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<?php $productStates = array(1,2,3,4,5); if(($key = array_search('3', $productStates)) !== false) { unset($productStates[$key]); } print_r($productStates);
based on td6PY
Output for 4.3.0 - 7.1.10
Array ( [0] => 1 [1] => 2 [3] => 4 [4] => 5 )