php连接Oracle，提示CalltoundefinedfunctionOra_Logon(),该如何解决

php连接Oracle，提示Call to undefined function Ora_Logon()
按照资料写的一小段代码


if ($conn=Ora_Logon( "hr@TNSNAME ", "hr "))
{
echo "SUCCESS ! Connected to database\n ";
}
else
{
echo "Failed :-( Could not connect to database\n ";}
Ora_Logoff($conn);
phpinfo();
?>

提示 Ora_Logon函数为定义，为什么？

我在php.ini里面已经把extension=php_oci8.dll的分号去掉
并且把php_oci8.dll考入windows/system32里面了。

------解决方案--------------------
不是你这样就可以安装好Oracle的扩展的……


而且ora_logon属于CXIII. Oracle 函数（已废弃）

你一要用 CVII. Oracle 函数

http://cn.php.com/manual/zh/ref.oci8.php
------解决方案--------------------
Did you config your php with Oracle while installing it? Please check below

./configure --prefix=/appbin/php --with-apxs2=/appbin/apache/bin/apxs --with-oci8=$ORACLE_HOME

$ORACLE_HOME is path which your Oracle clinet/server located,

then 用oci_connect() or 用oci_newconnect(),Please check php doc for detail