[1] | 1 | <?php |
---|
| 2 | /** |
---|
[362] | 3 | * The Strangecode Codebase - a general application development framework for PHP |
---|
| 4 | * For details visit the project site: <http://trac.strangecode.com/codebase/> |
---|
[396] | 5 | * Copyright 2001-2012 Strangecode, LLC |
---|
[465] | 6 | * |
---|
[362] | 7 | * This file is part of The Strangecode Codebase. |
---|
| 8 | * |
---|
| 9 | * The Strangecode Codebase is free software: you can redistribute it and/or |
---|
| 10 | * modify it under the terms of the GNU General Public License as published by the |
---|
| 11 | * Free Software Foundation, either version 3 of the License, or (at your option) |
---|
| 12 | * any later version. |
---|
[465] | 13 | * |
---|
[362] | 14 | * The Strangecode Codebase is distributed in the hope that it will be useful, but |
---|
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
---|
| 16 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more |
---|
| 17 | * details. |
---|
[465] | 18 | * |
---|
[362] | 19 | * You should have received a copy of the GNU General Public License along with |
---|
| 20 | * The Strangecode Codebase. If not, see <http://www.gnu.org/licenses/>. |
---|
| 21 | */ |
---|
| 22 | |
---|
| 23 | /** |
---|
[1] | 24 | * DB.inc.php |
---|
| 25 | * |
---|
[136] | 26 | * Very lightweight DB semi-abstraction layer. Mainly to catch errors with mysql_query, with some goodies. |
---|
[1] | 27 | * |
---|
| 28 | * @author Quinn Comendant <quinn@strangecode.com> |
---|
[136] | 29 | * @version 2.1 |
---|
[1] | 30 | */ |
---|
[42] | 31 | |
---|
[502] | 32 | class DB |
---|
| 33 | { |
---|
[1] | 34 | |
---|
[468] | 35 | // A place to keep an object instance for the singleton pattern. |
---|
[484] | 36 | protected static $instance = null; |
---|
[468] | 37 | |
---|
[136] | 38 | // If $db->connect has successfully opened a db connection. |
---|
[484] | 39 | protected $_connected = false; |
---|
[1] | 40 | |
---|
[136] | 41 | // Database handle. |
---|
[468] | 42 | public $dbh; |
---|
[465] | 43 | |
---|
[172] | 44 | // Count how many queries run during the whole instance. |
---|
[484] | 45 | protected $_query_count = 0; |
---|
[1] | 46 | |
---|
| 47 | // Hash of DB parameters. |
---|
[484] | 48 | protected $_params = array(); |
---|
[1] | 49 | |
---|
| 50 | // Default parameters. |
---|
[484] | 51 | protected $_param_defaults = array( |
---|
[1] | 52 | |
---|
| 53 | // DB passwords should be set as apache environment variables in httpd.conf, readable only by root. |
---|
| 54 | 'db_server' => 'localhost', |
---|
| 55 | 'db_name' => null, |
---|
| 56 | 'db_user' => null, |
---|
| 57 | 'db_pass' => null, |
---|
| 58 | |
---|
[231] | 59 | // Display all SQL queries. FALSE recommended for production sites. |
---|
[136] | 60 | 'db_always_debug' => false, |
---|
| 61 | |
---|
[231] | 62 | // Display db errors. FALSE recommended for production sites. |
---|
[136] | 63 | 'db_debug' => false, |
---|
[465] | 64 | |
---|
[231] | 65 | // Script stops on db error. TRUE recommended for production sites. |
---|
| 66 | 'db_die_on_failure' => true, |
---|
[601] | 67 | |
---|
| 68 | // Special date settings. These will dynamically changes depending on MySQL version or settings. |
---|
| 69 | 'zero_date' => '0000-00-00', |
---|
| 70 | 'infinity_date' => '9999-12-31', |
---|
[660] | 71 | |
---|
| 72 | // Timezone for MySQL. |
