php判断字符串编码函数

//判断字符串是什么编码
if ($tag === mb_convert_encoding(mb_convert_encoding($tag, "GB2312", "UTF-8"), "UTF-8", "GB2312")) {

}
else {//如果是gb2312 的就转换为utf8的
$tag = mb_convert_encoding($tag, 'UTF-8', 'GB2312');
}

/**
 +----------------------------------------------------------
 * 检查字符串是否是UTF8编码
 +----------------------------------------------------------
 * @param string $string 字符串
 +----------------------------------------------------------
 * @return Boolean
 +----------------------------------------------------------
 */
function is_utf8($string)
{
    return preg_match('%^(?:
         [x09x0Ax0Dx20-x7E]            # ASCII
       | [xC2-xDF][x80-xBF]             # non-overlong 2-byte
       |  xE0[xA0-xBF][x80-xBF]        # excluding overlongs
       | [xE1-xECxEExEF][x80-xBF]{2}  # straight 3-byte
       |  xED[x80-x9F][x80-xBF]        # excluding surrogates
       |  xF0[x90-xBF][x80-xBF]{2}     # planes 1-3
       | [xF1-xF3][x80-xBF]{3}          # planes 4-15
       |  xF4[x80-x8F][x80-xBF]{2}     # plane 16
   )*$%xs', $string);
}

function is_gb2312($str)
{
        for($i=0; $i<strlen($str); $i++) {
                $v = ord( $str[$i] );
                if( $v > 127) {
                        if( ($v >= 228) && ($v <= 233) )
                        {
                                if( ($i+2) >= (strlen($str) - 1)) return true;  // not enough

characters
                                $v1 = ord( $str[$i+1] );
                                $v2 = ord( $str[$i+2] );
                                if( ($v1 >= 128) && ($v1 <=191) && ($v2 >=128) && ($v2 <= 191) ) // utf

编码
                                        return false;
                                else
                                        return true;
                        }
                }
        }
        return true;
}

show databases;
show tables from db_name;

show columns from table_name from db_name;
show index from talbe_name [from db_name];

show status;
show variables;

show [full] processlist;
show table status [from db_name];

show grants for user;

$server = 'localhost';  
$user = 'root';  
$pass = '';  
$dbname = 'dayanmei_com';  
$conn = mysql_connect($server,$user,$pass);  
if(!$conn) die("数据库系统连接失败！");  
mysql_select_db($dbname) or die("数据库连接失败！");  
$result = mysql_query("SHOW TABLES");  
while($row = mysql_fetch_array($result))  
{  
echo $row[0]."";  
mysql_free_result($result);  

}

found_rows() : select
row_count() : update delete insert

drop database if exists `mytest`;
create database `mytest`;
use `mytest`;

drop table if exists `MyTestTable`;
create table `MyTestTable`(`ID` int ,`Name` varchar(10));

insert into `MyTestTable`(`ID`,`Name`)
select '1','role1' union all
select '2','role2' union all
select '3','role3';
select row_count(); -- 输出3(返回新添加的记录数),[注:如果使用insert into...values只返回1]

select * from `MyTestTable`;select found_rows(); -- 输出3(返回选择的行数)
update `MyTestTable` set `Name`='people';select row_count(); -- 输出3(返回修改的行数)
delete from `MyTestTable`;select row_count(); -- 输出3(返回删除的行数)

function mysql_modified_rows () {
        $info_str = mysql_info();
        $a_rows = mysql_affected_rows();
        ereg("Rows matched: ([0-9]*)", $info_str, $r_matched);
        return ($a_rows < 1)?($r_matched[1]?$r_matched[1]:0):$a_rows;
}

require_once 'phpexcel/Classes/PHPExcel.php';
require_once 'phpexcel/Classes/PHPExcel/IOFactory.php';
require_once 'phpexcel/Classes/PHPExcel/Reader/Excel5.php';
$objReader = PHPExcel_IOFactory::createReader('Excel5');//use excel2007 for 2007 format
$objPHPExcel = $objReader->load($filename); //$filename可以是上传的文件，或者是指定的文件
$sheet = $objPHPExcel->getSheet(0);
$highestRow = $sheet->getHighestRow(); // 取得总行数
$highestColumn = $sheet->getHighestColumn(); // 取得总列数
$k = 0;

