GIF89a;
Direktori : /home/serb/public_html/phpchat/upload/db/ |
Current File : /home/serb/public_html/phpchat/upload/db/mysql.php |
<?php include_once('dbal.php'); /** * MySQL Database Abstraction Layer * Compatible with: * MySQL 3.23+ * MySQL 4.0+ * MySQL 4.1+ * MySQL 5.0+ * @package dbal */ class dbal_mysql extends dbal { var $multi_insert = true; /** * Connect to server * @access public */ function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false) { $this->persistency = $persistency; $this->user = $sqluser; $this->server = $sqlserver . (($port) ? ':' . $port : ''); $this->dbname = $database; $this->sql_layer = 'mysql'; $this->db_connect_id = ($this->persistency) ? @mysql_pconnect($this->server, $this->user, $sqlpassword, $new_link) : @mysql_connect($this->server, $this->user, $sqlpassword, $new_link); if ($this->db_connect_id && $this->dbname != '') { if (@mysql_select_db($this->dbname, $this->db_connect_id)) { // Determine what version we are using and if it natively supports UNICODE if (version_compare($this->sql_server_info(true), '4.1.3', '>=')) { @mysql_query("SET NAMES 'utf8'", $this->db_connect_id); // enforce strict mode on databases that support it if (version_compare($this->sql_server_info(true), '5.0.2', '>=')) { $result = @mysql_query('SELECT @@session.sql_mode AS sql_mode', $this->db_connect_id); $row = @mysql_fetch_assoc($result); @mysql_free_result($result); $modes = array_map('trim', explode(',', $row['sql_mode'])); // TRADITIONAL includes STRICT_ALL_TABLES and STRICT_TRANS_TABLES if (!in_array('TRADITIONAL', $modes)) { if (!in_array('STRICT_ALL_TABLES', $modes)) { $modes[] = 'STRICT_ALL_TABLES'; } if (!in_array('STRICT_TRANS_TABLES', $modes)) { $modes[] = 'STRICT_TRANS_TABLES'; } } $mode = implode(',', $modes); @mysql_query("SET SESSION sql_mode='{$mode}'", $this->db_connect_id); } } else if (version_compare($this->sql_server_info(true), '4.0.0', '<')) { $this->sql_layer = 'mysql'; } return $this->db_connect_id; } } return $this->sql_error(''); } /** * Version information about used database * @param bool $raw if true, only return the fetched sql_server_version * @return string sql server version */ function sql_server_info($raw = false) { global $cache; if (empty($cache) || ($this->sql_server_version = $cache->get('mysql_version')) === false) { $result = @mysql_query('SELECT VERSION() AS version', $this->db_connect_id); $row = @mysql_fetch_assoc($result); @mysql_free_result($result); $this->sql_server_version = $row['version']; if (!empty($cache)) { $cache->put('mysql_version', $this->sql_server_version); } } return ($raw) ? $this->sql_server_version : 'MySQL ' . $this->sql_server_version; } /** * SQL Transaction * @access private */ function _sql_transaction($status = 'begin') { switch ($status) { case 'begin': return @mysql_query('BEGIN', $this->db_connect_id); break; case 'commit': return @mysql_query('COMMIT', $this->db_connect_id); break; case 'rollback': return @mysql_query('ROLLBACK', $this->db_connect_id); break; } return true; } /** * Base query method * * @param string $query Contains the SQL query which shall be executed * @param int $cache_ttl Either 0 to avoid caching or the time in seconds which the result shall be kept cache * @return mixed When casted to bool the returned value returns true on success and false on failure * * @access public */ function sql_query($query = '', $cache_ttl = 0) { if ($query != '') { global $cache; // EXPLAIN only in extra debug mode if (defined('DEBUG_EXTRA')) { $this->sql_report('start', $query); } $this->query_result = ($cache_ttl && method_exists($cache, 'sql_load')) ? $cache->sql_load($query) : false; $this->sql_add_num_queries($this->query_result); if ($this->query_result === false) { if (($this->query_result = @mysql_query($query, $this->db_connect_id)) === false) { $this->sql_error($query); } if (defined('DEBUG_EXTRA')) { $this->sql_report('stop', $query); } if ($cache_ttl && method_exists($cache, 'sql_save')) { $this->open_queries[(int) $this->query_result] = $this->query_result; $cache->sql_save($query, $this->query_result, $cache_ttl); } else if (strpos($query, 'SELECT') === 0 && $this->query_result) { $this->open_queries[(int) $this->query_result] = $this->query_result; } } else if (defined('DEBUG_EXTRA')) { $this->sql_report('fromcache', $query); } } else { return false; } return $this->query_result; } /** * Build LIMIT query */ function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0) { $this->query_result = false; // if $total is set to 0 we do not want to limit the number of rows if ($total == 0) { // Having a value of -1 was always a bug $total = '18446744073709551615'; } $query .