PHP 5.4.33 Released

Windows 用 PHP 拡張モジュール

Windows に PHP を インストールし、Web サーバーの設定ができたら、 次は PHP 拡張モジュールを使うための設定です。 php.ini を使って PHP が起動時にロードする拡張モジュールを設定することができます。 もしくは、スクリプトの中で dl() 関数を使用することにより、 拡張モジュールを動的にロードすることも可能です。

PHP 拡張モジュールの DLL には、ファイル名の前に 'php_' が付いています。

Windows 版の PHP には、多くの拡張モジュールが 組み込まれています。これらの関数を使用する際には、 追加の DLL ファイルや extension ディレクティブの設定は不要です。 追加の DLL が必要となる (あるいはかつて必要だった) 拡張モジュールについては、 Windows 版 PHP 拡張モジュール の表にまとめてあります。以下にあげられている拡張モジュールは、すでに PHP に組み込まれています (PHP 5.0.4 時点): BCMath, Caledar, COM, Ctype, DOM, FTP, LibXML, Iconv, ODBC, PCRE, Session, SimpleXML, SPL, SQLite, WDDX, XML そして Zlib.

PHP が拡張モジュールを探すデフォルトの場所は C:\php5 です。 変更するには php.ini ファイルを編集してください。

  • extension_dir を拡張モジュール があるフォルダに変更する必要があります。 php_*.dllファイルをそこに置いてください。 例えば次のようになります。

    extension_dir = c:\php\extensions

  • php.ini には、多くの拡張モジュール名がコメントアウトされた状態で記載済みです。 それらの拡張モジュールを有効にするには、php.ini 上の extension=php_*.dll の行をアンコメント(行頭の ; を削除する)してください。

    例1 Windows 版の PHP で Bzip2 拡張モジュールを有効にする

    // この行を以下から
    ;extension=php_bz2.dll
    
    // このように変更する
    extension=php_bz2.dll

  • 拡張モジュールによっては、その動作に外部 DLL が必要な場合があります。 配布パッケージには、一部の外部 DLL がバンドルされています。 親フォルダを参照ください。ただし、必要な外部 DLL がバンドルされていないモジュールもあり、たとえば、Oracle モジュール (php_oci8.dll) は、非バンドルの DLL を必要とします。 また、忘れずに C:\php をシステムパスに 追加してください(その方法は、別途 FAQ に記載されています。)

  • これらの DLLs の中には、PHP の配布ファイルに含まれていないものもあります。 詳細は、それぞれの拡張モジュールのドキュメントを参照ください。 また、PECL についての詳細は、マニュアルの PECL 拡張モジュールのインストール という節を参照ください。多くの PHP 拡張モジュールが PECL に移行しつつあり、これらは 個別にダウンロード しなければなりません。

注意: PHP をサーバーモジュールとして実行している場合は、Webサーバーを再起動しないと、 php.ini の設定が反映されません。Web サーバーの再起動を忘れずに行ってください。

以下の表は、使用可能な拡張モジュールと それらの実行に別途必要な DLL のリストです。

PHP 拡張モジュール
拡張モジュール 説明 備考
php_bz2.dll bzip2 圧縮関数  
php_calendar.dll カレンダー 関数  
php_crack.dll Crack 関数  
php_ctype.dll 文字型(ctype) 関数  
php_curl.dll CURL, Client URL Library 関数 libeay32.dll および ssleay32.dll が必要 (バンドル)
php_dba.dll DBA: (dbm 型の) データベース・アブストラクション レイヤー関数  
php_dbase.dll dBase 関数  
php_dbx.dll dbx 関数  
php_exif.dll EXIF 関数 php_mbstring.dllphp.iniphp_exif.dllphp_mbstring.dll の後で読み込まれる必要がある。
php_fbsql.dll FrontBase 関数  
php_fdf.dll FDF: Forms Data Format 関数 fdftk.dll が必要 (バンドル)
php_filepro.dll filePro 関数 読み込みのみ
php_ftp.dll FTP 関数  
php_gd2.dll イメージ 関数 (GD2 ライブラリ) GD2
php_gettext.dll Gettext 関数 PHP <= 4.2.0 では gnu_gettext.dll が必要 (バンドル), PHP >= 4.2.3 では libintl-1.dll および iconv.dll が必要(バンドル)
php_hyperwave.dll HyperWave 関数  
php_iconv.dll ICONV 関数 iconv-1.3.dll が必要(バンドル)、 iconv.dll
php_ifx.dll Informix 関数 Informix ライブラリが必要
php_iisfunc.dll IIS management 関数  
php_imap.dll IMAP,POP3,NNTP 関数  
php_ingres.dll Ingres 関数 Ingres ライブラリが必要
php_interbase.dll InterBase 関数 gds32.dll が必要(バンドル)
php_ldap.dll LDAP 関数 libeay32.dllssleay32.dll が必要(バンドル)
php_mbstring.dll マルチバイト文字列 関数  
php_mcrypt.dll Mcrypt 暗号化 関数 libmcrypt.dll が必要
php_mhash.dll Mhash 関数 libmhash.dll が必要(バンドル)
php_mime_magic.dll Mimetype 関数 magic.mime が必要(バンドル)
php_ming.dll Ming 関数 (Flash 用)  
php_msql.dll mSQL 関数 msql.dll が必要(バンドル)
php_mssql.dll MSSQL 関数 ntwdblib.dll が必要(バンドル)
php_mysql.dll MySQL 関数 libmysql.dll が必要(バンドル)
php_mysqli.dll MySQLi 関数 libmysql.dll (PHP <= 5.0.2 では libmysqli.dll) が必要(バンドル)
php_oci8.dll Oracle 8 関数 Oracle 8.1+ クライアントライブラリが必要
php_openssl.dll OpenSSL 関数 libeay32.dll が必要(バンドル)
php_pdf.dll PDF 関数  
php_pgsql.dll PostgreSQL 関数  
php_shmop.dll 共有メモリ 関数 (shmop)  
php_snmp.dll SNMP 関数 NT のみ
php_soap.dll SOAP 関数  
php_sockets.dll ソケット 関数  
php_sybase_ct.dll Sybase 関数 Sybase クライアントライブラリが必要
php_tidy.dll Tidy 関数  
php_tokenizer.dll Tokenizer 関数  
php_w32api.dll W32api 関数  
php_xmlrpc.dll XML-RPC 関数 iconv.dll が必要(バンドル)
php_xslt.dll XSLT 関数 sablot.dll, expat.dll および iconv.dll が必要(バンドル)
php_yaz.dll YAZ 関数 yaz.dll が必要(バンドル)
php_zip.dll Zip ファイル 関数 読込のみ
php_zlib.dll ZLib 圧縮関数  