//循环读取excel文件,读取一条,插入一条
for($j=2;$j<=$highestRow;$j++)
{

$a = $objPHPExcel->getActiveSheet()->getCell("A".$j)->getValue();//获取A列的值
$b = $objPHPExcel->getActiveSheet()->getCell("B".$j)->getValue();//获取B列的值
$sql = "INSERT INTO table VALUES(".$a.",".$b.")";
mysql_query($sql);

}

<?php
set_time_limit(20000);
ini_set('memory_limit','-1');
require_once './PHPExcel.php';
require_once './PHPExcel/IOFactory.php';
require_once './PHPExcel/Reader/Excel5.php';
 
//使用pdo连接数据库
$dsn = "mysql:host=localhost;dbname=alumni;";
$user = "root";
$password = "";
try{
 $dbh = new PDO($dsn,$user,$password);
 $dbh->query('set names utf8;');
}catch(PDOException $e){
 echo "连接失败".$e->getMessage();
}
//pdo绑定参数操作
$stmt = $dbh->prepare("insert into alumni(gid,student_no,name) values (:gid,:student_no,:name) ");
$stmt->bindParam(":gid", $gid,PDO::PARAM_STR);
$stmt->bindParam(":student_no", $student_no,PDO::PARAM_STR);
$stmt->bindParam(":name", $name,PDO::PARAM_STR);
 
$objReader = new PHPExcel_Reader_Excel5(); //use excel2007
$objPHPExcel = $objReader->load('bks.xls'); //指定的文件
$sheet = $objPHPExcel->getSheet(0);
$highestRow = $sheet->getHighestRow(); // 取得总行数
$highestColumn = $sheet->getHighestColumn(); // 取得总列数
 
for($j=1;$j<=10;$j++)
{
 
$student_no = $objPHPExcel->getActiveSheet()->getCell("A".$j)->getValue();//第一列学号
$name = $objPHPExcel->getActiveSheet()->getCell("B".$j)->getValue();//第二列姓名
$gid = $objPHPExcel->getActiveSheet()->getCell("C".$j)->getValue();//第三列gid
}
//将获取的excel内容插入到数据库
$stmt->execute();
?>

-- 数据库: `alumni`

-- 表的结构 `alumni`

CREATE TABLE IF NOT EXISTS `alumni` (

`id` bigint(20) NOT NULL AUTO_INCREMENT,

`gid` varchar(20) DEFAULT NULL COMMENT '档案编号',

`student_no` varchar(20) DEFAULT NULL COMMENT '学号',

`name` varchar(32) DEFAULT NULL,

PRIMARY KEY (`id`),

KEY `gid` (`gid`),

KEY `name` (`name`)

) ENGINE=MyISAM DEFAULT CHARSET=utf8;

<?php
header("Content-Type:text/html;charset=utf-8");
require_once 'excel_reader2.php';
set_time_limit(20000);
ini_set("memory_limit","2000M");
//使用pdo连接数据库
$dsn = "mysql:host=localhost;dbname=alumni;";
$user = "root";
$password = "";
try{
$dbh = new PDO($dsn,$user,$password);
$dbh->query('set names utf8;');
}catch(PDOException $e){
echo "连接失败".$e->getMessage();
}
//pdo绑定参数操作
$stmt = $dbh->prepare("insert into alumni(gid,student_no,name) values (:gid,:student_no,:name) ");
$stmt->bindParam(":gid", $gid,PDO::PARAM_STR);
$stmt->bindParam(":student_no", $student_no,PDO::PARAM_STR);
$stmt->bindParam(":name", $name,PDO::PARAM_STR);
//使用php-excel-reader读取excel内容
$data = new Spreadsheet_Excel_Reader();
$data->setOutputEncoding('UTF-8');
$data->read("stu.xls");
for ($i = 1; $i <= $data->sheets[0]['numRows']; $i++) {
for ($j = 1; $j <= 3; $j++) {
$student_no = $data->sheets[0]['cells'][$i][1];
$name = $data->sheets[0]['cells'][$i][2];
$gid = $data->sheets[0]['cells'][$i][3];
}
//将获取的excel内容插入到数据库
$stmt->execute();
}
echo "执行成功";
echo "最后插入的ID：".$dbh->lastInsertId();
?>