错误提示：ocilogon(): ORA-12154: TNS:could not resolve the connect identifier specifie!
操作系统：Win7
本地环境：xampp-win32-1.8.2-1-VC9 、 Oracle 10g。
PHP连接测试代码：
[php]
ocilogon('emesc','emesc','mesb');
//print_r(oci_error());
?>
ocilogon('emesc','emesc','mesb');
//print_r(oci_error());
?>结果发现提示：ocilogon(): ORA-12154: TNS:could not resolve the connect identifier specifie!
原因分析：之前通过自己配置tnsnames.ora和环境变量来使用PL/SQL，导致安装oracle客户端的时候环境变量异常。导致PHP无法解析连接字符串。
解决方案：在系统中添加：名为TNS_ADMIN的环境变量：D:\oracle\product\10.2.0\db_1\network\ADMIN。测试连接成功！
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