PHP入门

1,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.读取数据库中,某一字段值

<?php

//读取一列数据

$sql="select * from ec_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,插入某一条数据

<?php

$sql="insert into ec_admin(UserName,UserPass) values('liugongxun2','jakemary2')";

$result=mysql_query($sql,$GLOBALS["conn"])or die(mysql_error());

?>

4,while循环

<?php

$sql="select * from ec_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,do while循环

<?php

$sql="select * from ec_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,判断表单是否提交

<?php

if ($submit)

{}

?>