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<?php /* vim: set expandtab sw=4 ts=4 sts=4: */ /** * Library for extracting information about the available storage engines * * @version $Id$ */
/** * defines */ define('PMA_ENGINE_SUPPORT_NO', 0); define('PMA_ENGINE_SUPPORT_DISABLED', 1); define('PMA_ENGINE_SUPPORT_YES', 2); define('PMA_ENGINE_SUPPORT_DEFAULT', 3);
define('PMA_ENGINE_DETAILS_TYPE_PLAINTEXT', 0); define('PMA_ENGINE_DETAILS_TYPE_SIZE', 1); define('PMA_ENGINE_DETAILS_TYPE_NUMERIC', 2); //Has no effect yet... define('PMA_ENGINE_DETAILS_TYPE_BOOLEAN', 3); // 'ON' or 'OFF'
/** * base Storage Engine Class */ class PMA_StorageEngine { /** * @var string engine name */ var $engine = 'dummy';
/** * @var string engine title/description */ var $title = 'PMA Dummy Engine Class';
/** * @var string engine lang description */ var $comment = 'If you read this text inside phpMyAdmin, something went wrong...';
/** * @var integer engine supported by current server */ var $support = PMA_ENGINE_SUPPORT_NO;
/** * returns array of storage engines * * @static * @staticvar array $storage_engines storage engines * @access public * @uses PMA_MYSQL_INT_VERSION * @uses PMA_StorageEngine::getStorageEnginesBefore40102() * @uses PMA_DBI_fetch_result() * @return array of storage engines */ function getStorageEngines() { static $storage_engines = null;
if (null !== $storage_engines) { return $storage_engines; }
$storage_engines = array();
// SHOW STORAGE ENGINES comes with MySQL 4.1.2 if (PMA_MYSQL_INT_VERSION < 40102) { $storage_engines = PMA_StorageEngine::getStorageEnginesBefore40102(); } else { $storage_engines = PMA_DBI_fetch_result('SHOW STORAGE ENGINES', 'Engine'); }
return $storage_engines; }
/** * returns HTML code for storage engine select box * * @author rabus * @static * @uses PMA_StorageEngine::getStorageEngines() * @uses strtolower() * @uses htmlspecialchars() * @param string $name The name of the select form element * @param string $id The ID of the form field * @param string $selected The selected engine * @param boolean $offerUnavailableEngines * Should unavailable storage engines be offered? * @return string html selectbox */ function getHtmlSelect($name = 'engine', $id = null, $selected = null, $offerUnavailableEngines = false) { $selected = strtolower($selected); $output = '<select name="' . $name . '"' . (empty($id) ? '' : ' id="' . $id . '"') . '>' . "\n";
foreach (PMA_StorageEngine::getStorageEngines() as $key => $details) { if (!$offerUnavailableEngines && ($details['Support'] == 'NO' || $details['Support'] == 'DISABLED')) { continue; } $output .= ' <option value="' . htmlspecialchars($key). '"' . (empty($details['Comment']) ? '' : ' title="' . htmlspecialchars($details['Comment']) . '"') . (strtolower($key) == $selected || (empty($selected) && $details['Support'] == 'DEFAULT') ? ' selected="selected"' : '') . '>' . "\n" . ' ' . htmlspecialchars($details['Engine']) . "\n" . ' </option>' . "\n"; } $output .= '</select>' . "\n"; return $output; }
/** * returns array of storage engines for MySQL < 4.1, hard coded * Emulating SHOW STORAGE ENGINES... * * @static * @access public * @uses PMA_DBI_query() * @uses PMA_DBI_fetch_row() * @uses PMA_DBI_free_result() * @uses substr() * @return array of storage engines */ function getStorageEnginesBefore40102() { $storage_engines = array( 'myisam' => array( 'Engine' => 'MyISAM', 'Support' => 'DEFAULT' ), 'merge' => array( 'Engine' => 'MERGE', 'Support' => 'YES' ), 'heap' => array( 'Engine' => 'HEAP', 'Support' => 'YES' ), 'memory' => array( 'Engine' => 'MEMORY', 'Support' => 'YES' ) ); $known_engines = array( 'archive' => 'ARCHIVE', 'bdb' => 'BDB', 'csv' => 'CSV', 'innodb' => 'InnoDB', 'isam' => 'ISAM', 'gemini' => 'Gemini' ); $res = PMA_DBI_query('SHOW VARIABLES LIKE \'have\\_%\';'); while ($row = PMA_DBI_fetch_row($res)) { $current = substr($row[0], 5); if (! empty($known_engines[$current])) { $storage_engines[$current] = array( 'Engine' => $known_engines[$current], 'Support' => $row[1] ); } } PMA_DBI_free_result($res);
