laravel批量更新方法实现

//同时更新多个记录，参数，表名，数组（别忘了在一开始use DB;）
public function updateBatch($tableName = "", $multipleData = array()){
    if( $tableName && !empty($multipleData) ) {

        // column or fields to update
        $updateColumn = array_keys($multipleData[0]);
        $referenceColumn = $updateColumn[0]; //e.g id
        unset($updateColumn[0]);
        $whereIn = "";

        $q = "UPDATE ".$tableName." SET ";
        foreach ( $updateColumn as $uColumn ) {
            $q .=  $uColumn." = CASE ";

            foreach( $multipleData as $data ) {
                $q .= "WHEN ".$referenceColumn." = ".$data[$referenceColumn]." THEN '".$data[$uColumn]."' ";
            }
            $q .= "ELSE ".$uColumn." END, ";
        }
        foreach( $multipleData as $data ) {
            $whereIn .= "'".$data[$referenceColumn]."', ";
        }
        $q = rtrim($q, ", ")." WHERE ".$referenceColumn." IN (".  rtrim($whereIn, ', ').")";

        // Update
        return DB::update(DB::raw($q));

    } else {
        return false;
    }