php怎样对mysql举行增删修查【php问题】,增删改查

以下代码时php在链接数据库，应用mysql操纵的四大功用：增编削查，源码以下：

衔接数据库

<?php
$conn=mysql_connect('localhost','root','');
if(!$conn){
echo "connect failed";
exit;
}
$sql='use student';
mysql_query($sql,$conn);

增添

$sql="insert into student(sname,sage) values('wx','18')";
$rs=mysql_query($sql,$conn);
if($rs){
    echo 'insert data success'."<br />";
}else{
    echo 'insert data failed'."<br />";
}

删除

$sql="delete from student where sname='li'";
$rs=mysql_query($sql,$conn);
if($rs){
    echo 'del data success'."<br />";
}else {
    echo 'del data failed'."<br />";    
}

修正

$sql="update student set sname='fu' where sname='pu'";
$rs=mysql_query($sql,$conn);
if($rs){
    echo 'update data success'."<br />";
}else{
    echo 'update data failed'."<br />";
}

查询

$sql="select * from student";
$rs=mysql_query($sql,$conn);
var_dump($rs);
while($row=mysql_fetch_object($rs)){
print_r($row);
echo '   ';
echo $row->sname ."<br>">;
}
?>

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