---|
| 73 | 'timezone' => 'UTC', |
---|
[683] | 74 | |
---|
| 75 | // MySQL character set and collation. |
---|
| 76 | 'character_set' => '', |
---|
| 77 | 'collation' => '', |
---|
[1] | 78 | ); |
---|
[42] | 79 | |
---|
[1] | 80 | // Translate between HTML and MySQL character set names. |
---|
[468] | 81 | public $mysql_character_sets = array( |
---|
[1] | 82 | 'utf-8' => 'utf8', |
---|
| 83 | 'iso-8859-1' => 'latin1', |
---|
| 84 | ); |
---|
[42] | 85 | |
---|
[1] | 86 | // Caches. |
---|
[630] | 87 | protected static $existing_tables = null; |
---|
| 88 | protected static $table_columns = null; |
---|
[42] | 89 | |
---|
[1] | 90 | /** |
---|
[601] | 91 | * Constructor. |
---|
| 92 | */ |
---|
| 93 | public function __construct() |
---|
| 94 | { |
---|
| 95 | // Initialize default parameters. |
---|
| 96 | $this->_params = array_merge($this->_params, $this->_param_defaults); |
---|
| 97 | } |
---|
| 98 | |
---|
| 99 | /** |
---|
[1] | 100 | * This method enforces the singleton pattern for this class. |
---|
| 101 | * |
---|
[136] | 102 | * @return object Reference to the global DB object. |
---|
[1] | 103 | * @access public |
---|
| 104 | * @static |
---|
| 105 | */ |
---|
[468] | 106 | public static function &getInstance() |
---|
[1] | 107 | { |
---|
[468] | 108 | if (self::$instance === null) { |
---|
| 109 | self::$instance = new self(); |
---|
[1] | 110 | } |
---|
| 111 | |
---|
[468] | 112 | return self::$instance; |
---|
[1] | 113 | } |
---|
[42] | 114 | |
---|
[1] | 115 | /** |
---|
| 116 | * Set (or overwrite existing) parameters by passing an array of new parameters. |
---|
| 117 | * |
---|
| 118 | * @access public |
---|
| 119 | * |
---|
| 120 | * @param array $params Array of parameters (key => val pairs). |
---|
| 121 | */ |
---|
[468] | 122 | public function setParam($params) |
---|
[1] | 123 | { |
---|
[479] | 124 | $app =& App::getInstance(); |
---|
[465] | 125 | |
---|
[1] | 126 | if (isset($params) && is_array($params)) { |
---|
| 127 | // Merge new parameters with old overriding only those passed. |
---|
[136] | 128 | $this->_params = array_merge($this->_params, $params); |
---|
[1] | 129 | } else { |
---|
[136] | 130 | $app->logMsg(sprintf('Parameters are not an array: %s', $params), LOG_ERR, __FILE__, __LINE__); |
---|
[1] | 131 | } |
---|
| 132 | } |
---|
| 133 | |
---|
| 134 | /** |
---|
[136] | 135 | * Return the value of a parameter, if it exists. |
---|
[1] | 136 | * |
---|
[136] | 137 | * @access public |
---|
| 138 | * @param string $param Which parameter to return. |
---|
| 139 | * @return mixed Configured parameter value. |
---|
[1] | 140 | */ |
---|
[468] | 141 | public function getParam($param) |
---|
[1] | 142 | { |
---|
[479] | 143 | $app =& App::getInstance(); |
---|
[465] | 144 | |
---|
[478] | 145 | if (array_key_exists($param, $this->_params)) { |
---|
[136] | 146 | return $this->_params[$param]; |
---|
[1] | 147 | } else { |
---|
[146] | 148 | $app->logMsg(sprintf('Parameter is not set: %s', $param), LOG_DEBUG, __FILE__, __LINE__); |
---|
[1] | 149 | return null; |
---|
| 150 | } |
---|
| 151 | } |
---|
[42] | 152 | |
---|
[1] | 153 | /** |
---|
| 154 | * Connect to database with credentials in params. |
---|
| 155 | * |
---|
| 156 | * @access public |
---|
| 157 | * @author Quinn Comendant <quinn@strangecode.com> |
---|
| 158 | * @since 28 Aug 2005 14:02:49 |
---|
