PHP入门学习的几个不错的实例代码

答案：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 * 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,php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,php 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,php 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,php判断表单是否提交 

<?php 

if ($submit) 

{} 

?> 

上一个：用php过滤危险html代码的函数
下一个：PHP 表单提交给自己