php 批量修改mysql 数据表，字段 字符集编码

	$sql="SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = '数据库名称'";
	$r=$pdo->query($sql,2);
	foreach($r as $v){
		//if($v['TABLE_NAME']!='monxin_index_user'){continue;} 代码来源 梦行云软件
		$sql="alter table `".$v['TABLE_NAME']."` convert to character set utf8";
		if($pdo->exec($sql)){echo $sql.'<br />';}
		
	}