再续mysql编码问题

　　　　　　　　　　　　+   mysql5.1.3(my.ini--->character_set_server=utf8)

编译安装php5.3.0　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

以上表示：两个不同的php环境，一个编译安装一个yum安装，版本相同，在使用mysql_connect()方法连接同一个mysql时，

在不设置mysql_query("set names utf")或mysql_set_charset("utf8")的前提下，它们默认使用的连库编码是不一样的

<?<span style="color: #000000;">php
</span><span style="color: #800080;">$link</span>=<span style="color: #008080;">mysql_connect</span>("localhost") or <span style="color: #0000ff;">die</span>(<span style="color: #008080;">mysql_error</span><span style="color: #000000;">());<br>
</span><span style="color: #800080;">$res</span>=<span style="color: #008080;">mysql_query</span>("show variables like ‘%char%‘"<span style="color: #000000;">);<br>
</span><span style="color: #0000ff;">while</span>(<span style="color: #800080;">$arr</span>=<span style="color: #008080;">mysql_fetch_assoc</span>(<span style="color: #800080;">$res</span><span style="color: #000000;">)){
    </span><span style="color: #008080;">var_dump</span>(<span style="color: #800080;">$arr</span><span style="color: #000000;">);
}</span>

yum版php

<span style="color: #0000ff;">array</span>
  ‘Variable_name‘ => <span style="color: #0000ff;">string</span> ‘character_set_client‘ (length=20<span style="color: #000000;">)
  </span>‘Value‘ => <span style="color: #0000ff;">string</span> ‘latin1‘ (length=6<span style="color: #000000;">)
</span><span style="color: #0000ff;">array</span>
  ‘Variable_name‘ => <span style="color: #0000ff;">string</span> ‘character_set_connection‘ (length=24<span style="color: #000000;">)
  </span>‘Value‘ => <span style="color: #0000ff;">string</span> ‘latin1‘ (length=6<span style="color: #000000;">)
</span><span style="color: #0000ff;">array</span>
  ‘Variable_name‘ => <span style="color: #0000ff;">string</span> ‘character_set_database‘ (length=22<span style="color: #000000;">)
  </span>‘Value‘ => <span style="color: #0000ff;">string</span> ‘utf8‘ (length=4<span style="color: #000000;">)
</span><span style="color: #0000ff;">array</span>
  ‘Variable_name‘ => <span style="color: #0000ff;">string</span> ‘character_set_filesystem‘ (length=24<span style="color: #000000;">)
  </span>‘Value‘ => <span style="color: #0000ff;">string</span> ‘binary‘ (length=6<span style="color: #000000;">)
</span><span style="color: #0000ff;">array</span>
  ‘Variable_name‘ => <span style="color: #0000ff;">string</span> ‘character_set_results‘ (length=21<span style="color: #000000;">)
  </span>‘Value‘ => <span style="color: #0000ff;">string</span> ‘latin1‘ (length=6<span style="color: #000000;">)
</span><span style="color: #0000ff;">array</span>
  ‘Variable_name‘ => <span style="color: #0000ff;">string</span> ‘character_set_server‘ (length=20<span style="color: #000000;">)
  </span>‘Value‘ => <span style="color: #0000ff;">string</span> ‘utf8‘ (length=4<span style="color: #000000;">)
</span><span style="color: #0000ff;">array</span>
  ‘Variable_name‘ => <span style="color: #0000ff;">string</span> ‘character_set_system‘ (length=20<span style="color: #000000;">)
  </span>‘Value‘ => <span style="color: #0000ff;">string</span> ‘utf8‘ (length=4)

手动编译版php

<span style="color: #0000ff;">array</span>
  ‘Variable_name‘ => <span style="color: #0000ff;">string</span> ‘character_set_client‘ (length=20<span style="color: #000000;">)
  </span>‘Value‘ => <span style="color: #0000ff;">string</span> ‘utf8‘ (length=4<span style="color: #000000;">)
</span><span style="color: #0000ff;">array</span>
  ‘Variable_name‘ => <span style="color: #0000ff;">string</span> ‘character_set_connection‘ (length=24<span style="color: #000000;">)
  </span>‘Value‘ => <span style="color: #0000ff;">string</span> ‘utf8‘ (length=4<span style="color: #000000;">)
</span><span style="color: #0000ff;">array</span>
  ‘Variable_name‘ => <span style="color: #0000ff;">string</span> ‘character_set_database‘ (length=22<span style="color: #000000;">)
  </span>‘Value‘ => <span style="color: #0000ff;">string</span> ‘utf8‘ (length=4<span style="color: #000000;">)
</span><span style="color: #0000ff;">array</span>
  ‘Variable_name‘ => <span style="color: #0000ff;">string</span> ‘character_set_filesystem‘ (length=24<span style="color: #000000;">)
  </span>‘Value‘ => <span style="color: #0000ff;">string</span> ‘binary‘ (length=6<span style="color: #000000;">)
</span><span style="color: #0000ff;">array</span>
  ‘Variable_name‘ => <span style="color: #0000ff;">string</span> ‘character_set_results‘ (length=21<span style="color: #000000;">)
  </span>‘Value‘ => <span style="color: #0000ff;">string</span> ‘utf8‘ (length=4<span style="color: #000000;">)
</span><span style="color: #0000ff;">array</span>
  ‘Variable_name‘ => <span style="color: #0000ff;">string</span> ‘character_set_server‘ (length=20<span style="color: #000000;">)
  </span>‘Value‘ => <span style="color: #0000ff;">string</span> ‘utf8‘ (length=4<span style="color: #000000;">)
</span><span style="color: #0000ff;">array</span>
  ‘Variable_name‘ => <span style="color: #0000ff;">string</span> ‘character_set_system‘ (length=20<span style="color: #000000;">)
  </span>‘Value‘ => <span style="color: #0000ff;">string</span> ‘utf8‘ (length=4)

通过phpinfo()查看两个不同php环境的编译参数，找到问题原因：

yum版的php中

--with-mysql=shared,/usr‘ ‘--with-mysqli=shared,/usr/lib64/mysql/mysql_config‘

这两个函数库默认调用的是MySQL客户端库(By default the MySQL database extensions are configured to use MySQL Client Library直译)的，这个时候Linux上是需要安装mysql，但是

编译版php

--with-mysql=mysqlnd --with-mysqli=mysqlnd --with-pdo-mysql=mysqlnd 

用的是mysqlnd（具体作用baidu,google）

两者最大的区别在于：mysqlnd连接数据库时，默认使用的是mysql服务器端show global variables like "%char%"显示的编码

而另一个始终是使用latin1做为连的库的编码，相当于无形中，一直设置了一个"set names latin1"

再续mysql编码问题

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