PHP Fatal error: Call to undefined function zlib_encode()

[fabieng]

Hello !

as per title, since few I have this when some php funcion is calling zlib_encode :

PHP Fatal error: Call to undefined function zlib_encode()

I saw that is was a know bug when there are some rewrite rules on .htacccess which is my case
http://download1.parallels.com/Ples...lels-plesk-panel-11.0-for-linux-based-os.html

I checked for json as well, and seem to be activated :
json
json support => enabled
json version => 1.2.1

any idea about this pb ?

thx for your help !

 

[fabieng]

ok as far as I see, this function is not implemented before php5.4

but as I can see, plesk 11 is running with 5.3.

How can we upgrade php via plesk admin ? does plesk support higher php version than 5.3 ? thx !