Array
(
    [0] => Array
        (
            [salesorderid] => 10001
            [createdtime] => 2016-10-10 10:10:10
        )

    [1] => Array
        (
            [salesorderid] => 10002
            [createdtime] => 2016-10-10 10:10:11
        )

    [2] => Array
        (
            [salesorderid] => 10003
            [createdtime] => 2016-10-10 10:10:12
        )

)

//二维转一维

public function array_column($input, $columnKey, $indexKey = NULL){

    $columnKeyIsNumber = (is_numeric($columnKey)) ? TRUE : FALSE;

    $indexKeyIsNull = (is_null($indexKey)) ? TRUE : FALSE;

    $indexKeyIsNumber = (is_numeric($indexKey)) ? TRUE : FALSE;

    $result = array();

    foreach ((array)$input AS $key => $row)

    {

      if ($columnKeyIsNumber)

      {

        $tmp = array_slice($row, $columnKey, 1);

        $tmp = (is_array($tmp) && !empty($tmp)) ? current($tmp) : NULL;

      }

      else

      {

        $tmp = isset($row[$columnKey]) ? $row[$columnKey] : NULL;

      }

      if ( ! $indexKeyIsNull)

      {

        if ($indexKeyIsNumber)

        {

          $key = array_slice($row, $indexKey, 1);

          $key = (is_array($key) && ! empty($key)) ? current($key) : NULL;

          $key = is_null($key) ? 0 : $key;

        }

        else

        {

          $key = isset($row[$indexKey]) ? $row[$indexKey] : 0;

        }

      }

      $result[$key] = $tmp;

    }

    return $result;

}

//二维数组去掉重复值

function array_unique_fb($array2D){

    foreach ($array2D as $v){

        $v=join(',',$v);  //降维,也可以用implode,将一维数组转换为用逗号连接的字符串

        $temp[]=$v;

    }

    $temp=array_unique($temp);    //去掉重复的字符串,也就是重复的一维数组

    foreach ($temp as $k => $v){

        $temp[$k]=explode(',',$v);   //再将拆开的数组重新组装

    }

    return $temp;

}

//二维数组去掉重复值,并保留键值

function array_unique_fb2($array2D){

    foreach ($array2D as $k=>$v){

        $v=join(',',$v);  //降维,也可以用implode,将一维数组转换为用逗号连接的字符串

        $temp[$k]=$v;

    }

    $temp=array_unique($temp); //去掉重复的字符串,也就是重复的一维数组

    foreach ($temp as $k => $v){

        $array=explode(',',$v); //再将拆开的数组重新组装

        //下面的索引根据自己的情况进行修改即可

        // $temp2[$k]['id'] =$array[0];

        // $temp2[$k]['title'] =$array[1];

        // $temp2[$k]['keywords'] =$array[2];

        // $temp2[$k]['content'] =$array[3];

        $temp2[$k]['filename'] =$array[0];

        $temp2[$k]['arr'] =$array[1];

    }

    return $temp2;

}