| 159 | */ |
---|
[468] | 160 | public function connect() |
---|
[1] | 161 | { |
---|
[479] | 162 | $app =& App::getInstance(); |
---|
[465] | 163 | |
---|
[136] | 164 | if (!$this->getParam('db_name') || !$this->getParam('db_user') || !$this->getParam('db_pass')) { |
---|
| 165 | $app->logMsg('Database credentials missing.', LOG_EMERG, __FILE__, __LINE__); |
---|
[1] | 166 | return false; |
---|
| 167 | } |
---|
[42] | 168 | |
---|
[563] | 169 | if (!$this->getParam('db_server')) { |
---|
| 170 | // If db_server not specified, assume localhost. |
---|
[564] | 171 | $this->setParam(array('db_server' => 'localhost')); |
---|
[563] | 172 | } |
---|
| 173 | |
---|
[1] | 174 | // Connect to database. Always create a new link to the server. |
---|
[563] | 175 | // Connection errors are suppressed so we can do our own error management below. |
---|
[468] | 176 | if ($this->dbh = @mysql_connect($this->getParam('db_server'), $this->getParam('db_user'), $this->getParam('db_pass'), true)) { |
---|
[1] | 177 | // Select database |
---|
[136] | 178 | mysql_select_db($this->getParam('db_name'), $this->dbh); |
---|
[1] | 179 | } |
---|
[42] | 180 | |
---|
[15] | 181 | // Test for connection errors. |
---|
[136] | 182 | if (!$this->dbh || mysql_error($this->dbh)) { |
---|
[627] | 183 | $mysql_error_msg = $this->dbh ? 'Codebase MySQL error: (' . mysql_errno($this->dbh) . ') ' . mysql_error($this->dbh) : sprintf('Codebase MySQL error: Could not connect to server (db_server=%s, db_name=%s, db_user=%s, db_pass=%s)', $this->getParam('db_server'), $this->getParam('db_name'), $this->getParam('db_user'), ('' == $this->getParam('db_pass') ? 'NO' : 'YES')); |
---|
[136] | 184 | $app->logMsg($mysql_error_msg, LOG_EMERG, __FILE__, __LINE__); |
---|
[15] | 185 | |
---|
| 186 | // Print helpful or pretty error? |
---|
[136] | 187 | if ($this->getParam('db_debug')) { |
---|
[1] | 188 | echo $mysql_error_msg . "\n"; |
---|
| 189 | } |
---|
[15] | 190 | |
---|
[416] | 191 | // Die if db_die_on_failure = true, or just continue without connection. |
---|
[230] | 192 | return $this->_fail(); |
---|
[1] | 193 | } |
---|
[42] | 194 | |
---|
[1] | 195 | // DB connection success! |
---|
[136] | 196 | $this->_connected = true; |
---|
[1] | 197 | |
---|
[683] | 198 | // If the mysql charset is not defined, try to determine a mysql charset from the app charset. |
---|
| 199 | if ('' == $this->getParam('character_set') && '' != $app->getParam('character_set') && isset($this->mysql_character_sets[mb_strtolower($app->getParam('character_set'))])) { |
---|
| 200 | $this->setParam(array('character_set' => $this->mysql_character_sets[mb_strtolower($app->getParam('character_set'))])); |
---|
[209] | 201 | } |
---|
[683] | 202 | if ('' != $this->getParam('character_set')) { |
---|
| 203 | if ('' != $this->getParam('collation')) { |
---|
| 204 | $this->query(sprintf("SET NAMES '%s' COLLATE '%s';", $this->getParam('character_set'), $this->getParam('collation'))); |
---|
| 205 | } else { |
---|
| 206 | $this->query(sprintf("SET NAMES '%s';", $this->getParam('character_set'))); |
---|
| 207 | } |
---|
| 208 | } |
---|
[10] | 209 | |
---|
[601] | 210 | // Update config for this version of MySQL. |
---|
| 211 | if (version_compare(mysql_get_server_info(), '5.7.4', '>=')) { |
---|
| 212 | $this->setParam(array('zero_date' => '1000-01-01')); |
---|
| 213 | } |
---|
