source: extensions/imgpreview/maintain.inc.php

<?php

function plugin_install()
{
    global $prefixeTable;
    $q = '
INSERT INTO ' . CONFIG_TABLE . ' (param,value,comment)
        VALUES
        ("imgpreview" , "400#600#true#true#false" , "max-width#max-height#title#opacity#preloadImages");';
    pwg_query($q);

}



function plugin_activate()
{
  global $prefixeTable, $conf;
        //////////// Check Config
        $query = '
        SELECT COUNT(*) AS result FROM '.CONFIG_TABLE.'
        WHERE param IN (\'imgpreview\')
        ;';
        $data_table = pwg_db_fetch_assoc(pwg_query($query));
        $exist = $data_table['result'];
        if ( $exist == 0 )
        {
                plugin_install();
        } 
        else {
                load_conf_from_db();

                if (count(explode("#" , $conf['imgpreview']))!=5)
                {
                        pwg_query('DELETE FROM '.CONFIG_TABLE.' WHERE param IN (\'imgpreview\')');
                        pwg_query($q);
                        plugin_install();
                }
        }
}//fin active




function plugin_uninstall()
{
        global $prefixeTable;
  pwg_query('DELETE FROM '.CONFIG_TABLE.' WHERE param IN (\'imgpreview\')');
}//fin uninstall


?>