使用过phpMyAdmin的人知道，在phpMyAdmin中，使用文件config.inc.php保存用户名和密码，当需要更换用户或用户口令更改时，必须修改config.inc.php文件，然后再上传，特别的不方便。更有时，为了修改MYSQL库或表而使用root账号，如果这时其它网站的自动搜擎系统搜索到index.php并继续执行其中的每一步的话，是相当危险的。为此需要用户登陆机制，在每次使用时，输入用户名和口令，这样会安全得多。
以下是我在管理过程中，根据实际需要，对phpMyAdmin做的一些更改，为了尽量不影响原来phpMyAdmin的结构，我在phpMyAdmin的基础上增加了一个文件index0.php，仅仅修改了一个文件config.inc.php，对phpMyAdmin没有一点影响，既可以使用原来的phpMyAdmin，也可以使用新的用户口令登陆机制。
以下为两个文件列表，将这两个文件拷贝到phpMyAdmin目录，执行index0.php即可，该程序在Apache + PHP + MYSQL 和 IIS5 + PHP + MYSQl 和 PWS + PHP + MYSQL下正常执行。
phpMyAdmin 下载：
A set of PHP3-scripts to adminstrate MySQL over the WWW.
Version 2.1.0 - 08/06/2000
http://www.phpwizard.net/projects/phpMyAdmin/
index0.php文件：
<html><head><title>MySQL 维护</title></head><body>
<!--
<?php
//编码，防止在地址栏上显示
function b2h($string) {
return(bin2hex(strrev($string)));
}
//反编码，防止在地址栏上显示
function h2b($string) {
$stringtmp="";
for($i=0;$i<strlen($string);$i+=2) {
$stringtmp .= pack("C",hexdec(substr($string,$i,2)));
}
return(strrev($stringtmp));
}
global $PHP_SELF;
if (1==0) {
echo "-->PHP运行不正常，请检查<!--";
} else {
echo "--".">";
}
?>
<?php
if ($step=="") {
?>
<p>欢迎使用</p>本工具用于维护MySQL数据库</p>
<p><a href="<? echo basename($PHP_SELF); ?>?step=2">下一步 -></a></p>
<?php
}
if ($step==2) {
$userfiletmp="/tmp/~userfile/~tmp.inc";
if (file_exists($userfiletmp)) {
include $userfiletmp;
//$dbservertype,$servername,$dbusername,$dbpassword,$dbname;
$dbservertype=h2b($dbservertype);
$servername=h2b($servername);
$dbusername=h2b($dbusername);
$dbname=h2b($dbname);
$curtime=h2b($curtime);
if (time()-$curtime<120){
$dbpassword=h2b($dbpassword);
}else{
$dbpassword="";
}
}else{
$dbservertype="mysql";
$servername="localhost";
$dbusername="";
$dbpassword="";
$dbname="";
}
$dbservertype=($dbservertype==""?"mysql":$dbservertype);
$servername=($servername==""?"localhost":$servername);
?>
<p>填入连接信息</p></p>
<div align="center">
<center>
<table border="1" width="53%" height="111">
<tr>
<td width="100%" height="105">
<form method="POST" action="<? echo basename($PHP_SELF); ?>?step=3">
<div align="center">
<center>
<table border="1" width="83%" height="60">
<tr>
<td width="34%" height="10">主机类型：</td>
<td width="66%" height="10"><input type="text" name="dbservertype" size="20" value="<? echo $dbservertype; ?>"></td>
</tr>
<tr>
<td width="34%" height="10">主机地址：</td>
<td width="66%" height="10"><input type="text" name="servername" size="20" value="<? echo $servername; ?>"></td>
</tr>
<tr>
<td width="34%" height="10">用户名称：</td>
<td width="66%" height="10"><input type="text" name="dbusername" size="20" value="<? echo $dbusername; ?>"></td>
</tr>
<tr>
<td width="34%" height="16">密码：</td>
<td width="66%" height="16"><input type="password" name="dbpassword" size="20" value="<? echo $dbpassword; ?>"></td>
</tr>
<tr>
<td width="34%" height="16">数据库名：</td>
<td width="66%" height="16"><input type="text" name="dbname" size="20" value="<? echo $dbname; ?>"></td>
</tr>
</table>
</center>
</div>
<p align="center"><input type="submit" value="下一步" name="next"><input type="reset" value="清 除" name="reset"></p>
</form>
</td>
</tr>
</table>
</center>
</div>
<?php
}
