Mysql应用php mysql连接数据库实例

MYSQL入门
<?php
/* Connect to a MySQL server 连接数据库服务器 */
$link = mysqli_connect(
  'localhost', /* The host to connect to 连接MySQL地址 */
  'jian',   /* The user to connect as 连接MySQL用户名 */
  '123456', /* The password to use 连接MySQL暗码 */
  'jian');  /* The default database to query 连接数据库名称*/
if (!$link) {
  printf("Can't connect to MySQL Server. Errorcode: %s ", mysqli_connect_error());
  exit;
}else
  echo '数据库连接上了!';
/* Close the connection 关闭连接*/
mysqli_close($link);
?>

MYSQL入门
<?php
/* Connect to a MySQL server 连接数据库服务器 */
$link = mysqli_connect(
  'localhost', /* The host to connect to 连接MySQL地址 */
  'jian',   /* The user to connect as 连接MySQL用户名 */
  '123456', /* The password to use 连接MySQL暗码 */
  'jian');  /* The default database to query 连接数据库名称*/
if (!$link) {
  printf("Can't connect to MySQL Server. Errorcode: %s ", mysqli_connect_error());
  exit;
}else
  echo '数据库连接上了!'. "<br/>";
if ($result = mysqli_query($link, 'SELECT id,class,scores FROM jian_scores WHERE scores>60 ')) {
echo('id 班级 分数 '). "<br/>";
/* Fetch the results of the query 返回查询的结果 */
while( $row = mysqli_fetch_assoc($result) ){
  echo $row['id'], " ", $row['class'], " ", $row['scores'], "<br/>";
  // printf("%s (%s) ", $row['id'],$row['class'], $row['scores']);
}
/* Destroy the result set and free the memory used for it 结束查询释放内存 */
mysqli_free_result($result);
}
/* Close the connection 关闭连接*/
mysqli_close($link);
?>