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User Contributed Notes 11 notes

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3
JB
5 years ago
I had a problem with the gd and mysqli mods on my PHP5.2/Apache2.2/Windows 2003 server. Even after enabling the options in the php.ini file and restarting the Apache service, the mods still would not load. I even tried to restart the Windows 2003 server that php is loaded on - and no go. After reviewing the system path variables in Windows, I noticed that the c:\php directory was set in the path variable, but not the folder for the gd, mysqli and others mods. So I added c:\php\ext to the path variable and rebooted the server. THAT FIXED IT!!
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2
smaines at alaya dot com
6 years ago
== Problem

Consider the following from an httpd.conf file...

  LoadModule php5_module "E:/xyz/php/php5apache2_2.dll"
  PHPIniDir "E:/xyz/php"

...which led to the dreaded...

  PHP Warning:  PHP Startup: Unable to load dynamic library 'E:\\xyz\\php\\ext\\php_mysql.dll' - The specified module could not be found.

Note, however, that PHP.exe apparently was found and executed php pages in Apache, but the MySQL functions therein failed.

== Solution

Because PHP dir was not in $PATH, php5apache2_2.dll failed to find php_mysql.dll (the only extension I enabled) during Apache 2.2 start.

== Caveat (!)

The BIG issue is that, setting $PATH in...

  <desk icon>My Computer
  <rt click>Properties
  <tab>Advanced
  <button>Environment Variables

...didn't export the $PATH change such that restarting the Apache service (in MMC) would pick it up.  So I tested the working solution (adding PHP dir to $PATH), but it failed because of HOW I set it. It succeeded only when I REBOOTED after changing the $PATH.  There may be an easier way that this, but I do not know it at present.

== Comment

Consider whether PHP dir should need to be in $PATH at all, when PHP.exe apparently was found and executes php pages in Apache, but php5apache2_2.dll failed to find whatever was needed to load the extensions.  This should perhaps be addressed.

Note that on a WAMP installation (W2K,Apache,MySQL,PHP), only PHP is required in $PATH.
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2
simi_def at c2 dot hu
8 years ago
I had problems with PHP5/Apache2.2/MySQL 5 installation on a WinXp machine.

I got the

Fatal error: call to undefined function - mysql_connect().

message

Solution :
1, use correct version of ext\php_mysql.dll and libmysql.dll
2, !!! edit the CORRECT php.ini (%windir%\php.ini) like c:\windows\php.ini !!!
3, add php installation dir to PATH
4, edit php.ini to load extension php_mysql.dll

use
<?php
phpinfo
();
?>
to check.
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1
amainATgoldcoastdesignORG
5 years ago
I just recently tried to upgrade my php install on WinXP using the php-5.2.6-win32-installer.msi and with fingers crossed, tried to see if things still worked or not.

Unfortunately, they didn't.  I did see many posts here and elsewhere on the web regarding the error message:

"Unable to load dynamic link library 'ext\php_xxxxx.dll' - The specified module could not be found."

php.net says in the past when upgrading to simply copy over new php files, but now recommends using the windows installer.  Maybe the installer isn't quite up to the task yet.

My fix:

1. Completely uninstall current version of php (using Windows Control Panel > Add or Remove Programs).

2. Download the current php binaries for Windows (at php.net/downloads.php under Windows Binaries).  Should be format: PHP 5.x.x zip package.  Again, download the binaries, NOT the installer.

