PHP学习笔记（三）php连接MySql数据库

php连接MySQL

error_reporting(E_ALL & ~E_DEPRECATED);
  header('Content-type:text/html;charset=utf8');
  $conn = mysql_connect('localhost','root','root')
  or die("<script>alert('连接MySQL失败，请重试！');</script>");
  mysql_set_charset('utf8');//5.5以下适用

php连接数据库

$select = mysql_select_db('student')
  or die("<script>alert('连接数据库失败，请重试！');</script>");

增删改查

$sql = "select * from student";
  $insert_sql = "insert into student values ('default','张三','23')";
  $update_sql = "update student set name = '李四' where id = 7";
  $delete_sql = "delete from student where id = 7";
  $query = mysql_query($insert_sql)//此时$query是一个数组
  or die("<script>alert('查询失败，请重试！');</script>");