phpimplodemysql_如何利用php读取txt文件再将数据插入到数据库

A. php 把数组插入数据库

lxydjx 正解，我来详细补充一下吧。未经测试、、、

//初始化
$sql = array();

// 从 a.php POST 过来的值
$_POST["xinxi"] = "20-2,19-1,18-1";

// 拆分为 array("20-2", "19-1", "18-1");
$post_data = explode(",", $_POST["xinxi"]);

// 循环数组
for($i = 0; $i < count($post_data); $i++) {
// 再次拆分每一条信息为 array("20", "2"), array("19", "1"), array("18", "1")
$details = explode("-", $post_data[$i]);

// 将每一条信息添加到 $sql 数组中
array_push($sql, "(20121015194535193356, ".$details[0].", ".$details[1].")");
}

// 用 , 连接，转换为 string
$sql = implode(",", $sql);

// 插入数据库
mysql_query("INSERT INTO table_sales (dingid, detailsid, buynumber) VALUES ($sql)");

B. php 求一个mysqli的db类注释尽可能的多，初学小白

mysqli一个最简单的例子，要深入封装的话可以自己再增加...

其实个人觉得mysqli已经没什么必要封装了.....

<?php

classdb{	//类名
	public$con;	//定义句柄
	public$result;	//结果存取
	
	publicfunction__construct($Host,$User,$Pass,$DB){	//构建函数
		$this->con=newmysqli($Host,$User,$Pass,$DB);	//调用mysqli类
		if($this->con->connect_error){	//判断是否有错误，有错误则返回连接错误代号和错误内容
			returnarray($this->con->connect_errno,$this->con->connect_error);
		}
	}
	
	publicfunctionquery($sql,$type=''){	//执行查询，$sql为查询语句，$type为resultmode[MYSQLI_USE_RESULT]OR[MYSQLI_STORE_RESULT]执行成功返回true，否则返回false
		$this->result=empty($type)?$this->con->query($sql):$this->con->query($sql,$type);
		return!$this->result?false:true;
	}
	
	publicfunctioninsertid(){	//必须先进行query才能获得插入或更新的id
		return$this->con->insert_id;
	}
	
	publicfunctionfetch($n,$t){//获取结果集，$n必选[array][assoc][field_direct][field][fields][object][row][all],$t为$n对应的可选参数,成功返回结果集
		$f='fetch_'.$n;
		return$this->result->$f($t);
	}
	
	publicfunction__destruct(){	//销毁函数
		if($this->result)$this->result->close();
		if($this->con)$this->con->close();
	}
	
	publicfunctionGetError(){	//获取错误
		returnarray($this->con->errno,$this->con->error);
	}
	
}

$db=newdb('127.0.0.1','','','test');
if(!$db->query("insertintotb(`time`,`amount`)values('1420085532','300')")){
	var_mp($db->GetError());
	die();
}
echo$db->insertid(),PHP_EOL;
$db->query('select*fromtb');
while($arr=$db->fetch('array',MYSQLI_NUM)){
	echo$arr['0'],'',$arr['1'],'',$arr['2'],'',PHP_EOL;
}

C. 如何利用php读取txt文件再将数据插入到数据库

serial_number.txt的示例内容：

serial_number.txt：

DM00001A11 0116,
SN00002A11 0116,
AB00003A11 0116,
PV00004A11 0116,
OC00005A11 0116,
IX00006A11 0116,

创建数据表：

create table serial_number(
id int primary key auto_increment not null,
serial_number varchar(50) not null
)ENGINE=InnoDB DEFAULT CHARSET=utf8;

php代码如下：

$conn = mysql_connect('127.0.0.1','root','') or die("Invalid query: " . mysql_error());
mysql_select_db('test', $conn) or die("Invalid query: " . mysql_error());

$content = file_get_contents("serial_number.txt");
$contents= explode(",",$content);//explode()函数以","为标识符进行拆分

foreach ($contents as $k => $v)//遍历循环
{
$id = $k;
$serial_number = $v;
mysql_query("insert into serial_number (`id`,`serial_number`)
VALUES('$id','$serial_number')");
}