return $storage_engines; }
/** * public static final PMA_StorageEngine getEngine() * * Loads the corresponding engine plugin, if available. * * @uses str_replace() * @uses file_exists() * @uses PMA_StorageEngine * @param string $engine The engine ID * @return object The engine plugin */ function getEngine($engine) { $engine = str_replace('/', '', str_replace('.', '', $engine)); $engine_lowercase_filename = strtolower($engine); if (file_exists('./libraries/engines/' . $engine_lowercase_filename . '.lib.php') && include_once './libraries/engines/' . $engine_lowercase_filename . '.lib.php') { $class_name = 'PMA_StorageEngine_' . $engine; $engine_object = new $class_name($engine); } else { $engine_object = new PMA_StorageEngine($engine); } return $engine_object; }
/** * return true if given engine name is supported/valid, otherwise false * * @static * @uses PMA_StorageEngine::getStorageEngines() * @param string $engine name of engine * @reutrn boolean whether $engine is valid or not */ function isValid($engine) { $storage_engines = PMA_StorageEngine::getStorageEngines(); return isset($storage_engines[$engine]); }
/** * returns as HTML table of the engine's server variables * * @uses PMA_ENGINE_DETAILS_TYPE_SIZE * @uses PMA_ENGINE_DETAILS_TYPE_NUMERIC * @uses PMA_StorageEngine::getVariablesStatus() * @uses $GLOBALS['strNoDetailsForEngine'] * @uses PMA_showHint() * @uses PMA_formatByteDown() * @uses PMA_formatNumber() * @uses htmlspecialchars() * @return string The table that was generated based on the retrieved information */ function getHtmlVariables() { $odd_row = false; $ret = '';
foreach ($this->getVariablesStatus() as $details) { $ret .= '<tr class="' . ($odd_row ? 'odd' : 'even') . '">' . "\n" . ' <td>' . "\n"; if (!empty($details['desc'])) { $ret .= ' ' . PMA_showHint($details['desc']) . "\n"; } $ret .= ' </td>' . "\n" . ' <th>' . htmlspecialchars($details['title']) . '</th>' . "\n" . ' <td class="value">'; switch ($details['type']) { case PMA_ENGINE_DETAILS_TYPE_SIZE: $parsed_size = PMA_formatByteDown($details['value']); $ret .= $parsed_size[0] . ' ' . $parsed_size[1]; unset($parsed_size); break; case PMA_ENGINE_DETAILS_TYPE_NUMERIC: $ret .= PMA_formatNumber($details['value']) . ' '; break; default: $ret .= htmlspecialchars($details['value']) . ' '; } $ret .= '</td>' . "\n" . '</tr>' . "\n"; $odd_row = !$odd_row; }
if (! $ret) { $ret = '<p>' . "\n" . ' ' . $GLOBALS['strNoDetailsForEngine'] . "\n" . '</p>' . "\n"; } else { $ret = '<table class="data">' . "\n" . $ret . '</table>' . "\n"; }
return $ret; }
/** * returns array with detailed info about engine specific server variables * * @uses PMA_ENGINE_DETAILS_TYPE_PLAINTEXT * @uses PMA_StorageEngine::getVariables() * @uses PMA_StorageEngine::getVariablesLikePattern() * @uses PMA_MYSQL_INT_VERSION * @uses PMA_DBI_query() * @uses PMA_DBI_fetch_assoc() * @uses PMA_DBI_free_result() * @return array with detailed info about specific engine server variables */ function getVariablesStatus() { $variables = $this->getVariables(); $like = $this->getVariablesLikePattern();
if ($like) { $like = " LIKE '" . $like . "' "; } else { $like = ''; }
if (PMA_MYSQL_INT_VERSION >= 40102) { $global = ' GLOBAL '; } else { $global = ''; }
$mysql_vars = array();
$sql_query = 'SHOW ' . $global . ' VARIABLES ' . $like . ';'; $res = PMA_DBI_query($sql_query); while ($row = PMA_DBI_fetch_assoc($res)) { if (isset($variables[$row['Variable_name']])) { $mysql_vars[$row['Variable_name']] = $variables[$row['Variable_name']]; } elseif (! $like && strpos(strtolower($row['Variable_name']), strtolower($this->engine)) !== 0) { continue; } $mysql_vars[$row['Variable_name']]['value'] = $row['Value'];
