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php数据访问的

2024-08-18 04:11:13   219人阅读

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>

<body>
<?php

//建一个连接，造一个连接对象
$db = new MySQLi("localhost","root","123","mydb");

//判断是否出错
/*if(mysqli_connect_error())
{
    echo "连接失败！";
    exit;
}*/

mysqli_connect_error()?die("连接失败"):"";

//写SQL语句
$sql = "select * from Info";

//执行SQL语句，返回结果集对象
$reslut = $db->query($sql);

//从结果集中读取数据,返回数组
//$attr = $reslut->fetch_all(); //读取所有数据，返回索引二维数组

//$attr = $reslut->fetch_array(); //读取当前指针指向的数据，返回索引关联都存在的数组

//$attr = $reslut->fetch_assoc(); //返回关联数组

//$attr = $reslut->fetch_row(); //返回索引数组

//$attr = $reslut->fetch_object(); //返回对象
/*$arr = array();
while($attr = $reslut->fetch_row())
{
    array_push($arr,$attr);
}

var_dump($arr);*/











?>

</body>
</html>

下面是另一个

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>

<body>
<?php

//造连接对象
$db = new MySQLi("localhost","root","123","mydb");

//写SQL语句
$sql = "insert into info values(‘p003‘,‘张三‘,‘1‘,‘n001‘,‘1990-2-3‘)";

//执行SQL语句
$result = $db->query($sql);

/*if($result)
{
    echo "执行成功！";
}
else
{
    echo "执行失败！";
}*/

//$result->fetch_row();






?>
</body>
</html>

 

php数据访问的


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