| 214 | |
---|
[660] | 215 | // Set MySQL session timezone. |
---|
| 216 | if ($this->getParam('timezone')) { |
---|
[658] | 217 | // https://dev.mysql.com/doc/refman/5.5/en/time-zone-support.html |
---|
[661] | 218 | $this->query(sprintf("SET time_zone = '%s';", $this->getParam('timezone'))); |
---|
[654] | 219 | } |
---|
| 220 | |
---|
[1] | 221 | return true; |
---|
| 222 | } |
---|
[42] | 223 | |
---|
[1] | 224 | /** |
---|
| 225 | * Close db connection. |
---|
| 226 | * |
---|
| 227 | * @access public |
---|
| 228 | * @author Quinn Comendant <quinn@strangecode.com> |
---|
| 229 | * @since 28 Aug 2005 14:32:01 |
---|
| 230 | */ |
---|
[468] | 231 | public function close() |
---|
[1] | 232 | { |
---|
[136] | 233 | if (!$this->_connected) { |
---|
[1] | 234 | return false; |
---|
| 235 | } |
---|
[416] | 236 | $this->_connected = false; |
---|
[136] | 237 | return mysql_close($this->dbh); |
---|
[1] | 238 | } |
---|
[465] | 239 | |
---|
[230] | 240 | /* |
---|
[416] | 241 | * |
---|
[465] | 242 | * |
---|
[416] | 243 | * @access public |
---|
[465] | 244 | * @param |
---|
| 245 | * @return |
---|
[416] | 246 | * @author Quinn Comendant <quinn@strangecode.com> |
---|
| 247 | * @version 1.0 |
---|
| 248 | * @since 03 Jul 2013 14:50:23 |
---|
| 249 | */ |
---|
[468] | 250 | public function reconnect() |
---|
[416] | 251 | { |
---|
| 252 | $this->close(); |
---|
| 253 | $this->connect(); |
---|
| 254 | } |
---|
[465] | 255 | |
---|
[416] | 256 | /* |
---|
[230] | 257 | * Die only if db_die_on_failure is true. This will be set to false for some cases |
---|
| 258 | * when a database is not required for web app functionality. |
---|
| 259 | * |
---|
| 260 | * @access public |
---|
| 261 | * @param string $msg Print $msg when dying. |
---|
| 262 | * @return bool false If we don't die. |
---|
| 263 | * @author Quinn Comendant <quinn@strangecode.com> |
---|
| 264 | * @version 1.0 |
---|
| 265 | * @since 15 Jan 2007 15:59:00 |
---|
| 266 | */ |
---|
[484] | 267 | protected function _fail() |
---|
[230] | 268 | { |
---|
[547] | 269 | $app =& App::getInstance(); |
---|
| 270 | |
---|
[230] | 271 | if ($this->getParam('db_die_on_failure')) { |
---|
[665] | 272 | if (!$app->isCLI()) { |
---|
[484] | 273 | // For http requests, send a Service Unavailable header. |
---|
| 274 | header(' ', true, 503); |
---|
| 275 | echo _("This page is temporarily unavailable. Please try again in a few minutes."); |
---|
| 276 | } |
---|
[230] | 277 | die; |
---|
| 278 | } else { |
---|
| 279 | return false; |
---|
| 280 | } |
---|
| 281 | } |
---|
[42] | 282 | |
---|
[1] | 283 | /** |
---|
| 284 | * Return the current database handler. |
---|
| 285 | * |
---|
| 286 | * @access public |
---|
| 287 | * @return resource Current value of $this->dbh. |
---|
| 288 | * @author Quinn Comendant <quinn@strangecode.com> |
---|
| 289 | * @since 20 Aug 2005 13:50:36 |
---|
| 290 | */ |
---|
[468] | 291 | public function getDBH() |
---|
[1] | 292 | { |
---|
[136] | 293 | if (!$this->_connected) { |
---|
[1] | 294 | return false; |
---|
| 295 | } |
---|
| 296 | |
---|
[136] | 297 | return $this->dbh; |
---|
[1] | 298 | } |
---|
[42] | 299 | |
---|
[1] | 300 | /** |
---|
| 301 | * Returns connection status |
---|
| 302 | * |
---|
| 303 | * @access public |
---|
| 304 | * @author Quinn Comendant <quinn@strangecode.com> |
---|
| 305 | * @since 28 Aug 2005 14:58:09 |
