PHP实现单条sql执行多个数据的insert语句方法

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2018/4/21
 * Time: 10:41
 */
header("Content-type: text/html; charset=utf-8");
$mysqli = new mysqli('localhost','root','root','sql');
$mysqli->query('set names utf8');
//批量插入演示
$data[] = array('aa',10);
$data[] = array('bb',20);
$data[] = array('cc',30);
$fields = array('name','score');
$sql = warpSqlByData('bb',$data,$fields);
$falg = $mysqli->query($sql);
if($falg)
{
 echo '执行完成';
}
//写一个函数 用来生产多条数据的单句sql
function warpSqlByData($table,$data,$fields)
{
 $sql = "INSERT INTO ".$table;
 $col_list ='';
 $value_list ='';
 $fields = array_map('formatclos',$fields);
 if(is_array($fields))
 {
  $col_list = implode(',',$fields);
 }
 //组织列
 $cols = '('.$col_list.')';
 $sql = $sql.$cols;
 //再来组织value部分
 foreach ($data as $value)
 {
  //判断列的值 进行转化
  $value = array_map('formatvalues',$value);
  $value_part = implode(',',$value);
  $value_list .= '('.$value_part.'),';
 }
 $value_list = rtrim($value_list,',');
 $value_list = ' VALUES'.$value_list;
 $sql = $sql.$value_list;
 return $sql;
}
//格式化列名
function formatclos($col)
{
 return sprintf("`$col`");
}
//格式化列名
function formatvalues($val)
{
 return sprintf("'$val'");
}