After having searched and searched again and again, I have found that the history information of my browser fooled me.
First, I have copied the icu*.dll
files from my %WAMP_INSTALL_DIR%\bin\php\php5.4.12
to my %WAMP_INSTALL_DIR%\bin\apache\Apache2.4.4\bin
as mentioned here: intl extension php_intl.dll with wamp
, and restarted all of my services.
Then, I had the idea of clearing my history, after having copied the files as above-mentioned, and it worked!
I do hope this will help others.