---|
| 306 | */ |
---|
[468] | 307 | public function isConnected() |
---|
[1] | 308 | { |
---|
[136] | 309 | return (true === $this->_connected); |
---|
[1] | 310 | } |
---|
[465] | 311 | |
---|
[71] | 312 | /** |
---|
| 313 | * Returns a properly escaped string using mysql_real_escape_string() with the current connection's charset. |
---|
| 314 | * |
---|
| 315 | * @access public |
---|
| 316 | * @param string $string Input string to be sent as SQL query. |
---|
| 317 | * @return string Escaped string from mysql_real_escape_string() |
---|
| 318 | * @author Quinn Comendant <quinn@strangecode.com> |
---|
| 319 | * @since 06 Mar 2006 16:41:32 |
---|
| 320 | */ |
---|
[468] | 321 | public function escapeString($string) |
---|
[71] | 322 | { |
---|
[136] | 323 | if (!$this->_connected) { |
---|
| 324 | return false; |
---|
[71] | 325 | } |
---|
[136] | 326 | |
---|
| 327 | return mysql_real_escape_string($string, $this->dbh); |
---|
[71] | 328 | } |
---|
[42] | 329 | |
---|
[1] | 330 | /** |
---|
| 331 | * A wrapper for mysql_query. Allows us to set the database link_identifier, |
---|
| 332 | * to trap errors and ease debugging. |
---|
| 333 | * |
---|
| 334 | * @param string $query The SQL query to execute |
---|
| 335 | * @param bool $debug If true, prints debugging info |
---|
| 336 | * @return resource Query identifier |
---|
| 337 | */ |
---|
[468] | 338 | public function query($query, $debug=false) |
---|
[465] | 339 | { |
---|
[136] | 340 | $app =& App::getInstance(); |
---|
[42] | 341 | |
---|
[136] | 342 | if (!$this->_connected) { |
---|
[1] | 343 | return false; |
---|
| 344 | } |
---|
| 345 | |
---|
[172] | 346 | $this->_query_count++; |
---|
| 347 | |
---|
[1] | 348 | $debugqry = preg_replace("/\n[\t ]+/", "\n", $query); |
---|
[136] | 349 | if ($this->getParam('db_always_debug') || $debug) { |
---|
[679] | 350 | if ($debug > 1) { |
---|
| 351 | dump($debugqry, true, SC_DUMP_PRINT_R, __FILE__, __LINE__); |
---|
| 352 | } else { |
---|
| 353 | echo "<!-- ----------------- Query $this->_query_count ---------------------\n$debugqry\n-->\n"; |
---|
| 354 | } |
---|
[1] | 355 | } |
---|
[465] | 356 | |
---|
| 357 | // Ensure we have an active connection. |
---|
[419] | 358 | // If we continue on a dead connection we might experience a "MySQL server has gone away" error. |
---|
| 359 | // http://dev.mysql.com/doc/refman/5.0/en/gone-away.html |
---|
[416] | 360 | if (!mysql_ping($this->dbh)) { |
---|
[546] | 361 | $app->logMsg(sprintf('MySQL ping failed; reconnecting⊠("%s")', truncate(trim($debugqry), 150)), LOG_DEBUG, __FILE__, __LINE__); |
---|
[416] | 362 | $this->reconnect(); |
---|
| 363 | } |
---|
[42] | 364 | |
---|
[1] | 365 | // Execute! |
---|
[136] | 366 | $qid = mysql_query($query, $this->dbh); |
---|
[42] | 367 | |
---|
[1] | 368 | // Error checking. |
---|
[136] | 369 | if (!$qid || mysql_error($this->dbh)) { |
---|
[230] | 370 | $app->logMsg(sprintf('MySQL error %s: %s in query: %s', mysql_errno($this->dbh), mysql_error($this->dbh), $debugqry), LOG_EMERG, __FILE__, __LINE__); |
---|
[136] | 371 | if ($this->getParam('db_debug')) { |
---|
[665] | 372 | if (!$app->isCLI()) { |
---|
[484] | 373 | echo '<pre style="padding:2em; background:#ddd; font:9px monaco;">' . wordwrap(mysql_error($this->dbh)) . '<hr>' . htmlspecialchars($debugqry) . '</pre>'; |
---|
| 374 | } |
---|