备注：方法有很多种，我这里是在拆分txt文件为数组后，然后遍历循环得到的数组，每循环一次，往数据库中插入一次。

再给大家分享一个支持大文件导入的

<?php
/**
* $splitChar 字段分隔符
* $file 数据文件文件名
* $table 数据库表名
* $conn 数据库连接
* $fields 数据对应的列名
* $insertType 插入操作类型，包括INSERT,REPLACE
*/
function loadTxtDataIntoDatabase($splitChar,$file,$table,$conn,$fields=array(),$insertType='INSERT'){
if(empty($fields)) $head = "{$insertType} INTO `{$table}` VALUES('";
else $head = "{$insertType} INTO `{$table}`(`".implode('`,`',$fields)."`) VALUES('"; //数据头
$end = "')";
$sqldata = trim(file_get_contents($file));
if(preg_replace('/\s*/i','',$splitChar) == '') {
$splitChar = '/(\w+)(\s+)/i';
$replace = "$1','";
$specialFunc = 'preg_replace';
}else {
$splitChar = $splitChar;
$replace = "','";
$specialFunc = 'str_replace';
}
//处理数据体，二者顺序不可换，否则空格或Tab分隔符时出错
$sqldata = preg_replace('/(\s*)(\n+)(\s*)/i','\'),(\'',$sqldata); //替换换行
$sqldata = $specialFunc($splitChar,$replace,$sqldata); //替换分隔符
$query = $head.$sqldata.$end; //数据拼接
if(mysql_query($query,$conn)) return array(true);
else {
return array(false,mysql_error($conn),mysql_errno($conn));
}
}

//调用示例1
require 'db.php';
$splitChar = '|'; //竖线
$file = 'sqldata1.txt';
$fields = array('id','parentid','name');
$table = 'cengji';
$result = loadTxtDataIntoDatabase($splitChar,$file,$table,$conn,$fields);
if (array_shift($result)){
echo 'Success! ';
}else {
echo 'Failed!--Error:'.array_shift($result).' ';
}
/*sqlda ta1.txt
1|0|A
2|1|B
3|1|C
4|2|D

-- cengji
CREATE TABLE `cengji` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`parentid` int(11) NOT NULL,
`name` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `parentid_name_unique` (`parentid`,`name`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=1602 DEFAULT CHARSET=utf8
*/

//调用示例2
require 'db.php';
$splitChar = ' '; //空格
$file = 'sqldata2.txt';
$fields = array('id','make','model','year');
$table = 'cars';
$result = loadTxtDataIntoDatabase($splitChar,$file,$table,$conn,$fields);
if (array_shift($result)){
echo 'Success! ';
}else {
echo 'Failed!--Error:'.array_shift($result).' ';
}
/* sqldata2.txt
11 Aston DB19 2009
12 Aston DB29 2009
13 Aston DB39 2009

-- cars
CREATE TABLE `cars` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`make` varchar(16) NOT NULL,
`model` varchar(16) DEFAULT NULL,
`year` varchar(16) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=14 DEFAULT CHARSET=utf8
*/

//调用示例3
require 'db.php';
$splitChar = ' '; //Tab
$file = 'sqldata3.txt';
$fields = array('id','make','model','year');
$table = 'cars';
$insertType = 'REPLACE';
$result = loadTxtDataIntoDatabase($splitChar,$file,$table,$conn,$fields,$insertType);
if (array_shift($result)){
echo 'Success! ';
}else {
echo 'Failed!--Error:'.array_shift($result).' ';
}
/* sqldata3.txt
11 Aston DB19 2009
12 Aston DB29 2009
13 Aston DB39 2009
*/

//调用示例3
require 'db.php';
$splitChar = ' '; //Tab
$file = 'sqldata3.txt';
$fields = array('id','value');
$table = 'notExist'; //不存在表
$result = loadTxtDataIntoDatabase($splitChar,$file,$table,$conn,$fields);
if (array_shift($result)){
echo 'Success! ';
}else {
echo 'Failed!--Error:'.array_shift($result).' ';
}

//附：db.php
/* //注释这一行可全部释放
?>
<?php
static $connect = null;
static $table = 'jilian';
if(!isset($connect)) {
$connect = mysql_connect("localhost","root","");
if(!$connect) {
$connect = mysql_connect("localhost","Zjmainstay","");
}
if(!$connect) {
die('Can not connect to database.Fatal error handle by /test/db.php');
}
mysql_select_db("test",$connect);
mysql_query("SET NAMES utf8",$connect);
$conn = &$connect;
$db = &$connect;
}
?>

//*/
.
-- 数据表结构：

-- 100000_insert,1000000_insert

CREATE TABLE `100000_insert` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`parentid` int(11) NOT NULL,
`name` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8

100000 （10万）行插入：Insert 100000_line_data use 2.5534288883209 seconds

1000000（100万）行插入：Insert 1000000_line_data use 19.677318811417 seconds

//可能报错：MySQL server has gone away

//解决：修改my.ini/my.cnf max_allowed_packet=20M

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