The behaviour of these functions is affected by
settings in php.ini.
For further details and definitions of the PHP_INI_* modes, see the
configuration setting may be set.
Here’s a short explanation of the configuration
When this is turned on, PHP will be allowed to
operate as a D-COM (Distributed COM) client and will allow the PHP
script to instantiate COM objects on a remote server.
When this is turned on, PHP will attempt to
register constants from the typelibrary of COM objects that it instantiates, if those
objects implement the interfaces required to obtain that
information. The case sensitivity of the constants it registers is
controlled by the configuration directive.
When this is turned on, any problems with loading a
typelibrary during object instantiation will be reported using the
PHP error mechanism. The default is off, which does not emit any
indication if there was an error finding or loading the type
It controls the default character set code-page to
use when passing strings to and from COM objects. If set to an
empty string, PHP will assume that you want
CP_ACP, which is the default system
ANSI code page.
If the text in your scripts is encoded using a
different encoding/character set by default, setting this directive
will save you from having to pass the code page as a parameter to
the COM class
constructor. Please note that by using this directive (as with any
PHP configuration directive), your PHP script becomes less
portable; you should use the COM constructor parameter whenever
When set, this should hold the path to a file that
contains a list of typelibraries that should be loaded on startup.
Each line of the file will be treated as the type library name and
loaded as though you had called com_load_typelib(). The constants will be
registered persistently, so that the library only needs to be
loaded once. If a type library name ends with the string
#cis or #case_insensitive, then the constants
from that library will be registered case insensitively.