if ($step==3) {
$dbservertype=trim($dbservertype);
$servername=trim($servername);
$dbusername=trim($dbusername);
$dbpassword=trim($dbpassword);
$dbname=trim($dbname);
echo "<p>确认是否正确：</p>n";
echo "<p><b>Database server type:</b> $dbservertype</p>n";
echo "<p><b>Database server hostname / IP address:</b> $servername</p>n";
echo "<p><b>Database username:</b> $dbusername</p>n";
echo "<p><b>Database password:</b> ******</p>n";
echo "<p><b>Database name:</b> $dbname</p>n";
echo "<p>以上参数正确才能继续</p>";
$dbservertype=b2h($dbservertype);
$servername=b2h($servername);
$dbusername=b2h($dbusername);
$dbpassword=b2h($dbpassword);
$dbname=b2h($dbname);
$userfiletmp="/tmp/~userfile/~tmp.inc";
if (!file_exists(dirname($userfiletmp))) {
mkdir(dirname($userfiletmp), 0700);
}
$handertmp=fopen($userfiletmp,"w");
fputs($handertmp,"<?phpn");
fputs($handertmp,"$"."dbservertype="$dbservertype";n");
fputs($handertmp,"$"."servername="$servername";n");
fputs($handertmp,"$"."dbusername="$dbusername";n");
fputs($handertmp,"$"."dbpassword="$dbpassword";n");
fputs($handertmp,"$"."dbname="$dbname";n");
$curtime=time();
$curtime=b2h($curtime);
fputs($handertmp,"$"."curtime="$curtime";n");
fputs($handertmp,"?>n");
fclose($handertmp);
//echo "<p><a href="".basename($PHP_SELF)."?step=4&servername=$servername&dbusername=$dbusername&dbpassword=$dbpassword&dbname=$dbname">下一步 -></a></p>";
echo "<p><a href="index.php">下一步 -></a></p>";
}
if ($step==4) {
}
if ($step==44) {
$step=0;
$userfiletmp="/tmp/~userfile/~tmp.inc";
if (file_exists($userfiletmp)) {
include $userfiletmp;
//重新保存文件，去掉密码
$dbpassword="";
$handertmp=fopen($userfiletmp,"w");
fputs($handertmp,"<?phpn");
fputs($handertmp,"$"."dbservertype="$dbservertype";n");
fputs($handertmp,"$"."servername="$servername";n");
fputs($handertmp,"$"."dbusername="$dbusername";n");
fputs($handertmp,"$"."dbpassword="$dbpassword";n");
fputs($handertmp,"$"."dbname="$dbname";n");
$curtime=time();
$curtime=b2h($curtime);
fputs($handertmp,"$"."curtime="$curtime";n");
fputs($handertmp,"?>n");
fclose($handertmp);
echo "</p></p><center><a href="".basename($PHP_SELF)."">成功注销，请重新登陆</a></center>";
}
}
?>
<?php
if ($step>1) {
echo "</p><a href=javascript:location.reload()>刷新</a>";
echo " <a href=javascript:history.back()>上一步</a>";
}
?>
<?php
echo "</"."body>";
echo "<"."!--";
?>
-->
</html>
config.inc.php 文件
<?php
/* $Id: config.inc.php,v 1.28 2000/07/13 13:52:48 tobias Exp $ */
//编码，防止在地址栏上显示
function b2h($string) {
return(bin2hex(strrev($string)));
}
//反编码，防止在地址栏上显示
function h2b($string) {
$stringtmp="";
for($i=0;$i<strlen($string);$i+=2) {
$stringtmp .= pack("C",hexdec(substr($string,$i,2)));
}
return(strrev($stringtmp));
}
/*
* phpMyAdmin Configuration File
* All directives are explained in Documentation.html
*/
// The $cfgServers array starts with $cfgServers[1]. Do not use $cfgServers[0].
// You can disable a server config entry by setting host to ''.
$cfgServers[1]['host'] = 'localhost'; // MySQL hostname
$cfgServers[1]['port'] = ''; // MySQL port - leave blank for default port
$cfgServers[1]['adv_auth'] = false; // Use advanced authentication?
