先问一个关于乱码的问题，
在my.ini中设置了 [client] default-character-set=utf8 [mysqld] default-character-set=utf8 然后重启wamp，phpmyadmin就连接不上了，就是#2002 那个套接字错误提示，然后我就把my.ini刚做的修改又改了回去，还是连接不上，（我把修改撤销了应该可以了呀？？问题1）最后把localhost改为127.0.0.1 才恢复正常
问题二： 上述操作之后
最后问题
1、conn文件
<?php
$conn = mysql_connect("localhost","root","") or die("Can't connect database: ".mysql_error());
if($conn)
echo "链接成功！";
mysql_select_db("liuyan");
mysql_query("set names 'gbk'");
?>2、input文件
<form name = "msgform" method = "post" action = "write.php" enctype = "multipart/form-data" onsubmit = "return checkMessage()">
//javascript略去了
<table width = "64%" border = "0" cellspacing = "1" cellpadding = "3" bgcolor = "#66CCFF" align = "center">
<tr>
<td width = "48%">用 户：
<input type = "txet" name = "username">
</td>
</tr>
<tr>
<td colspan = "2">标 题：
<input type = "text" name = "title" size = "60" maxlength = "50">
</td>
</tr>
<tr>
<td colspan = "2">
<textarea name = "content" rows = "10" cols = "100"></textarea>
</td>
</tr>
<tr>
<td>
<div align = "right">
<input type = "submit" name = "sub" value = "提交">
</div>
</td>
<td>
<input type = "reset" name = "Rewrite" value = "重写">
</td>
</tr>
</table>
</form>3、write文件
<?php
include("conn.php");
if(isset($_POST['username'])){
$username = $_POST['username'];
$title = $_POST['title'];
$content = $_POST['content'];
$sql = "insert into easy values('$username','$title','$content',now())";
mysql_query($sql) or die("插入失败: ".mysql_error());
}
?>
<?php
include("conn.php");
$rowsPerPage = 10;
$row = mysql_fetch_array(mysql_query("select count (*) as c from easy")); //查询总记录数...这点书上看的，不太懂，求解释
$rows = $row['c']; //得到记录数
/*
$a = "select * from easy";
$b = mysql_query($a);
$rows = mysql_num_rows($b);
这个可以么？ 另外这个和上面那个有什么区别？？
*/
$pages = ceil($rows/$rowsPerPage); //计算页数
$curPage = 1;
if(isset($_REQUEST['curPage']))
$curPage = $_REQUEST['curPage'];
$sql = "select * from easy order by posttime" ." limit ".($curPage - 1) * $rowsPerPage." ,$rowsPerPage";
$result = mysql_query($sql) or die(mysql_error());
while($row = mysql_fetch_array($result)){ echo "<table width = 90% align=center cellpadding=5 cellspacing=1 bgcolor=blue>";
echo "<tr>";
echo "<td rowspan = 2 width = 25% bgcolor = white>";
echo "<tr>标题：<?=$row[title]?></tr>";
echo "<li>用户：<?=$row[username]?>";
echo "<li> <?= $row[posttime]?>";
echo "</td>";
echo "<td>内容：<?= $row[content]?></td>";
echo "</tr>";
echo "</table>";
echo "<br>";
}
//分页链接
echo "<div align = center>";
for($i = 1;$i<$pages;$i++)
echo "<a href = 'write.php?curPage = $i'>$i</a>$nbsp; ";
echo "</div>";
?>奉上全部的分了
在my.ini中设置了 [client] default-character-set=utf8 [mysqld] default-character-set=utf8 然后重启wamp，phpmyadmin就连接不上了，就是#2002 那个套接字错误提示，然后我就把my.ini刚做的修改又改了回去，还是连接不上，（我把修改撤销了应该可以了呀？？问题1）最后把localhost改为127.0.0.1 才恢复正常
问题二： 上述操作之后
最后问题
1、conn文件
<?php
$conn = mysql_connect("localhost","root","") or die("Can't connect database: ".mysql_error());
if($conn)
echo "链接成功！";
mysql_select_db("liuyan");
mysql_query("set names 'gbk'");
?>2、input文件
<form name = "msgform" method = "post" action = "write.php" enctype = "multipart/form-data" onsubmit = "return checkMessage()">
//javascript略去了
<table width = "64%" border = "0" cellspacing = "1" cellpadding = "3" bgcolor = "#66CCFF" align = "center">
<tr>
<td width = "48%">用 户：
<input type = "txet" name = "username">
</td>
</tr>
<tr>
<td colspan = "2">标 题：
<input type = "text" name = "title" size = "60" maxlength = "50">
</td>
</tr>
<tr>
<td colspan = "2">
<textarea name = "content" rows = "10" cols = "100"></textarea>
</td>
</tr>
<tr>
<td>
<div align = "right">
<input type = "submit" name = "sub" value = "提交">
</div>
</td>
<td>
<input type = "reset" name = "Rewrite" value = "重写">
</td>
</tr>
</table>
</form>3、write文件
<?php
include("conn.php");
if(isset($_POST['username'])){
$username = $_POST['username'];
$title = $_POST['title'];
$content = $_POST['content'];
$sql = "insert into easy values('$username','$title','$content',now())";
mysql_query($sql) or die("插入失败: ".mysql_error());
}
?>
<?php
include("conn.php");
$rowsPerPage = 10;
$row = mysql_fetch_array(mysql_query("select count (*) as c from easy")); //查询总记录数...这点书上看的，不太懂，求解释
$rows = $row['c']; //得到记录数
/*
$a = "select * from easy";
$b = mysql_query($a);
$rows = mysql_num_rows($b);
这个可以么？ 另外这个和上面那个有什么区别？？
*/
$pages = ceil($rows/$rowsPerPage); //计算页数
$curPage = 1;
if(isset($_REQUEST['curPage']))
$curPage = $_REQUEST['curPage'];
$sql = "select * from easy order by posttime" ." limit ".($curPage - 1) * $rowsPerPage." ,$rowsPerPage";
$result = mysql_query($sql) or die(mysql_error());
while($row = mysql_fetch_array($result)){ echo "<table width = 90% align=center cellpadding=5 cellspacing=1 bgcolor=blue>";
echo "<tr>";
echo "<td rowspan = 2 width = 25% bgcolor = white>";
echo "<tr>标题：<?=$row[title]?></tr>";
echo "<li>用户：<?=$row[username]?>";
echo "<li> <?= $row[posttime]?>";
echo "</td>";
echo "<td>内容：<?= $row[content]?></td>";
echo "</tr>";
echo "</table>";
echo "<br>";
}
//分页链接
echo "<div align = center>";
for($i = 1;$i<$pages;$i++)
echo "<a href = 'write.php?curPage = $i'>$i</a>$nbsp; ";
echo "</div>";
?>奉上全部的分了
2、数据库服务是公共的，任何的总体配置的改变，必然会影响到其他应用的使用
3、任何配置信息的改变，都只会影响改变时刻以后的表现。而改变时刻之前保存的数据有可能会出问题
4、有人说用 ALTER 改变字符集时，可以同时对内容的字符集做转换处理。但至少在我用的 mysql 中是不可以的建议你恢复原始的配置文件，这样才有利于问题的解决
设置字段的字符集和适时的使用 set names 指令，是正确的做法
因为你的项目很可能会运行在一个已有的环境中。如程序依赖外部配置，那么后果是可想而知的