= "\n LIMIT " . ((!empty($offset)) ? $offset . ', ' . $total : $total); return $this->sql_query($query, $cache_ttl); } /** * Return number of affected rows */ function sql_affectedrows() { return ($this->db_connect_id) ? @mysql_affected_rows($this->db_connect_id) : false; } /** * Fetch current row */ function sql_fetchrow($query_id = false) { global $cache; if ($query_id === false) { $query_id = $this->query_result; } if (isset($cache->sql_rowset[$query_id])) { return $cache->sql_fetchrow($query_id); } return ($query_id !== false) ? @mysql_fetch_assoc($query_id) : false; } /** * Seek to given row number * rownum is zero-based */ function sql_rowseek($rownum, &$query_id) { global $cache; if ($query_id === false) { $query_id = $this->query_result; } if (isset($cache->sql_rowset[$query_id])) { return $cache->sql_rowseek($rownum, $query_id); } return ($query_id !== false) ? @mysql_data_seek($query_id, $rownum) : false; } /** * Get last inserted id after insert statement */ function sql_nextid() { return ($this->db_connect_id) ? @mysql_insert_id($this->db_connect_id) : false; } /** * Free sql result */ function sql_freeresult($query_id = false) { global $cache; if ($query_id === false) { $query_id = $this->query_result; } if (isset($cache->sql_rowset[$query_id])) { return $cache->sql_freeresult($query_id); } if (isset($this->open_queries[(int) $query_id])) { unset($this->open_queries[(int) $query_id]); return @mysql_free_result($query_id); } return false; } /** * Escape string used in sql query */ function sql_escape($msg) { if (!$this->db_connect_id) { return @mysql_real_escape_string($msg); } return @mysql_real_escape_string($msg, $this->db_connect_id); } /** * Build LIKE expression * @access private */ function _sql_like_expression($expression) { return $expression; } /** * Build db-specific query data * @access private */ function _sql_custom_build($stage, $data) { switch ($stage) { case 'FROM': $data = '(' . $data . ')'; break; } return $data; } /** * return sql error array * @access private */ function _sql_error() { if (!$this->db_connect_id) { return array( 'message' => @mysql_error(), 'code' => @mysql_errno() ); } return array( 'message' => @mysql_error($this->db_connect_id), 'code' => @mysql_errno($this->db_connect_id) ); } /** * Close sql connection * @access private */ function _sql_close() { return @mysql_close($this->db_connect_id); } /** * Build db-specific report * @access private */ function _sql_report($mode, $query = '') { static $test_prof; // current detection method, might just switch to see the existance of INFORMATION_SCHEMA.PROFILING if ($test_prof === null) { $test_prof = false; if (version_compare($this->sql_server_info(true), '5.0.37', '>=') && version_compare($this->sql_server_info(true), '5.1', '<')) { $test_prof = true; } } switch ($mode) { case 'start': $explain_query = $query; if (preg_match('/UPDATE ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m)) { $explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2]; } else if (preg_match('/DELETE FROM ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m)) { $explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2]; } if (preg_match('/^SELECT/', $explain_query)) { $html_table = false; // begin profiling if ($test_prof) { @mysql_query('SET profiling = 1;', $this->db_connect_id); } if ($result = @mysql_query("EXPLAIN $explain_query", $this->db_connect_id)) { while ($row = @mysql_fetch_assoc($result)) { $html_table = $this->sql_report('add_select_row', $query, $html_table, $row); } } @mysql_free_result($result); if ($html_table) { $this->html_hold .= '</table>'; } if ($test_prof) { $html_table = false; // get the last profile if ($result = @mysql_query('SHOW PROFILE ALL;', $this->db_connect_id)) { $this->html_hold .= '<br />'; while ($row = @mysql_fetch_assoc($result)) { // make <unknown> HTML safe if (!empty($row['Source_function'])) { $row['Source_function'] = str_replace(array('<', '>'), array('<', '>'), $row['Source_function']); } // remove unsupported features foreach ($row as $key => $val) { if ($val === null) { unset($row[$key]); } } $html_table = $this->sql_report('add_select_row', $query, $html_table, $row); } } @mysql_free_result($result); if ($html_table) { $this->html_hold .= '</table>'; } @mysql_query('SET profiling = 0;', $this->db_connect_id); } } break; case 'fromcache': $endtime = explode(' ', microtime()); $endtime = $endtime[0] + $endtime[1]; $result = @mysql_query($query, $this->db_connect_id); while ($void = @mysql_fetch_assoc($result)) { // Take the time spent on parsing rows into account } @mysql_free_result($result); $splittime = explode(' ', microtime()); $splittime = $splittime[0] + $splittime[1]; $this->sql_report('record_fromcache', $query, $endtime, $splittime); break; } } } ?>