function get_array_de_matriz($array, $clave){
$arrayResult = array();
foreach ($array as $key1 => $fila) {
foreach ($fila as $key2 => $valor) {
if($key2 == $clave){
$arrayResult[] = $valor;
}
}
}
return $arrayResult;
}
$query = "select codigo from mitabla";
$arr_codigos = $conn->load($query);
$arr_simple = get_array_de_matriz($arr_codigos, "codigo");
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