/res/plugins/plugin.php

<?php

/** Adminer customization allowing usage of plugins
 *
 * @link https://www.adminer.org/plugins/#use
 * @author Jakub Vrana, http://www.vrana.cz/
 * @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0
 * @license http://www.gnu.org/licenses/gpl-2.0.html GNU General Public License, version 2 (one or other)
 */
class AdminerPlugin extends Adminer
{
    /** @access protected */
    var $plugins;

    function _findRootClass($class)
    {
        // is_subclass_of(string, string) is available since PHP 5.0.3
        do {
            $return = $class;
        } while ($class = get_parent_class($class));

        return $return;
    }

    /** Register plugins
     *
     * @param array object instances or null to register all classes starting by 'Adminer'
     */
    function __construct($plugins)
    {
        if ($plugins === null) {
            $plugins = array();
            foreach (get_declared_classes() as $class) {
                if (preg_match('~^Adminer.~i', $class) &&
                    strcasecmp($this->_findRootClass($class), 'Adminer')
                ) { //! can use interface
                    $plugins[$class] = new $class;
                }
            }
        }
        $this->plugins = $plugins;
        //! it is possible to use ReflectionObject to find out which plugins defines which methods at once
    }

    function _callParent($function, $args)
    {
        return call_user_func_array(array('parent', $function), $args);
    }

    function _applyPlugin($function, $args)
    {
        foreach ($this->plugins as $plugin) {
            if (method_exists($plugin, $function)) {
                switch (count($args)) { // call_user_func_array() doesn't work well with references
                    case 0:
                        $return = $plugin->$function();
                        break;
                    case 1:
                        $return = $plugin->$function($args[0]);
                        break;
                    case 2:
                        $return = $plugin->$function($args[0], $args[1]);
                        break;
                    case 3:
                        $return = $plugin->$function($args[0], $args[1], $args[2]);
                        break;
                    case 4:
                        $return = $plugin->$function($args[0], $args[1], $args[2], $args[3]);
                        break;
                    case 5:
                        $return = $plugin->$function($args[0], $args[1], $args[2], $args[3], $args[4]);
                        break;
                    case 6:
                        $return = $plugin->$function($args[0], $args[1], $args[2], $args[3], $args[4], $args[5]);
                        break;
                    default:
                        trigger_error('Too many parameters.', E_USER_WARNING);
                }
                if ($return !== null) {
                    return $return;
                }
            }
        }

        return $this->_callParent($function, $args);
    }

    function _appendPlugin($function, $args)
    {
        $return = $this->_callParent($function, $args);
        foreach ($this->plugins as $plugin) {
            if (method_exists($plugin, $function)) {
                $return += call_user_func_array(array($plugin, $function), $args);
            }
        }

        return $return;
    }

    // appendPlugin

    function dumpFormat()
    {
        $args = func_get_args();

        return $this->_appendPlugin(__FUNCTION__, $args);
    }

    function dumpOutput()
    {
        $args = func_get_args();

        return $this->_appendPlugin(__FUNCTION__, $args);
    }

    function editFunctions($field)
    {
        $args = func_get_args();

        return $this->_appendPlugin(__FUNCTION__, $args);
    }

    // applyPlugin

    function name()
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function credentials()
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function permanentLogin($create = false)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function database()
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function schemas()
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function databases($flush = true)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function queryTimeout()
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function headers()
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function head()
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function loginForm()
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function login($login, $password)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function tableName($tableStatus)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function fieldName($field, $order = 0)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectLinks($tableStatus, $set = "")
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function foreignKeys($table)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function backwardKeys($table, $tableName)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function backwardKeysPrint($backwardKeys, $row)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectQuery($query, $time)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function rowDescription($table)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function rowDescriptions($rows, $foreignKeys)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectLink($val, $field)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectVal($val, $link, $field, $original)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function editVal($val, $field)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectColumnsPrint($select, $columns)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectSearchPrint($where, $columns, $indexes)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectOrderPrint($order, $columns, $indexes)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectLimitPrint($limit)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectLengthPrint($text_length)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectActionPrint($indexes)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectCommandPrint()
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectImportPrint()
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectEmailPrint($emailFields, $columns)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectColumnsProcess($columns, $indexes)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectSearchProcess($fields, $indexes)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectOrderProcess($fields, $indexes)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectLimitProcess()
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectLengthProcess()
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectEmailProcess($where, $foreignKeys)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function selectQueryBuild($select, $where, $group, $order, $limit, $page)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function messageQuery($query, $time)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function editInput($table, $field, $attrs, $value)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function processInput($field, $value, $function = "")
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function dumpDatabase($db)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function dumpTable($table, $style, $is_view = 0)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function dumpData($table, $style, $query)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function dumpFilename($identifier)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function dumpHeaders($identifier, $multi_table = false)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function homepage()
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function navigation($missing)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function databasesPrint($missing)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

    function tablesPrint($tables)
    {
        $args = func_get_args();

        return $this->_applyPlugin(__FUNCTION__, $args);
    }

}