Php-rdkafka: php_rdkafka.dll is not a valid Win32 application (64 bit)

[aand18]

Trying to run the x64 build but php doesn't recognise the DLL as valid:

PHP Warning: PHP Startup: Unable to load dynamic library 'php_rdkafka.dll' (tried: C:/php-7.2.2-nts-Win32-VC15-x64/extphp_rdkafka.dll (%1 is not a valid Win32 application.
), C:/php-7.2.2-nts-Win32-VC15-x64/extphp_php_rdkafka.dll.dll (The specified module could not be found.
)) in Unknown on line 0

Using:

• http://windows.php.net/downloads/pecl/snaps/rdkafka/3.0.5/php_rdkafka-3.0.5-7.2-nts-vc15-x64.zip
• http://windows.php.net/downloads/releases/php-7.2.2-nts-Win32-VC15-x64.zip
• VC++ redistributable 2017 installed for both x86 and x64
• librdkafka.dll (file bundled with the PHP module) in System32 folder
• OS is Windows Server 2012 R2 x64

The same setup works using the x86 builds !

[nick-zh]

@aand18 do you still need help with this? Also this part in the error strikes me as a bit odd, the naming seems kind of messed up:

php_php_rdkafka.dll.dll (The specified module could not be found.

[inri13666]

Have the same issue, but found the reason.
Please check that your PHP root folder contain librdkafka.dll (./ext/.../librdkafka.dll)