PHP入门学习实例代码，代码例子

1,

 

<?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)

{}

?>