$cfgServers[1]['stduser'] = 'root'; // MySQL standard user (only needed with advanced auth)
$cfgServers[1]['stdpass'] = ''; // MySQL standard password (only needed with advanced auth)
$cfgServers[1]['user'] = 'root'; // MySQL user (only needed with basic auth)
$cfgServers[1]['password'] = ''; // MySQL password (only needed with basic auth)
$cfgServers[1]['only_db'] = ''; // If set to a db-name, only this db is accessible
$cfgServers[1]['verbose'] = ''; // Verbose name for this host - leave blank to show the hostname
$userfiletmp="/tmp/~userfile/~tmp.inc";
if (file_exists($userfiletmp)) {
include $userfiletmp;
//$servername,$dbusername,$dbpassword,$dbname;
$dbservertype=h2b($dbservertype);
if ($dbservertype=="mysql"){
$servername=h2b($servername);
$dbusername=h2b($dbusername);
$dbpassword=h2b($dbpassword);
$dbname=h2b($dbname);
$curtime=h2b($curtime);
if (time()-$curtime<600){
$cfgServers[1]['host'] = $servername; // MySQL hostname
$cfgServers[1]['user'] = $dbusername; // MySQL user (only needed with basic auth)
$cfgServers[1]['password'] = $dbpassword; // MySQL password (only needed with basic auth)
$cfgServers[1]['only_db'] = $dbname; // If set to a db-name, only this db is accessible
//重新保存文件，以便更新时间
$dbservertype=b2h($dbservertype);
$servername=b2h($servername);
$dbusername=b2h($dbusername);
$dbpassword=b2h($dbpassword);
$dbname=b2h($dbname);
$handertmp=fopen($userfiletmp,"w");
fputs($handertmp,"<?phpn");
fputs($handertmp,"$"."dbservertype="$dbservertype";n");
fputs($handertmp,"$"."servername="$servername";n");
fputs($handertmp,"$"."dbusername="$dbusername";n");
fputs($handertmp,"$"."dbpassword="$dbpassword";n");
fputs($handertmp,"$"."dbname="$dbname";n");
$curtime=time();
$curtime=b2h($curtime);
fputs($handertmp,"$"."curtime="$curtime";n");
fputs($handertmp,"?>n");
fclose($handertmp);
}else{
echo "</p>账号参数已经过期，请重新输入！</p>";
echo "<a href="index0.php" target="_top">登陆</a>";
die("</p><b>程序终止</b>");
}
}
}
$cfgServers[2]['host'] = '';
$cfgServers[2]['port'] = '';
$cfgServers[2]['adv_auth'] = false;
$cfgServers[2]['stduser'] = '';
$cfgServers[2]['stdpass'] = '';
$cfgServers[2]['user'] = '';
$cfgServers[2]['password'] = '';
$cfgServers[2]['only_db'] = '';
$cfgServers[2]['verbose'] = '';
$cfgServers[3]['host'] = '';
$cfgServers[3]['port'] = '';
$cfgServers[3]['adv_auth'] = false;
$cfgServers[3]['stduser'] = '';
$cfgServers[3]['stdpass'] = '';
$cfgServers[3]['user'] = 'root';
$cfgServers[3]['password'] = '';
$cfgServers[3]['only_db'] = '';
$cfgServers[3]['verbose'] = '';
// If you have more than one server configured, you can set $cfgServerDefault
// to any one of them to autoconnect to that server when phpMyAdmin is started,
// or set it to 0 to be given a list of servers without logging in
// If you have only one server configured, $cfgServerDefault *MUST* be
// set to that server.
$cfgServerDefault = 1; // Default server (0 = no default server)
$cfgServer = '';
unset($cfgServers[0]);
$cfgManualBase = "http://www.mysql.com/documentation/mysql/bychapter/";
$cfgConfirm = true;
$cfgPersistentConnections = false;
$cfgBorder = "0";
$cfgThBgcolor = "#D3DCE3";
$cfgBgcolorOne = "#CCCCCC";
$cfgBgcolorTwo = "#DDDDDD";
$cfgMaxRows = 30;
$cfgMaxInputsize = "300px";
$cfgOrder = "ASC";
$cfgShowBlob = true;
$cfgShowSQL = true;
require("chinese_gb.inc.php");
$strWelcome="<a href="index0.php?step=44" target="_top">注销账户</a> <a href="index0.php" target="_top">重新登陆</a></p>$strWelcome";
$cfgColumnTypes = array(
"TINYINT",
"SMALLINT",
"MEDIUMINT",
"INT",
"BIGINT",
"FLOAT",
"DOUBLE",
"DECIMAL",
"DATE",
"DATETIME",
"TIMESTAMP",
"TIME",
"YEAR",
"CHAR",
"VARCHAR",
"TINYBLOB",
"TINYTEXT",
"TEXT",
"BLOB",
"MEDIUMBLOB",
"MEDIUMTEXT",
"LONGBLOB",
"LONGTEXT",
"ENUM",
"SET");
$cfgFunctions = array(
"ASCII",
"CHAR",
"SOUNDEX",
"CURDATE",
"CURTIME",
"FROM_DAYS",
"FROM_UNIXTIME",
"NOW",
"PASSWORD",
"PERIOD_ADD",
"PERIOD_DIFF",
"TO_DAYS",
"USER",
"WEEKDAY",
"RAND");
$cfgAttributeTypes = array(
"",
"BINARY",
"UNSIGNED",
"UNSIGNED ZEROFILL");
// Setting magic_quotes_runtime - do not change!
set_magic_quotes_runtime(0);
?>