[465] | 375 | } |
---|
[230] | 376 | // Die if db_die_on_failure = true, or just continue without connection |
---|
| 377 | return $this->_fail(); |
---|
[1] | 378 | } |
---|
[42] | 379 | |
---|
[1] | 380 | return $qid; |
---|
| 381 | } |
---|
| 382 | |
---|
| 383 | /** |
---|
[42] | 384 | * Loads a list of tables in the current database into an array, and returns |
---|
[1] | 385 | * true if the requested table is found. Use this function to enable/disable |
---|
[334] | 386 | * functionality based upon the current available db tables or to dynamically |
---|
[1] | 387 | * create tables if missing. |
---|
| 388 | * |
---|
[396] | 389 | * @param string $table The name of the table to search. |
---|
| 390 | * @param bool $use_cached_results Get fresh table info (in case DB changed). |
---|
| 391 | * @return bool true if given $table exists. |
---|
[1] | 392 | */ |
---|
[468] | 393 | public function tableExists($table, $use_cached_results=true) |
---|
[42] | 394 | { |
---|
[479] | 395 | $app =& App::getInstance(); |
---|
[465] | 396 | |
---|
[136] | 397 | if (!$this->_connected) { |
---|
[1] | 398 | return false; |
---|
| 399 | } |
---|
| 400 | |
---|
[630] | 401 | if (is_null(self::$existing_tables) || !$use_cached_results) { |
---|
| 402 | self::$existing_tables = array(); |
---|
[136] | 403 | $qid = $this->query("SHOW TABLES"); |
---|
[1] | 404 | while (list($row) = mysql_fetch_row($qid)) { |
---|
[630] | 405 | self::$existing_tables[] = $row; |
---|
[1] | 406 | } |
---|
| 407 | } |
---|
[630] | 408 | |
---|
| 409 | if (in_array($table, self::$existing_tables)) { |
---|
[1] | 410 | return true; |
---|
| 411 | } else { |
---|
[484] | 412 | $app->logMsg(sprintf('Nonexistent DB table: %s.%s', $this->getParam('db_name'), $table), LOG_INFO, __FILE__, __LINE__); |
---|
[1] | 413 | return false; |
---|
| 414 | } |
---|
| 415 | } |
---|
[42] | 416 | |
---|
[1] | 417 | /** |
---|
| 418 | * Tests if the given array of columns exists in the specified table. |
---|
| 419 | * |
---|
[396] | 420 | * @param string $table The name of the table to search. |
---|
| 421 | * @param array $columns An array of column names. |
---|
[550] | 422 | * @param bool $strict Exact schema match. If TRUE, test if *only* the given columns exist. If FALSE, test if given columns exist (possibly amongst others). |
---|
[396] | 423 | * @param bool $use_cached_results Get fresh table info (in case DB changed). |
---|
| 424 | * @return bool true if column(s) exist. |
---|
[1] | 425 | */ |
---|
[468] | 426 | public function columnExists($table, $columns, $strict=true, $use_cached_results=true) |
---|
[42] | 427 | { |
---|
[532] | 428 | $app =& App::getInstance(); |
---|
| 429 | |
---|
[136] | 430 | if (!$this->_connected) { |
---|
[532] | 431 | $app->logMsg(sprintf('No DB connection to run %s', __METHOD__), LOG_NOTICE, __FILE__, __LINE__); |
---|
[1] | 432 | return false; |
---|
| 433 | } |
---|
| 434 | |
---|
| 435 | // Ensure the table exists. |
---|
[136] | 436 | if (!$this->tableExists($table, $use_cached_results)) { |
---|
[575] | 437 | $app->logMsg(sprintf('Table does not exist: %s', $table), LOG_NOTICE, __FILE__, __LINE__); |
---|
[1] | 438 | return false; |
---|
| 439 | } |
---|
[42] | 440 | |
---|
[1] | 441 | // For single-value columns. |
---|
| 442 | if (!is_array($columns)) { |
---|
| 443 | $columns = array($columns); |
---|
| 444 | } |
