LinuxHostingSupport

To install/enable Json support for PHP on a Linux Plesk server, follow the below steps:

1. Install php-pear and gcc

# yum install php-pear gcc

2. Install json module

# pecl install json

3. Now, the json.so file is created under the php lib directory i.e. /usr/lib64/php/modules/ and needs to be called in the json.ini so PHP configuration could read it.

# cd /etc/php.d 

# echo "extension=json.so" >> json.ini

4. Once done, restart the httpd service

# /etc/init.d/httpd restart

This is it.

However, the other way is to manually install the php-json module. Follow the below steps:

1. Download the json package

# wget http://pecl.php.net/get/json-1.2.0.tgz

2. Untar and goto the newly created directory

# tar -zxf json-1.2.0.tgz 

# cd json-1.2.0

3. Create the configuration files and configure json

# phpize 

# ./configure

4. Create the installation file and install it

# make 

# make install

Once done, json.so will be created in /usr/lib64/php/modules/ directory and needs to be called by the php configuration directory

# cd /etc/php.d 

# echo “extension=json.so” >> json.ini

Restart the httpd service and check the php-json module by executing

# php -m | grep json

Note:  The manual installation method can be used on a plain Linux server as well, just the extension need to be added in the php.ini file directly.

While accessing the Plesk control panel, you may encounter an error message as follows:

ERROR: PleskFatalException StatInfo-> getProductVersion failed

OR

ERROR: PleskFatalException StatInfo-> getProductVersion failed: 

file_get_contents () failed: mktime() 

[<a href='function.mktime'>function.mktime</a>]

The “Plesk getProductVersion failed ” message states that either the Plesk version file /usr/local/psa/version is empty AND/OR the plesk version in the ‘psa.misc’ table is incorrect. This is mostly caused due to a failed Plesk upgrade OR by removing/installing some Plesk modules.

To fix the issue do the following:

1. First, check the Plesk version installed on the server

# rpm -qi psa

note down the ‘version’ and ‘release’ values (these values will be different on your server).

Version : 9.5.3 Release : cos5.build95301122.20

now, check the OS installed on the server (for example, on CentOS)

# cat /etc/redhat-release 

CentOS release 5.5 (Final)

Using the above Plesk and OS info, insert a line as follows (your values will differ) in the /usr/local/psa/version file.

9.5.3 CentOS 5 95301122.20

Save the file and restart the psa serivce.

2. If the above fix doesn’t work, do the following

Check the current value of  Plesk in the psa.misc table.

mysql> select * from psa.misc where param='version';

If the value is not 0953 (example from my server), run the mysql update query to set the proper value. You should use the value that is returned by the ‘rpm -qi psa’  command on your server.

mysql> update psa.misc set val="0953" where param="version";

Exit and restart mysql. That is it.