PHP入門學習的幾個不錯的執行個體代碼

1,php串連資料庫

<?php

$dbhost = 'localhost';
$dbuser = 'root'; //你的mysql使用者名稱
$dbpass = '123456'; //你的mysql密碼
$dbname = 'data'; //你的mysql庫名

//串連本機資料庫
$GLOBALS["conn"] = mysql_connect($dbhost,$dbuser,$dbpass);

//開啟資料庫
mysql_select_db($dbname,$GLOBALS["conn"]);

?>

2.php讀取資料庫中,某一欄位值

<?php

//讀取一列資料
$sql="select * from ec_admin";
$result = mysql_query($sql,$GLOBALS["conn"]);

printf("使用者名稱: %s<br>\n", mysql_result($result,3,"UserName"));
printf("密碼: %s<br>\n", mysql_result($result,3,"UserPass"));

?>

3,php插入某一條資料

<?php

$sql="insert into ec_admin(UserName,UserPass) values('liugongxun2','jakemary2')";
$result=mysql_query($sql,$GLOBALS["conn"])or die(mysql_error());

?>

4,php while迴圈

<?php

$sql="select * from ec_admin";
$result = mysql_query($sql,$GLOBALS["conn"]);
while($myrow = mysql_fetch_row($result))
{
printf("使用者名稱%s %s密碼<br />",$myrow[1],$myrow[2]);
}

?>

5,php do while迴圈

<?php

$sql="select * from ec_admin";
$result = mysql_query($sql,$GLOBALS["conn"]);
if($myrow = mysql_fetch_array($result))
{
do
{
printf("使用者名稱%s %s密碼<br />",$myrow["UserName"],$myrow["UserPass"]);
}while($myrow = mysql_fetch_array($result));
}
?>

6,php判斷表單是否提交

<?php

if ($submit)

{}

?>