1,php连接数据库

<?php

$dbhost='localhost';
$dbuser='root';//你的mysql用户名
$dbpass='123456';//你的mysql密码
$dbname='data';//你的mysql库名

//连接本地数据库
$GLOBALS["conn"]=mysql_connect($dbhost,$dbuser,$dbpass);

//打开数据库
mysql_select_db($dbname,$GLOBALS["conn"]);

?>

2.php读取数据库中,某一字段值

<?php

//读取一列数据
$sql="select*fromec_admin";
$result=mysql_query($sql,$GLOBALS["conn"]);

printf("用户名:%s<br>\n",mysql_result($result,3,"UserName"));
printf("密码:%s<br>\n",mysql_result($result,3,"UserPass"));

?>

3,php插入某一条数据

<?php

$sql="insertintoec_admin(UserName,UserPass)values('liugongxun2','jakemary2')";
$result=mysql_query($sql,$GLOBALS["conn"])ordie(mysql_error());

?>

4,php while循环

<?php

$sql="select*fromec_admin";
$result=mysql_query($sql,$GLOBALS["conn"]);
while($myrow=mysql_fetch_row($result))
{
printf("用户名%s%s密码<br/>",$myrow[1],$myrow[2]);
}

?>

5,php dowhile循环

<?php

$sql="select*fromec_admin";
$result=mysql_query($sql,$GLOBALS["conn"]);
if($myrow=mysql_fetch_array($result))
{
do
{
printf("用户名%s%s密码<br/>",$myrow["UserName"],$myrow["UserPass"]);
}while($myrow=mysql_fetch_array($result));
}
?>

6,php判断表单是否提交

<?php

if($submit)

{}

?>