


An example of php simply reading mysql, phpmysql example
Reading mysql database
Example.
Copy the code as follows
$link=mysql_connect("localhost","root","previous administrator password");
if(!$link) echo " No connection successful!";
mysql_select_db("infosystem", $link); //Select database
$q = "SELECT * FROM info"; //SQL query statement
mysql_query("SET NAMES GB2312 ");
$rs = mysql_query($q); //Get the data set
if(!$rs){die("Valid result!");}
echo "
Department name | Employee name | PC name |
$row[1] | $row[2] | $row[3]
mysql_free_result($rs); //Close the data set
?>
Chinese display garbled problem
When we access the MySQL database through PHP in the original way, even if we set the default character set of the table to utf8 and send the query through UTF-8 encoding, you will find that the data stored in the database is still garbled.
In fact, the simplest way (www.111cn.net) is to set it up through phpMyAdmin.
Set the following items:
1: The language is set to chinese (zh-utf-8)
2: MySQL character set: UTF-8 Unicode (utf8)
3: MySQL connection proofreading: utf8_general_ci
4: When adding a new database and data table, select utf8_general_ci
With the above settings, Chinese characters will not be garbled when operating and querying in phpMyAdmin.
But you will find that the results obtained by using the previous SQL statement in the PHP program are still garbled. The problem lies in the connection layer.
The solution is to send a query statement after successfully connecting to the database:
Copy the code as follows
1: $this->LinkID = mysql_connect($this->Host, $this->User, $this->Password);
2: mysql_query( 'SET NAMES 'utf8'', $this->LinkID);
or:
DEFINE ('LINK', mysql_connect (DB_HOST, DB_USER, DB_PASSWORD));
mysql_query("SET NAMES 'utf8'", LINK);
gbk encoded
Copy the code as follows
$mysql_mylink = mysql_connect($mysql_host, $mysql_user, $mysql_pass);
mysql_query("SET NAMES 'GBK'");
from:http:/ /www.111cn.net/phper/php-database/57069.htm
if(isset($ _POST['tj']))//If you click submit
{
$conn=mysql_connect("localhost","username","password");
mysql_select_db("eastses" ,$conn);
mysql_query("set names utf8",$conn);
date_default_timezone_set("asia/chongqing");
$sql = "INSERT INTO `eastses`.`classmate` (` id`, `name`, `nickname`, `birthday`, `home`, `blood`, `qq`, `weibo`, `email`, `phone`, `hobby`, `food`, `sentence` , `gift`, `lover`, `keenon`, `unforgettable`, `wanttobecome`, `ideal`, `other`) VALUES ('".$_POST['id']."', '".$_POST ['name']."', '".$_POST['nickname']."', '".$_POST['birthday']."', '".$_POST['home']."' , '".$_POST['blood']."', '".$_POST['qq']......The rest of the text>>
If your database is set up, it’s easy. Use PHP to connect to your database!
$link = mysql_connect('localhost','user','pwd');//Your database username and password
mysql_query('set names utf8'); Set character set
mysql_select_db(' db');//Select your database
$sql="Here is your sql statement";
mysql_query($sql);//Send sql statement
mysql_close();//Close the connection

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。


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