<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); 
class Model_transact extends Lin_Model 
{
	function __construct(){
		parent::__construct();
		$this->load->database();
		$this->table = 'transact';
		$this->load_table('transact');
	}
	public function insert_batch($keys,$arr){
		$values=array_values($arr);
		$sql=$this->multArray2Insert("crowd_".$this->table,$keys,$values);
		$res=$this->db->query($sql);
		return $res;
	}
	 /**
 * 多条数据同时转化成插入SQL语句
 * @ CreatBy:
 * @param string $table 表名
 * @$arr_key是表字段名的key：$arr_key=array("field1","field2","field3")
 * @param array $arr是字段值 数组示例 arrat(("a","b","c"), ("bbc","bbb","caaa"),('add',"bppp","cggg"))
 * @return string
 */
private function multArray2Insert($table, $arr_key, $arr, $split = '`')
{
    $arrValues = array();
    if (empty($table) || !is_array($arr_key) || !is_array($arr)) {
        return false;
    }
    $sql = "INSERT INTO %s( %s ) values %s ON DUPLICATE KEY UPDATE `updated_at`=".time();
    foreach ($arr as $k => $v) {
        $arrValues[$k] = "'" . implode("','", array_values($v)) . "'";
    }
    $sql = sprintf($sql, $table, "{$split}" . implode("{$split} ,{$split}", $arr_key) . "{$split}", "(" . implode(") , (", array_values($arrValues)) . ")");
    return $sql;
}
	
}  //end class