php 乱码问题分析

<?php教程
$DB_HOST = "localhost";  //数据库教程主机位置
$DB_LOGIN = "root";  //数据库的使用账号
$DB_PASSWORD = "admin";  //数据库的使用密码
$DB_NAME = "flag"; //数据库名称

$conn= mysql教程_connect($DB_HOST, $DB_LOGIN, $DB_PASSWORD);
mysql_select_db($DB_NAME);
?>

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<?php
functiondb_query($sqlstr) {returnmysql_query($sqlstr);}
functiondb_num_rows($res) {returnmysql_num_rows($res);}
functiondb_fetch_array($res) {returnmysql_fetch_array($res);}
functiondb_fetch_object($res) {returnmysql_fetch_object($res);}
functiondb_data_seek($res,$num){return mysql_data_seek($res,$num);}
functiondb_insert_id($res) {returnmysql_insert_id($res);}
?>

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<?
include("registry_up.htm") // 导入网页上半部
?>
<script>
functioncheck()
{
if(document.regstep1.username.value== "")
{
alert("未输入账号");
returnfalse;
}
if(document.regstep1.userpass.value== "")
{
alert("请勿使用空白密码");
returnfalse;
}
if(document.regstep1.userpass.value!= document.regstep1.userpass2.value)
{
alert("两次输入的密码不相同");
returnfalse;
}

document.regstep1.submit();

}
</script>

<script>
<!--------- 打开会员账号重复性检查功能页面的函数 BEGIN---------->
function Checkname(){
var Name = document.regstep1.username.value;
window.open("uniquecheck.php?name="+Name,"Check","width=300,height=10,status=0,scrollbars=0,resizable=1,menubar=0,toolbar=0,location=0");
}
<!---------- 打开会员账号重复性检查功能页面的函数 END----------->
</script>

<form name="regstep1"method="post" action="registry_do.php">
<?php /*?><inputtype="submit" name="username"value="<?=$username?>">
<inputtype="submit" name="userpass"value="<?=$userpass?>">
<inputtype="submit" name="pass_rem"value="<?=$pass_rem?>">
<inputtype="submit" name="pass_ans"value="<?=$pass_ans?>">
<?php */?>

<BR>
<table width="446" border="0"bordercolor="#000000" align="center"cellspacing="0">
<tr>
<td>
<table width="440" border="0"height="220" align="center" bgcolor="#EEEEEE" cellspacing="0"cellpadding="0">
<tr>
<td colspan="2" bgcolor="#FFFFFF">
<divalign="center"><img src="images/1.GIF"width="298" height="41"></div>
</td>
</tr>
<tr>
<td>
  <div align="center">账　　　号</div>
</td>
<td height="18">
<divalign="center">
<input type="text"name="username" size="15">
<inputonClick="网页特效:Checkname()" type=button value="检查账号"name="button">
  </div>
</td>
</tr>

<tr>
<td bgcolor="#FFFFFF">
<divalign="center">密　　　码</div>
</td>
<td height="6" bgcolor="#FFFFFF">
<div align="center">
<inputtype="password" name="userpass" size="20">
</div>
</td>
</tr>
<tr>
<td>
<divalign="center">密 码 确 认</div>
</td>
<td height="2">
<divalign="center">
<inputtype="password" name="userpass2" size="20">
</div>
</td>
</tr>
<tr>
<td bgcolor="#FFFFFF">
<divalign="center">密 码 提 示</div>
</td>
<td height="2" bgcolor="#FFFFFF">
<divalign="center">
<selectname="pass_rem">
<optionvalue="0">您宠物的名字</option>
<optionvalue="1">您最想去的国家</option>
  <optionvalue="2">您最喜欢的运动</option>
<optionvalue="3">您最讨厌的食物</option>
<optionvalue="4">您在家最常做什么</option>
<optionvalue="5">您最爱看的电影</option>
</select>
</div>
  </td>
</tr>
<tr>
<td>
<divalign="center">答　　　案</div>
</td>
<td height="2">
<divalign="center">
<input type="text"name="pass_ans" size="20">
</div>
</td>
</tr>
<tr>
<td colspan="2" bgcolor="#FFFFFF">
<divalign="center">
<inputtype="reset" name="reset" value="清除重填">
<inputtype="button" name="Submit" value="提交"onClick="check();">
</div>
</td>
</tr>
</table>
</td>
</tr>
</table>
</form>

<?
include("registry_down.htm") // 导入网页下半部
?>

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<?
include("db_conn.php");
include("db_func.php");

//增加会员账号/密码 BEGIN
$SQLStrUser= "INSERT INTO member (m_username, m_userpass, m_pass_rem, m_pass_ans)";
$SQLStrUser.= " VALUES('$username', '$userpass', '$pass_rem', '$pass_ans') ";
db_query($SQLStrUser);
//增加会员账号及密码 END

?>

<script>
alert("<?php echo "注册完成"; ?>");
  location.href = "www.111cn.net";
</script>

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<?
include("db_conn.php");
include("db_func.php");

//查询注册账号名称是否包含不雅字词 BEGIN
$SQLStr= "SELECT * FROM nogood WHERE n_name LIKE '%$username%'";
$res= db_query($SQLStr);
//查询注册账号名称是否包含不雅字词 END

if(db_num_rows($res)>0) // 若查询数据有相符
{
echo"<script>";
echo"alert("请勿使用不雅名称" . $username . "为账号");";
echo"location.href = "registry1.php";";
echo"</script>";
}
?>

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<?
include("db_conn.php");
include("db_func.php");

//查询数据库是否有此用户名称BEGIN
$sqlstr= "SELECT * FROM member WHERE m_username='$name'";
$res= db_query($sqlstr);
//查询数据库是否有此用户名称BEGIN

if(db_num_rows($res)>0) //检查查询结果是否有数据
  echo "<br><center>此账号名称" .$name. "已被注册使用</center>";
else
  echo "<br><center>此账号名称" .$name. "尚未有人注册使用</center>";
?>