Answers for "php merge 2 arrays remove duplicates"

php remove duplicates from multidimensional array

$serialized = array_map('serialize', $targetArray);
$unique = array_unique($serialized);
return array_intersect_key($targetArray, $unique);

php combine 2 arrays keep duplicates

$arrKeys = array('str', 'str', 'otherStr');
$arrVals = array('1.22', '1.99', '5.17');
function foo($key, $val) {
   return array($key=>$val);
}

$arrResult = array_map('foo', $arrKeys, $arrVals);