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@ 2018-10-31T11:02:00Z

<?php

Class Filter
{
    private $filters = [];

    public function addIds($ids)
    {
        if (empty($this->filters['id']))
        {
            $this->filters['id'] = $ids;
        }
        else
        {
            // Append new ids
/*
            if (!is_array($this->filters['id']))
            {
                $this->filters['id'] = [$this->filters['id']];
            }
            if (!is_array($ids))
            {
                $ids = [$ids];
            }
*/
//            $this->filters['id'] = (array)$this->filters['id'] + (array)$ids;
            $this->filters['id'] = array_unique(array_merge( (array)$this->filters['id'], (array)$ids ));
            
        }
    }
    
    public function getFilters()
    {
        return $this->filters;
    }
}

$filter = new Filter();
$filter->addIds(1);
$filter->addIds(22);
$filter->addIds(2);
//$filter->addIds([1,2,3,4]);
//$filter->addIds([4,3,2,1,0]);

var_dump($filter->getFilters());

Output for 5.6.38, 7.3.24 - 7.3.33, 7.4.12 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: array(1) { ["id"]=> array(3) { [0]=> int(1) [1]=> int(22) [2]=> int(2) } }
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(1) { ["id"]=> array(3) { [0]=> int(1) [1]=> int(22) [2]=> int(2) } }

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