im trying to upgrade php from 5.1.6 to 5.2.1. When invoking the yum update php i get this message:

--> Finished Dependency Resolution php-eaccelerator-5.1.6_0.9.5.2-4.el5.rf.x86_64 from installed has depsolving problems

--> Missing Dependency: php = 5.1.6 is needed by package php-eaccelerator-5.1.6_0.9.5.2-4.el5.rf.x86_64 (installed) Error: Missing Dependency: php = 5.1.6 is needed by package php-eaccelerator-5.1.6_0.9.5.2-4.el5.rf.x86_64 (installed) You could try using --skip-broken to work around the problem You could try running: package-cleanup --problems package-cleanup --dupes rpm -Va --nofiles --nodigest

The program package-cleanup is found in the yum-utils package.

The message is giving instructions but i really don't know how to proceed. This is a production server and it cannot be down for more than 1 minute.

Thanks for any ideas.

I only needed PHP 5.2.1 for the new json_decode() function. I added this and the upgrade was not longer necessary: http://snipplr.com/view/4964/emulate-php-5-for-backwards-compatibility/

2 Answers 2


The RPMforge repo does not have a version of php-eaccelerator built against php 5.2.1.

In fact 5.1.6 is the latest it has. See http://packages.sw.be/php-eaccelerator/

Your options:

  1. Don't update php.
  2. Try to rebuild the php-eaccelerator RPM against php 5.2.1. If you are not comfortable editing rpm spec files and compiling from source you shouldn't attempt this.
  3. Look for a php-eaccelerator RPM that is build for php 5.2.1 http://www.atoomnet.net/centos_updated_php.php may work but I cannot attest to its quality.

Bigger-picture questions:

  • Why are you upgrading to a version of php that isn't the latest (far from it)? Is that the latest in the CentOS/RHEL repo?
  • Why has your environment been engineered such that this one server cannot be down for more than 1 minute? That's bad.
  • i need to update php to have json_decode() support. That is the only actual reason :s
    – Andres SK
    Dec 16, 2010 at 1:07
  • also, i can't have it more than 1 minute down because of the high traffic hehe.
    – Andres SK
    Dec 16, 2010 at 1:08
  • He means why do you have a single point of failure, rather you should have another server ready to take over if one goes down. Dec 18, 2010 at 22:27

For PHP 5.1 the json extension is available via pecl. No need to upgrade PHP just for this (although now both PHP 5.1 and 5.2 are end of line)

You need both php-devel and php-pear installed:

yum install php-devel php-pear


pecl install json
echo "extension=json.so" > /etc/php.d/json.ini

Since you've already upgraded PHP however, it may be easiest to either compile eAccelerator yourself (its not available via pecl):


or switch to a repository that supplies eAccelerator rpm for the PHP version installed. I provide eaccelerator for PHP 5.3, along with PHP 5.3 itself if you need it. I don't supply eaccelerator for PHP 5.2 though.



yum install php-eaccelerator --enablerepo=webtatic

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