---|
[42] | 445 | |
---|
[630] | 446 | if (!isset(self::$table_columns[$table]) || !$use_cached_results) { |
---|
[1] | 447 | // Populate and cache array of current columns for this table. |
---|
[630] | 448 | self::$table_columns[$table] = array(); |
---|
[136] | 449 | $qid = $this->query("DESCRIBE $table"); |
---|
[1] | 450 | while ($row = mysql_fetch_row($qid)) { |
---|
[630] | 451 | self::$table_columns[$table][] = $row[0]; |
---|
[1] | 452 | } |
---|
| 453 | } |
---|
[42] | 454 | |
---|
[1] | 455 | if ($strict) { |
---|
| 456 | // Do an exact comparison of table schemas. |
---|
| 457 | sort($columns); |
---|
[630] | 458 | sort(self::$table_columns[$table]); |
---|
| 459 | return self::$table_columns[$table] == $columns; |
---|
[1] | 460 | } else { |
---|
| 461 | // Only check that the specified columns are available in the table. |
---|
[630] | 462 | $match_columns = array_intersect(self::$table_columns[$table], $columns); |
---|
[1] | 463 | sort($columns); |
---|
| 464 | sort($match_columns); |
---|
| 465 | return $match_columns == $columns; |
---|
| 466 | } |
---|
| 467 | } |
---|
[465] | 468 | |
---|
[172] | 469 | /* |
---|
[396] | 470 | * Return the total number of queries executed thus far. |
---|
[172] | 471 | * |
---|
| 472 | * @access public |
---|
| 473 | * @return int Number of queries |
---|
| 474 | * @author Quinn Comendant <quinn@strangecode.com> |
---|
| 475 | * @version 1.0 |
---|
| 476 | * @since 15 Jun 2006 11:46:05 |
---|
| 477 | */ |
---|
[468] | 478 | public function numQueries() |
---|
[172] | 479 | { |
---|
| 480 | return $this->_query_count; |
---|
| 481 | } |
---|
[42] | 482 | |
---|
[1] | 483 | /** |
---|
| 484 | * Reset cached items. |
---|
| 485 | * |
---|
| 486 | * @access public |
---|
| 487 | * @author Quinn Comendant <quinn@strangecode.com> |
---|
| 488 | * @since 28 Aug 2005 22:10:50 |
---|
| 489 | */ |
---|
[468] | 490 | public function resetCache() |
---|
[1] | 491 | { |
---|
[630] | 492 | self::$existing_tables = null; |
---|
| 493 | self::$table_columns = null; |
---|
[1] | 494 | } |
---|
[42] | 495 | |
---|
[497] | 496 | /** |
---|
| 497 | * Returns the values of an ENUM or SET column, returning them as an array. |
---|
| 498 | * |
---|
| 499 | * @param string $db_table database table to lookup |
---|
| 500 | * @param string $db_col database column to lookup |
---|
| 501 | * @param bool $sort Sort the output. |
---|
| 502 | * @return array Array of the set/enum values on success, false on failure. |
---|
| 503 | */ |
---|
| 504 | public function getEnumValues($db_table, $db_col, $sort=false) |
---|
| 505 | { |
---|
| 506 | $app =& App::getInstance(); |
---|
| 507 | |
---|
| 508 | $qid = $this->query("SHOW COLUMNS FROM " . $this->escapeString($db_table) . " LIKE '" . $this->escapeString($db_col) . "'", false); |
---|
| 509 | |
---|
| 510 | $row = mysql_fetch_row($qid); |
---|
| 511 | if (preg_match('/^enum|^set/i', $row[1]) && preg_match_all("/'([^']*)'/", $row[1], $matches)) { |
---|
| 512 | if ($sort) { |
---|
| 513 | natsort($matches[1]); |
---|
| 514 | } |
---|
| 515 | return $matches[1]; |
---|
| 516 | } else { |
---|
| 517 | $app->logMsg(sprintf('No set or enum fields found in %s.%s', $db_table, $db_col), LOG_ERR, __FILE__, __LINE__); |
---|
| 518 | return false; |
---|
| 519 | } |
---|
| 520 | } |
---|
| 521 | |
---|
[1] | 522 | } // End. |
---|
| 523 | |
---|