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After upgrading PHP from 5.1x to 5.2.10, there are a lot of warning when php -v:

[root@localhost ~]# php -v
PHP Warning:  PHP Startup: fileinfo: Unable to initialize module
Module compiled with module API=20050922, debug=0, thread-safety=0
PHP    compiled with module API=20060613, debug=0, thread-safety=0
These options need to match
 in Unknown on line 0
PHP Warning:  PHP Startup: mcrypt: Unable to initialize module
Module compiled with module API=20050922, debug=0, thread-safety=0
PHP    compiled with module API=20060613, debug=0, thread-safety=0
These options need to match
 in Unknown on line 0
PHP Warning:  PHP Startup: memcache: Unable to initialize module
Module compiled with module API=20050922, debug=0, thread-safety=0
PHP    compiled with module API=20060613, debug=0, thread-safety=0
These options need to match
 in Unknown on line 0
PHP Warning:  PHP Startup: mhash: Unable to initialize module
Module compiled with module API=20050922, debug=0, thread-safety=0
PHP    compiled with module API=20060613, debug=0, thread-safety=0
These options need to match
 in Unknown on line 0
PHP Warning:  PHP Startup: mssql: Unable to initialize module
Module compiled with module API=20050922, debug=0, thread-safety=0
PHP    compiled with module API=20060613, debug=0, thread-safety=0
These options need to match
 in Unknown on line 0
PHP Warning:  PHP Startup: readline: Unable to initialize module
Module compiled with module API=20050922, debug=0, thread-safety=0
PHP    compiled with module API=20060613, debug=0, thread-safety=0
These options need to match
 in Unknown on line 0
PHP Warning:  PHP Startup: tidy: Unable to initialize module
Module compiled with module API=20050922, debug=0, thread-safety=0
PHP    compiled with module API=20060613, debug=0, thread-safety=0
These options need to match
 in Unknown on line 0
PHP 5.2.10 (cli) (built: Nov 13 2009 11:24:03)
Copyright (c) 1997-2009 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2009 Zend Technologies

How can I fix that? Thanks!

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2 Answers 2

up vote 2 down vote accepted

You need to remove the old modules and install the new. If you installed via yum/rpm then update the packages. If you built PHP yourself then you'll need to build it with those extensions as well.

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Even though memcached is happily running on the server, it's not accessible from PHP without the PECL extension. Fortunately this is a very easy process; just use the pecl command:

$ pecl install memcache

See: http://www.lullabot.com/articles/installing-memcached-redhat-or-centos

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