Unable to load or find PHP extension php_intl.dll

Posted: 2014-09-26 22:29:47

PHP says it can’t find extension php_intl.dll, yet file "php_intl.dll" does exist in the specified location!…

PHP Startup: Unable to load dynamic library ‘C:/wamp/path/to/php/ext/php_intl.dll’ – The specified module could not be found.

This is a very common issue, especially under PHP 5.5, and can easily be fixed.

To find out why PHP cannot load extension php_intl.dll, open the command line, change to WAMP’s PHP directory, and test the php_intl.dll dependencies (i.e., the other DLL files it needs):

cd  \WampDeveloper\Components\Php
deplister.exe ext\php_intl.dll

This is a list of all the DLL files php_intl.dll must load itself, before PHP can load it:

# Core PHP DLL

# International Components for Unicode (ICU) libraries - Unicode and Globalization support

# Microsoft VC++ 2012 Runtime libraries - common functions required by C and C++ programs

# Core Windows DLL

On a system with this issue, either the “ICU” or the “VC++ Runtime” DLL files will not be found (i.e., shown as “NOTFOUND” instead of “OK” in the above output).

And when php_intl.dll is not able to find and load these dependencies, PHP outputs:

"The specified module could not be found."

Here is how to fix the issue and load php_intl.dll:

1. Make sure the PHP directory path is included in the system’s PATH environmental variable so this set of provided/included ICU DLLs, that php_intl.dll depends on, are found:

icuuc51.dll, icuin51.dll, icuio51.dll

* WampDeveloper Pro already includes PHP’s directory in PATH, but some other WAMP distributions do not.

2. Install the Microsoft VC++ 2012 Runtime Redistributable that will provide these VC11 runtime DLLs that php_intl.dll depends on (PHP 5.5 is built with VS.NET 2012):

MSVCR110.dll, MSVCP110.dll

Visual C++ Redistributable for Visual Studio 2012 Update 4

Make sure to install the 32 bit (x86) version if you are using a 32 bit PHP build: vcredist_x86.exe

* Unlike PHP 5.5, PHP 5.3 is built with VS.NET 2008 (VC9), and depends on “Visual C++ Redistributable for Visual Studio 2008″ which provides runtime DLLs: MSVCR90.dll, MSVCP90.dll