<?php
//获取表的名称
function list_tables($database)
{
	$rs = mysql_list_tables($database);
	$tables = array();
	while ($row = mysql_fetch_row($rs)) 
	{
		$tables[] = $row[0];
	}
	mysql_free_result($rs);
	return $tables;
}
//导出数据库
function dump_table($table, $fp = null)
{
	$need_close = false;
	if (is_null($fp)) 
	{
		$fp = fopen($table . '.sql', 'w');
		$need_close = true;
	}
	$a=mysql_query("show create table `{$table}`");
	$row=mysql_fetch_assoc($a);fwrite($fp,$row['Create Table'].';'."\r\n");//导出表结构
	$rs = mysql_query("SELECT * FROM `{$table}`");
	while ($row = mysql_fetch_row($rs)) {
		fwrite($fp, get_insert_sql($table, $row));
	}
	mysql_free_result($rs);
	if ($need_close) {
		fclose($fp);
	}
}
//导出表数据
function get_insert_sql($table, $row)
{
	$sql = "INSERT INTO `{$table}` VALUES (";
	$values = array();
	foreach ($row as $value) {
		$values[] = "'" . mysql_real_escape_string($value) . "'";
	}
	$sql .= implode(', ', $values) . ");\r\n";
	return $sql;
}
///////************************///////下面正式开始//////***************************///////
$database='apiweb';//数据库名

//设置日期为备份文件名
date_default_timezone_set('PRC');
$t_name = date("Ymd_His");

$options=array(
	'hostname' => 'localhost',//ip地址
	'charset' => '',//编码
	'filename' => $database.$t_name.'.sql',//文件名
	'username' => 'root',
'password' => ''
);
mysql_connect($options['hostname'],$options['username'],$options['password'])or die("不能连接数据库!");
mysql_select_db($database) or die("数据库名称错误!");
mysql_query("SET NAMES '{$options['charset']}'");
$tables = list_tables($database);
$filename = sprintf($options['filename'],$database);
$fp = fopen($filename, 'w');
foreach ($tables as $table) {
dump_table($table, $fp);
}
fclose($fp);
//下载sql文件
$file_name=$options['filename'];
Header("Content-type:application/octet-stream");
Header("Content-Disposition:attachment;filename=".$file_name);
readfile($file_name);
//删除服务器上的sql文件
//unlink($file_name);
exit;
?>