Hi,
For WampServer the Loader is a PHP engine extension, so should be referenced with
a zend_extension line in a php.ini file.
The Loader must be for the correct operating system, match the
PHP version, and for whether PHP is built as Thread-Safe (TS).
Download Ioncube Windows VC15 (64 bits) or Windows VC15 (32 bits).
Exemple for PHP 7.3.12 :
Unpack Loader "ioncube_loader_win_7.3.dll" to E:\wamp64\bin\php\php7.3.12\zend_ext\ioncube_loader_win_7.3.dll
Search in phpForApache.ini:
[opcache]
; opcache documentation [
php.net]
Add BEFORE:
[ioncube]
zend_extension="E:/wamp64/bin/php/php7.3.12/zend_ext/ioncube_loader_win_7.2.dll"
Restart wampServer two times.
Check a phpinfo page Section "ionCube Loader".