PHP mysql基础操作

mysql连接操作

//建立连接
$con = mysql_connect(‘localhost‘, ‘root‘, ‘123456‘);
//判断是否连接成功
if($con){
die(‘连接失败!‘.mysql_error());
exit;
}

//选择字符集
mysql_set_charset(‘utf8‘, $con);
//选择数据库
mysql_select_db(‘test‘, $con);

$sql = ‘.........................‘;

//执行sql语句
$result = mysql_query($sql, $con);

//如果是插入操作
mysql_affected_rows() 获取影响行数
mysql_insert_id() 获取新插入的ID

//如果是查询操作
while($row = mysql_fetch_assoc($result)){
echo ‘<pre>‘;
var_dump($row);
echo ‘</pre>‘;
}

//关闭数据库
mysql_close($con);

 1 //数据库连接
 2   function mysqlConnect(){
 3     $con = mysql_connect("localhost", "root", "");
 4     if(!$con){
 5         die("连接失败!".mysql_error());
 6         exit;
 7     }
 8
 9     mysql_set_charset("utf8", $con);
10     mysql_select_db("ms", $con);
11
12     /*
13     $sql = "select * from user;";
14     $result = mysql_query($sql);
15
16     if(mysql_num_rows($result)){
17         while($rows = mysql_fetch_assoc($result)){
18             echo ‘<pre>‘;
19             var_dump($rows);
20             echo ‘</pre>‘;
21         }
22     }
23     */
24
25     $sql = "insert into user (username) values (‘test123‘)";
26     $result = mysql_query($sql);
27
28     if($result && mysql_affected_rows()>0){
29         echo "插入成功!".mysql_insert_id();
30     }
31
32     mysql_close($con);
33   }