3. Follow these easy steps
http://www.ricocheting.com/server/php.html

4. Set your PATH for Windows to find php (if you haven't already):
a. Right-click on My Computer
b. Properties
c. Advanced Tab > Environment Variables
d. Under System variables, scroll down to find "Path", select and click on Edit
e. Add path to your php install on the end (make sure to precede with semi-colon ";").  Mine was ";G:\Apache\php"
f. Click Okay.  (then "Okay" on each of the other open windows).

5. Test php install. (see ricocheting link above for testing).

6. Getting the extensions to work again:
a. Open php.ini
b. uncomment each extension, restart Apache.

7. Special note on libmysql.dll and problems getting MySQL to work:
- You may have copied over this file into your Windows/System32 (or WINNT/System32 for me) to get mysql to work in the past.  If so, replace it with the most recent version you get with the upgrade (in top dir).
- If this is a fresh install, copy the libmysql.dll into your System32 folder.

Couple notes:
1. The above tutorial link is to install php 5.x on Apache 2.2 for Win.  If you're running Apache 2.0 like me, pay special attention to "Editing Apache Conf File" for correct LoadModule info.
2. If you ran the installer previously, double check your Apache conf where the php5 LoadModule stuff is.  The installer might have messed with this a bit.

I hope this stuff helps.
-Art
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1
JerryG
7 years ago
Installing PHP extensions for IIS for the first time is sort of a baptism by fire -- you will get your hands dirty, and other suitable metaphors of nastiness.  Hopefully, you won't have to spend too many days googling around fora and restarting IIS 10 million times as I did until I finally realized both what was going on and what crazy things I'd done wrong.

THIS (peter)guy really goes into terrific detail and troubleshooting, (with very good reasons and explanations of extension dependencies not listed on the current php page you're now reading):

http://www.peterguy.com/php/install_IIS6.html

Most of this is applicable for IIS5.1 as well, as far as I've found.

The main problem I'd been butting my head up against was extensions being reported as not found, even though the .DLLs were definitely in C:\PHP\ext, and my PATH env var was setup correctly. 

The error messaging during dynamic loading of implicitly-linked libraries should be more specific, telling you that in fact it is a particular dependency of a dependency which is missing -- usually some obscure third-party .dll -- and name it!

Eventually I stopped being so greedy and just cut down on the extensions I thought I needed by commenting them out in php.ini.  That eliminated the startup errors.  Apparently some of these extensions or their requirements, which either come with the base PHP install zip or the PECL extensions, are either too obscure or too fragile to be necessary anyway.

Good luck, and I hope anyone who runs into the same trouble can hit upon this or Peter Guy's page directly before they go too crazy.
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1
Anonymous
4 years ago
I had problem with extensions - they don't loaded (without errors) on Windows installation and don't displayed in phpinfo().

Solve: full-specified directory name for extension_dir directive - "c:/php/ext/" instead "./"
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1
mech
7 months ago
If you have problems, that windows-extensions can not be loaded (PHP Warning: PHP Startup: Unable to load dynamic library) and you are sure, the .ddl is in the right place, use ProcessMonitor (http://technet.microsoft.com/de-de/sysinternals/bb896645.aspx)

here you can see at startup, which files php tries to find and in which locations php tries to find them!
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0
jma59 at cam dot ac dot uk
7 years ago
Under windows, given an error similar to

PHP Warning:  PHP Startup: Unable to load dynamic library 'c:\\php\\ext\\php_mysql.dll' - The specified module could not be found.\r\n in Unknown on line 0

When PHP definitely should be able to find the module, it's fairly common knowledge that this error can also be caused by  certain dlls not being in the PATH. These dlls (usually libeay32 and ssleay32) are generally found in your base php directory, and the modern windows installers add the base php directory to the PATH so that you don't need to worry about it. However, if when installing earlier versions you decided on moving libeay32, ssleay32 et al to C:\Windows\System32 instead of changing the PATH, then php will still end up with the old versions and the out of date versions will cause the same error as above. Don't fall into the trap like I did.
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-1
Manda Krishna Srikanth
6 years ago
As far as my experience says, 95% of ext\php_mysql.dll - The specified module could not be found - error can be sorted out on Win 2003, IIS 6, PHP5.2.

Replace the php_mysql.dll and libmysql.dll downloaded from http://dev.mysql.com/downloads/connector/php/ into extensions directory.

For MSSQL connectivity problems, replace the ntwdblib.dll in php dir with the one copied from system32 directory. Ofcourse the filesize will be less, no problem, replace it.
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rafaurl at gmail dot com
3 years ago
I got the following error:

PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\PHP\ext\php_curl.dll'

By using sysinternals procmon I saw that it failed after trying to load "zlib.dll". I found this file deployed with other software (in my case, Miranda IM) and copied it to the PHP installation directory. It worked fine after that. Hope that helps.
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-1
vatozana at yahoo dot com
3 years ago
I had problems registering Curl extentions and it was cause by the old dll of libeay32.dll and  ssleay32.dll  which were already in my c:\windows\system32 I replaced them and all is now fine!!
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