Use configuration. php In Joomla to store simple data

Write Process
Copy codeThe Code is as follows:
// Get the path of the configuration file
$ Fname = JPATH_CONFIGURATION.DS. 'configuration. php ';
// Clear cache
$ Cache = JFactory: getCache ();
$ Cache-> clean ();
// Update the credentials with the new settings
$ Config = & JFactory: getConfig ();
$ Config-> setValue ('config. custom_var ', 'xxx ');
// Get the config registry in PHP class format and write it to configuation. php
Jimport ('joomla. filesystem. file ');
If (! JFile: write ($ fname, $ config-> toString ('php', 'config', array ('class' => 'jconfig ')))){
Die (JText: _ ('errorconfigfile '));
}

Extraction Process
Copy codeThe Code is as follows:
Global $ mainframe;
$ Mainframe-> getCfg ('m M _ var ');