win32 Apache is multithreaded.

May I ask how can I use dll extensions with php4/windows/apache configuration ?

sure. load them in php.ini. this is described in the manual, and the readme file that comes with the distro.

I was trying to load php4 extension libraries at startup (editing php.ini). However, none of the modules was loaded. the error log was :

 - One of the library files needed to run this application cannot be found.
 in Unknown on line 0
PHP Warning:  Unable to load dynamic library 'd:\php\extensions/php_ifx.dll' - O
ne of the library files needed to run this application cannot be found.
 in Unknown on line 0
PHP Warning:  Unable to load dynamic library 'd:\php\extensions/php_mssql65.dll'
 - One of the library files needed to run this application cannot be found.
 in Unknown on line 0
PHP Warning:  Unable to load dynamic library 'd:\php\extensions/php_oci8.dll' -
One of the library files needed to run this application cannot be found.
 in Unknown on line 0
PHP Warning:  Unable to load dynamic library 'd:\php\extensions/php_oracle.dll'
- One of the library files needed to run this application cannot be found.
 in Unknown on line 0
Cannot find module (IP-MIB): At line 0 in (none)
Cannot find module (IF-MIB): At line 0 in (none)
Cannot find module (TCP-MIB): At line 0 in (none)
Cannot find module (UDP-MIB): At line 0 in (none)
Cannot find module (SNMPv2-MIB): At line 0 in (none)
Cannot find module (SNMPv2-SMI): At line 0 in (none)
PHP Warning:  Unable to load dynamic library 'd:\php\extensions/php_sybase_ct.dl
l' - One of the library files needed to run this application cannot be found.
 in Unknown on line 0

I am sure that the path is correct (php is installed on d:/php, extensions in d:/php/extensions.)

This is how my php.ini file is configured :

;;;;;;;;;;;;;;;;;;;;;;;;;
; Paths and Directories ;
;;;;;;;;;;;;;;;;;;;;;;;;;
include_path	=                   ; UNIX: "/path1:/path2"  Windows: "\path1;\path2"
doc_root = "d:\programs"					; the root of the php pages, used only if nonempty
user_dir		=					; the directory under which php opens the script using /~username, used only if nonempty
extension_dir	= "d:\php\extensions"				; directory in which the loadable extensions (modules) reside
enable_dl		= On				; Whether or not to enable the dl() function.
									; The dl() function does NOT properly work in multithreaded
									; servers, such as IIS or Zeus, and is automatically disabled
									; on them.


;;;;;;;;;;;;;;;;
; File Uploads ;
;;;;;;;;;;;;;;;;
file_uploads	= On				; Whether to allow HTTP file uploads
;upload_tmp_dir	=	                ; temporary directory for HTTP uploaded files (will use system default if not specified)
upload_max_filesize = 2M		    ; Maximum allowed size for uploaded files


;;;;;;;;;;;;;;;;;;
; Fopen wrappers ;
;;;;;;;;;;;;;;;;;;
allow_url_fopen = On                ; Wheter to allow trating URLs like http:... or ftp:... like files


;;;;;;;;;;;;;;;;;;;;;;
; Dynamic Extensions ;
;;;;;;;;;;;;;;;;;;;;;;
; if you wish to have an extension loaded automaticly, use the
; following syntax:  extension=modulename.extension
; for example, on windows,
; extension=msql.dll
; or under UNIX,

; extension=msql.so

; Note that it should be the name of the module only, no directory information 
; needs to go here.  Specify the location of the extension with the extension_dir directive above.


;Windows Extensions
;Note that MySQL and ODBC support is now built in, so no dll is needed for it.
;

extension=php_bz2.dll
extension=php_cpdf.dll
extension=php_curl.dll
extension=php_cybercash.dll
extension=php_db.dll
extension=php_dba.dll
extension=php_dbase.dll
extension=php_domxml.dll
extension=php_dotnet.dll
extension=php_exif.dll
extension=php_fdf.dll
extension=php_filepro.dll
extension=php_gd.dll
extension=php_gettext.dll
extension=php_ifx.dll
extension=php_iisfunc.dll
extension=php_imap.dll
extension=php_interbase.dll
extension=php_java.dll
extension=php_ldap.dll
extension=php_mhash.dll
extension=php_mssql65.dll
extension=php_mssql70.dll
extension=php_oci8.dll
extension=php_openssl.dll
extension=php_oracle.dll
extension=php_pdf.dll
extension=php_pgsql.dll
extension=php_printer.dll
extension=php_sablot.dll
extension=php_snmp.dll
extension=php_sybase_ct.dll
extension=php_yaz.dll
extension=php_zlib.dll

The extensions that failed to load depend on external libraries that need to be in your system's path in order to be found. 

See http://bugs.php.net/?id=9037.

[Sun Jun 10 19:37:01 2001] [error] [client 127.0.0.1] PHP Warning:  Unable to lo
ad dynamic library 'c:\php/php_gd400.dll' - A device attached to the system is n
ot functioning.

[Sun Jun 10 19:37:02 2001] [error] [client 127.0.0.1]  in Unknown on line 0

Trying to use PHP_GD40x.dll but looks like I had this pb till I set up the 1.3.20 Apache Server.

Any idea how to work it out plz!

this is not support forum. Read the install.txt and
search the net with e.g. www.google.com and you will
find answers. No bugs.