PHP 5 连接 mysql 5的认证协议问题

韩冰

<><FONT color=#f70909>来源：LinuxAid</FONT> </P>
<>MYSQL 4.1以后, 采用了一种新的用户认证<a href="http://hackbase.com/network/protocol" target="_blank" >协议</A>, 对于老的客户端会出现不支持认证<a href="http://hackbase.com/network/protocol" target="_blank" >协议</A>的错误, 以下是官方网站的解决方法 r 　　 </P>
. v3 w1 @# c+ z& B( r<>　　１Upgrade all client programs to use a 4.1.1 or newer client library. 　　 </P>
<>　　更新客户端库，这需要更新ＰＨＰ的扩展库，对于老的ａｐｉ　ＰＨＰ已经不提供了这样的扩展库了 　　 </P>
' X- _- ]/ G7 n- J2 N1 Y  u7 M<>　　２When connecting to the server with a pre-4.1 client program, use an account that still has a pre-4.1-style password. 　　 </P>
. `4 D+ O; F! R<>　　使用以前建立的账号连接，对于在新的认证<a href="http://hackbase.com/network/protocol" target="_blank" >协议</A>下建立的<a href="http://hackbase.com/skill" target="_blank" >账户</A>就不行了 　　 </P>
<>　　３Reset the password to pre-4.1 style for each user that needs to use a pre-4.1 client program. This can be done using the SET PASSWORD statement and the OLD<a href="http://www1.hackbase.com/network/server/200501209617.htm#" target="_blank" >_</A>ASSWORD() function: my<a href="http://hackbase.com/hacker" target="_blank" >sql</A>&gt; SET PASSWORD FOR </P>
7 ^. f; o6 a$ O<>　　-&gt; <a href=" target="_blank" >_</A>user'@'some<a href="http://www1.hackbase.com/network/server/200501209617.htm#" target="_blank" >_</A>host'"&gt;'some<a href="http://www1.hackbase.com/network/server/200501209617.htm#" target="_blank" >_</A>user'@'some<a href="http://www1.hackbase.com/network/server/200501209617.htm#" target="_blank" >_</A>host'</A> = OLD<a href="http://www1.hackbase.com/network/server/200501209617.htm#" target="_blank" >_</A>ASSWORD('newpwd'); 　　 </P>
<>　　Alternatively, use UPDATE and FLUSH PRIVILEGES: my<a href="http://hackbase.com/hacker" target="_blank" >sql</A>&gt; UPDATE my<a href="http://hackbase.com/hacker" target="_blank" >sql</A>.user SET Password = OLD<a href="http://www1.hackbase.com/network/server/200501209617.htm#" target="_blank" >_</A>ASSWORD('newpwd') -&gt; WHERE Host = 'some<a href="http://www1.hackbase.com/network/server/200501209617.htm#" target="_blank" >_</A>host' AND User = 'some<a href="http://www1.hackbase.com/network/server/200501209617.htm#" target="_blank" >_</A>user'; </P>
) w& |+ l& X6 J<>　　my<a href="http://hackbase.com/hacker" target="_blank" >sql</A>&gt; FLUSH PRIVILEGES; 　　 </P>
<>　　Substitute the password you want to use for ``newpwd'' in the preceding examples. MySQL cannot tell you what the original password was, so you'll need to pick a new one. 　 </P>
; N3 b1 G& Z& Y- j8 p) s  u<>　　这是一个不错的办法，新建立的账号采用老式的加密<a href="http://hackbase.com/network/protocol" target="_blank" >协议</A> 　　 </P>
8 r  E6 f3 Z1 A8 B% F<>　　４Tell the server to use the older password hashing algorithm: </P>
<>　　Start my<a href="http://hackbase.com/hacker" target="_blank" >sql</A>d with the --old-passwords option. 　 </P>
<>　　这样新认证<a href="http://hackbase.com/network/protocol" target="_blank" >协议</A>的优点就没法使用了 　　 </P>
! k- V# c% O0 J* B9 u<>　　５Assign an old-format password to each account that has had its password updated to the longer 4.1 format. You can identify these accounts with the following query: my<a href="http://hackbase.com/hacker" target="_blank" >sql</A>&gt; SELECT Host, User, Password FROM my<a href="http://hackbase.com/hacker" target="_blank" >sql</A>.user </P>
<>　　-&gt; WHERE LENGTH(Password) &gt; 16; 　　 </P>
% u0 n2 p2 w- A7 G) q<>　　For each account record displayed by the query, use the Host and User values and assign a password using the OLD<a href="http://www1.hackbase.com/network/server/200501209617.htm#" target="_blank" >_</A>ASSWORD() function and either SET PASSWORD or UPDATE, as described earlier. 　　 </P>
<>　　恢复已经升级了口令到老样式 　　 </P>
" j- \2 S/ Q/ Y, t: M( ?2 ^% O<>　　本文参照了　<a href="http://dev.my<a%20href=/" target="_blank" >sql</A>.com/doc/my<a href="http://hackbase.com/hacker" target="_blank" >sql</A>/en/Old<a href="http://www1.hackbase.com/network/server/200501209617.htm#" target="_blank" >_</A>client.html"&gt;http://dev.my<a href="http://hackbase.com/hacker" target="_blank" >sql</A>.com/doc/my<a href="http://hackbase.com/hacker" target="_blank" >sql</A>/en/Old<a href="http://www1.hackbase.com/network/server/200501209617.htm#" target="_blank" >_</A>client.html</A> </P>
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