<?php $abbreviations = array("AL","AK","AZ","AR"); $states = array("Alabama","Alaska","Arizona","Arkansas"); $stateMap = array_combine($abbreviations,$states); print_r($stateMap); $arr =[1,3,5,7,3,5,7]; foreach($arr as $v ){ if(!in_array($v,$tmp)){ $tmp[]=$v; } }print_r($tmp);
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