if (empty($mysql_vars[$row['Variable_name']]['title'])) { $mysql_vars[$row['Variable_name']]['title'] = $row['Variable_name']; }
if (! isset($mysql_vars[$row['Variable_name']]['type'])) { $mysql_vars[$row['Variable_name']]['type'] = PMA_ENGINE_DETAILS_TYPE_PLAINTEXT; } } PMA_DBI_free_result($res);
return $mysql_vars; }
/** * Constructor * * @uses PMA_StorageEngine::getStorageEngines() * @uses PMA_ENGINE_SUPPORT_DEFAULT * @uses PMA_ENGINE_SUPPORT_YES * @uses PMA_ENGINE_SUPPORT_DISABLED * @uses PMA_ENGINE_SUPPORT_NO * @uses $this->engine * @uses $this->title * @uses $this->comment * @uses $this->support * @param string $engine The engine ID */ function __construct($engine) { $storage_engines = PMA_StorageEngine::getStorageEngines(); if (!empty($storage_engines[$engine])) { $this->engine = $engine; $this->title = $storage_engines[$engine]['Engine']; $this->comment = (isset($storage_engines[$engine]['Comment']) ? $storage_engines[$engine]['Comment'] : ''); switch ($storage_engines[$engine]['Support']) { case 'DEFAULT': $this->support = PMA_ENGINE_SUPPORT_DEFAULT; break; case 'YES': $this->support = PMA_ENGINE_SUPPORT_YES; break; case 'DISABLED': $this->support = PMA_ENGINE_SUPPORT_DISABLED; break; case 'NO': default: $this->support = PMA_ENGINE_SUPPORT_NO; } } }
/** * old PHP 4 style constructor * @deprecated * @see PMA_StorageEngine::__construct() * @uses PMA_StorageEngine::__construct() * @param string $engine engine name */ function PMA_StorageEngine($engine) { $this->__construct($engine); }
/** * public String getTitle() * * Reveals the engine's title * @uses $this->title * @return string The title */ function getTitle() { return $this->title; }
/** * public String getComment() * * Fetches the server's comment about this engine * @uses $this->comment * @return string The comment */ function getComment() { return $this->comment; }
/** * public String getSupportInformationMessage() * * @uses $GLOBALS['strDefaultEngine'] * @uses $GLOBALS['strEngineAvailable'] * @uses $GLOBALS['strEngineDisabled'] * @uses $GLOBALS['strEngineUnsupported'] * @uses $GLOBALS['strEngineUnsupported'] * @uses PMA_ENGINE_SUPPORT_DEFAULT * @uses PMA_ENGINE_SUPPORT_YES * @uses PMA_ENGINE_SUPPORT_DISABLED * @uses PMA_ENGINE_SUPPORT_NO * @uses $this->support * @uses $this->title * @uses sprintf * @return string The localized message. */ function getSupportInformationMessage() { switch ($this->support) { case PMA_ENGINE_SUPPORT_DEFAULT: $message = $GLOBALS['strDefaultEngine']; break; case PMA_ENGINE_SUPPORT_YES: $message = $GLOBALS['strEngineAvailable']; break; case PMA_ENGINE_SUPPORT_DISABLED: $message = $GLOBALS['strEngineDisabled']; break; case PMA_ENGINE_SUPPORT_NO: default: $message = $GLOBALS['strEngineUnsupported']; } return sprintf($message, htmlspecialchars($this->title)); }
/** * public string[][] getVariables() * * Generates a list of MySQL variables that provide information about this * engine. This function should be overridden when extending this class * for a particular engine. * * @abstract * @return Array The list of variables. */ function getVariables() { return array(); }
/** * returns string with filename for the MySQL helppage * about this storage engne * * @return string mysql helppage filename */ function getMysqlHelpPage() { return $this->engine . '-storage-engine'; }
/** * public string getVariablesLikePattern() * * @abstract * @return string SQL query LIKE pattern */ function getVariablesLikePattern() { return false; }
/** * public String[] getInfoPages() * * Returns a list of available information pages with labels * * @abstract * @return array The list */ function getInfoPages() { return array(); }
/** * public String getPage() * * Generates the requested information page * * @abstract * @param string $id The page ID * * @return string The page * boolean or false on error. */ function getPage($id) { return false; } }
?>
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