封装函数增删改查
第一张表封装函数
<?php
define("HOST","127.0.0.1");//链接数据库
define("USER","root");//链接数据库
define("PWD","");//链接数据库密码
$conn="";
function get_conn(){//得到 $conn
global $conn;//调用$conn
$conn = mysql_connect(HOST,USER,PWD) or die(mysql_error());
mysql_select_db("test",$conn);
mysql_query("set names 'utf8'");
}
//插入方法
function insert($sql){
mysql_query($sql);
}
//更改数据
function update($sql){
mysql_query($sql);
}
//删除数据
function delete($sql){
mysql_query($sql);
}
//查询数据并显示
function select($sql){
$rut = mysql_query($sql);
while($row = mysql_fetch_array($rut)){
echo $row[0];
echo "<br>";
echo "<br>";
echo $row[1];
echo "<br>";
echo "<br>";
echo $row[2];
echo "<br>";
echo "<br>";
echo $row[3];
echo "<br>";
}
}
function close(){
global $conn;
mysql_close($conn);
}
?>
第二章表 调用函数
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/>
<body>
</body>
</head>
</html>
<?php
include"user.php";
get_conn();
//插入数据
//$sql =insert("INSERT INTO `user`(`id`, `userName`, `nickName`, `password`) VALUES (null,'安安','安安',123)");
//更新数据
// $sql = update("UPDATE `user` SET `id`=4,`userName`=888,`nickName`=888,`password`=888 WHERE id ='2'");
//删除数据
//$sql = delete("DELETE FROM `user` WHERE id = '12'");
//查询数据
$sql = select("SELECT * FROM `user`");
?>
