在 Windows 中运行 PHP：如何解决“PHP 启动：无法加载动态库”问题？

Question

I have determined path to php folder and trying to run some php file and getting this message from command line.

Microsoft Windows [Version 6.3.9600]
(c) 2013 Microsoft Corporation. All rights reserved.

C:\Users\U1>php
Failed loading \usr\local\php5\ext\php_xdebug-2.2.0-5.3-vc9.dll
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_curl.dll' - The specified module could not be found.
 in Unknown on line 0
<!--error-->
Warning: PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\
php_curl.dll' - The specified module could not be found.
 in Unknown on line 0
<script language=JavaScript src='/denwer/errors/phperror_js.php'></script>PHP Wa
rning:  PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_gd2
.dll' - The specified module could not be found.
 in Unknown on line 0
<!--error-->
Warning: PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_gd
2.dll' - The specified module could not be found.
 in Unknown on line 0
<script language=JavaScript src='/denwer/errors/phperror_js.php'></script>PHP Wa
rning:  PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_mbstring.dll' - The specified module could not be found.
 in Unknown on line 0
<!--error-->
Warning: PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_mb
string.dll' - The specified module could not be found.
 in Unknown on line 0
<script language=JavaScript src='/denwer/errors/phperror_js.php'></script>PHP Wa
rning:  PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_mysql.dll' - The specified module could not be found.
 in Unknown on line 0
<!--error-->
Warning: PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_my
sql.dll' - The specified module could not be found.
 in Unknown on line 0
<script language=JavaScript src='/denwer/errors/phperror_js.php'></script>PHP Wa
rning:  PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_mys
qli.dll' - The specified module could not be found.
 in Unknown on line 0
<!--error-->
Warning: PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_my
sqli.dll' - The specified module could not be found.
 in Unknown on line 0
<script language=JavaScript src='/denwer/errors/phperror_js.php'></script>PHP Wa
rning:  PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_pdo
_mysql.dll' - The specified module could not be found.
 in Unknown on line 0
<!--error-->
Warning: PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_pd
o_mysql.dll' - The specified module could not be found.
 in Unknown on line 0
<script language=JavaScript src='/denwer/errors/phperror_js.php'></script>PHP Wa
rning:  PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_pdo
_sqlite.dll' - The specified module could not be found.
 in Unknown on line 0
<!--error-->
Warning: PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_pd
o_sqlite.dll' - The specified module could not be found.
 in Unknown on line 0
<script language=JavaScript src='/denwer/errors/phperror_js.php'></script>PHP Wa
rning:  PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_sql
ite.dll' - The specified module could not be found.
 in Unknown on line 0
<!--error-->
Warning: PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_sq
lite.dll' - The specified module could not be found.
 in Unknown on line 0
<script language=JavaScript src='/denwer/errors/phperror_js.php'></script>PHP Wa
rning:  PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_soa
p.dll' - The specified module could not be found.
 in Unknown on line 0
<!--error-->
Warning: PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_so
ap.dll' - The specified module could not be found.
 in Unknown on line 0
<script language=JavaScript src='/denwer/errors/phperror_js.php'></script>PHP Wa
rning:  PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_sql
ite3.dll' - The specified module could not be found.
 in Unknown on line 0
<!--error-->
Warning: PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_sq
lite3.dll' - The specified module could not be found.
 in Unknown on line 0
<script language=JavaScript src='/denwer/errors/phperror_js.php'></script>PHP Wa
rning:  PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\php_xsl
.dll' - The specified module could not be found.
 in Unknown on line 0
<!--error-->
Warning: PHP Startup: Unable to load dynamic library '/usr/local/php5/ext\
php_xsl.dll' - The specified module could not be found.
 in Unknown on line 0
<script language=JavaScript src='/denwer/errors/phperror_js.php'></script>
^A

All libraries are open on php.ini file. I have checked them all. I am wondering why command line tries to run library in incorrect path like

'/usr/local/php5/ext\php_xsl.dll'

Does it should be like

'/usr/local/php5/ext/php_xsl.dll'

?

Answer 1

Open your php.ini file and set the following setting to a Windows file path:

extension_dir = "X:/path/to/your/php/ext"

On Windows, paths that point to something on a normal hard drive have to start with a letter and then a colon, like " C: ". Paths that start with a forward slash, / , are Unix-like paths, and will not work on Windows.

Answer 2

Adjust the following value in php.ini:

; Directory in which the loadable extensions (modules) reside.
extension_dir = "C:\path to extension directory"

Answer 3

You can also specify the extensions directory without using the full path if it's in the same folder, at least in PHP 7.2.5 (have not tested other versions).

Example:

extension_dir = "ext"

Where ext is your extensions directory.

Answer 4

Check the dll / library path from the error and make sure it's correct. Updating /php.ini-> extension_dir to the correct path solves my problem.

Answer 5

I have 7.4 php version. I solved this by uncommenting the following line by removing; inside the php.ini file.

extension_dir = "ext"

Note that initially, if you won't have php.ini file you should first copy and paste php.ini-development file and rename it as php.ini.