Unable to load or find PHP extension php_intl.dll

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

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

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

To see why PHP cannot load extension php_intl.dll, open the command line, change to WAMP’s PHP directory, and test php_intl.dll’s dependencies:

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

This is a list of all the DLLs php_intl.dll must load, before it can be loaded itself:

# Core PHP DLL
php5ts.dll,OK

# International Components for Unicode (ICU) libraries - Unicode and Globalization support
icuuc51.dll,OK
icuin51.dll,OK
icuio51.dll,OK

# Microsoft VC++ 2012 Runtime libraries - common functions required by C and C++ programs
MSVCR110.dll,OK
MSVCP110.dll,OK

# Core Windows DLL
KERNEL32.dll,OK

The “ICU” and/or the” VC++ Runtime” DLLs will not be found (displayed as “NOTFOUND” instead of “OK”) on the system with this issue.

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 (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