(PHP 5 >= 5.3.2, PHP 7, PECL OCI8 >= 1.4.0)
oci_set_module_name — Sets the module name
$connection
, string $module_name
) : boolSets the module name for Oracle tracing.
The module name is registered with the database when the next 'round-trip' from PHP to the database occurs, typically when an SQL statement is executed.
The name can subsequently be queried from database administration views such as V$SESSION. It can be used for tracing and monitoring such as with V$SQLAREA and DBMS_MONITOR.SERV_MOD_ACT_STAT_ENABLE.
The value may be retained across persistent connections.
connectionOracle 连接标识，由 oci_connect()，oci_pconnect()，或 oci_new_connect() 返回。
module_nameUser chosen string up to 48 bytes long.
成功时返回 TRUE， 或者在失败时返回 FALSE。
Note: Oracle 版本需求
当 PHP 是与 Oracle 数据库 10g 及更新版本的 扩展库链接时，此函数可用。
使用旧版的 OCI8 或 ORACLE 数据库，可使用 Oracle DBMS_APPLICATION_INFO 包来设置客户端信息。这比使用 oci_set_client_info() 较低效。
一些 OCI8 函数会导致 Roundtrips. 对数据库来说当启用结果缓存时，查询可能不产生 Roundtrips。
Example #1 Setting the module name
<?php
$c = oci_connect('hr', 'welcome', 'localhost/XE');
// Record the module
oci_set_module_name($c, 'Home Page');
// Code that causes a round-trip, for example a query:
$s = oci_parse($c, 'select * from dual');
oci_execute($s);
oci_fetch_all($s, $res);
sleep(30);
?>
// While the script is running, the administrator can see the // modules in use: sqlplus system/welcome SQL> select module from v$session;