Learning Journal

Class ‘HttpResponse’ Not Found

After I “upgraded” Fedora (to Fedora 19) on my main PC recently, I only had one other essential post-installation task to complete before I could get back to my regular programming on this machine. I just had to install the pecl_http PHP extension next.

This time, however, I didn’t have to install it “manually” like I used to do on quite a few occasions before. Nowadays, things are a lot different – the pecl_http PHP extension is now available as a neat little package in the main Fedora repository and can be easily installed via the Yum Package Manager with just one simple command:

sudo yum install php-pecl-http*

As soon as the software was successfully installed and the whole task out of the way, I excitedly tested my web page with PHP script that included code that required the pecl_http PHP extension. Every request of the web page was simply returned as a 500 Server Error! I was thoroughly confused and here’s what going through the error log revealed:

.. PHP Fatal error:  Class 'HttpResponse' not found in /home/mememe/domains/ on line 54, referer: http://www.gidapp.lan/

What I really didn’t notice until just now is that there are 2 versions of the pecl_http PHP extension! Who knew?

[[email protected] tmp]$ sudo yum info php-pecl-http
Name        : php-pecl-http
Arch        : i686
Version     : 2.0.0
Release     : 0.16.beta4.fc19
Size        : 254 k
Repo        : fedora/19/i386
Summary     : Extended HTTP support
URL         :
License     : BSD
Description : The HTTP extension aims to provide a convenient and powerful set of
            : functionality for major applications.
            : The HTTP extension eases handling of HTTP URLs, dates, redirects, headers
            : and messages in a HTTP context (both incoming and outgoing). It also provides
            : means for client negotiation of preferred language and charset, as well as
            : a convenient way to exchange arbitrary data with caching and resuming
            : capabilities.
            : Also provided is a powerful request and parallel interface.
            : Version 2 is completely incompatible to previous version.
            : Documentation :

What I had installed on all my other computers before and what I have been using up until today was pecl_http version 1+. What is installed on my remote web servers is also pecl_http version 1+. What I had installed on my main PC today, however, was pecl_http version 2! And guess what else? The 2 versions are completely incompatible with each other! In other words, pecl_http PHP extension version 2 does not even have a class named HttpResponse anymore, which explains the error report.

From the official documentation for pecl_http version 2:

This is to become v2 of the known pecl_http extension.
It is completely incompatible to previous version.

Emphasis mine.

After confirmation from an expert, I uninstalled the software right away:

sudo yum remove php-pecl-http

And re-installed the pecl_http PHP extension version 1+ the old-fashioned way.

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