php常见错误小记

（1）Warning: mysqli_connect(): MySQL server has gone away in D:\Program Files (x86)\wamp\www\99pursey\conn\conn.php on line 3

Warning: mysqli_connect(): Error while reading greeting packet. PID=4980 in D:\Program Files (x86)\wamp\www\99pursey\conn\conn.php on line 3

Warning: mysqli_connect(): (HY000/2006): MySQL server has gone away in D:\Program Files (x86)\wamp\www\99pursey\conn\conn.php on line 3

Warning: mysql_select_db() expects parameter 2 to be resource, object given in D:\Program Files (x86)\wamp\www\99pursey\conn\conn.php on line 5

Warning: mysql_select_db() expects parameter 2 to be resource, object given

Warning: mysqli_query() expects at least 2 parameters, 1 given in

Warning: mysql_query() expects parameter 2 to be resource, object given in D:\Program Files (x86)\wamp\www\99pursey\left.php on line 29

解决方法：$conn=mysqli_connect("localhost:3306","root","") or die("数据库服务器连接错误".mysql_error());

     mysqli_select_db($conn,"db_pursey") or die("数据库访问错误".mysql_error());

     mysqli_query($conn,"set names gb2312");

（2）  Notice: Use of undefined constant edate - assumed 'edate' in D:\Program Files (x86)\wamp\www\99pursey\main.php on line 171

<td height="26">&nbsp;&nbsp;&nbsp;<span class="style5">&nbsp;<?php echo $ginfo['content'];?></span></td>

$ginfo[content]  加上双引号  $ginfo['content']