 3

Try this below code :

$collection = [];
$finalsearch = 'test,magento,abc,xyz';
$commaList = explode(',', $finalsearch);
foreach ($commaList as $key => $value) {
    $collection[] = $this->collectionFactory->create()->addFieldToFilter('tags', ['like' => '%' . $value . '%'])->getData();
}
return $collection;

make sure your collection class should be Developer\Infographics\Model\ResourceModel\Infographics\CollectionFactory