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| -rw-r--r-- | include/dblayer/mysql.php | 378 |
diff --git a/include/dblayer/mysql.php b/include/dblayer/mysql.php new file mode 100644 index 0000000..1b36648 --- /dev/null +++ b/include/dblayer/mysql.php @@ -0,0 +1,378 @@ +<?php + +/** + * Copyright (C) 2008-2012 FluxBB + * based on code by Rickard Andersson copyright (C) 2002-2008 PunBB + * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher + */ + +// Make sure we have built in support for MySQL +if (!function_exists('mysql_connect')) + exit('This PHP environment doesn\'t have MySQL support built in. MySQL support is required if you want to use a MySQL database to run this forum. Consult the PHP documentation for further assistance.'); + + +class DBLayer +{ + var $prefix; + var $link_id; + var $query_result; + + var $saved_queries = array(); + var $num_queries = 0; + + var $error_no = false; + var $error_msg = 'Unknown'; + + var $datatype_transformations = array( + '%^SERIAL$%' => 'INT(10) UNSIGNED AUTO_INCREMENT' + ); + + + function __construct($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect) + { + $this->prefix = $db_prefix; + + if ($p_connect) + $this->link_id = @mysql_pconnect($db_host, $db_username, $db_password); + else + $this->link_id = @mysql_connect($db_host, $db_username, $db_password); + + if ($this->link_id) + { + if (!@mysql_select_db($db_name, $this->link_id)) + error('Unable to select database. MySQL reported: '.mysql_error(), __FILE__, __LINE__); + } + else + error('Unable to connect to MySQL server. MySQL reported: '.mysql_error(), __FILE__, __LINE__); + + // Setup the client-server character set (UTF-8) + if (!defined('FORUM_NO_SET_NAMES')) + $this->set_names('utf8'); + + return $this->link_id; + } + + + function DBLayer($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect) + { + $this->__construct($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect); + } + + + function start_transaction() + { + return; + } + + + function end_transaction() + { + return; + } + + + function query($sql, $unbuffered = false) + { + if (defined('PUN_SHOW_QUERIES')) + $q_start = get_microtime(); + + if ($unbuffered) + $this->query_result = @mysql_unbuffered_query($sql, $this->link_id); + else + $this->query_result = @mysql_query($sql, $this->link_id); + + if ($this->query_result) + { + if (defined('PUN_SHOW_QUERIES')) + $this->saved_queries[] = array($sql, sprintf('%.5F', get_microtime() - $q_start)); + + ++$this->num_queries; + + return $this->query_result; + } + else + { + if (defined('PUN_SHOW_QUERIES')) + $this->saved_queries[] = array($sql, 0); + + $this->error_no = @mysql_errno($this->link_id); + $this->error_msg = @mysql_error($this->link_id); + + return false; + } + } + + + function result($query_id = 0, $row = 0, $col = 0) + { + return ($query_id) ? @mysql_result($query_id, $row, $col) : false; + } + + + function fetch_assoc($query_id = 0) + { + return ($query_id) ? @mysql_fetch_assoc($query_id) : false; + } + + + function fetch_row($query_id = 0) + { + return ($query_id) ? @mysql_fetch_row($query_id) : false; + } + + + function num_rows($query_id = 0) + { + return ($query_id) ? @mysql_num_rows($query_id) : false; + } + + + function affected_rows() + { + return ($this->link_id) ? @mysql_affected_rows($this->link_id) : false; + } + + + function insert_id() + { + return ($this->link_id) ? @mysql_insert_id($this->link_id) : false; + } + + + function get_num_queries() + { + return $this->num_queries; + } + + + function get_saved_queries() + { + return $this->saved_queries; + } + + + function free_result($query_id = false) + { + return ($query_id) ? @mysql_free_result($query_id) : false; + } + + + function escape($str) + { + if (is_array($str)) + return ''; + else if (function_exists('mysql_real_escape_string')) + return mysql_real_escape_string($str, $this->link_id); + else + return mysql_escape_string($str); + } + + + function error() + { + $result['error_sql'] = @current(@end($this->saved_queries)); + $result['error_no'] = $this->error_no; + $result['error_msg'] = $this->error_msg; + + return $result; + } + + + function close() + { + if ($this->link_id) + { + if (is_resource($this->query_result)) + @mysql_free_result($this->query_result); + + return @mysql_close($this->link_id); + } + else + return false; + } + + function get_names() + { + $result = $this->query('SHOW VARIABLES LIKE \'character_set_connection\''); + return $this->result($result, 0, 1); + } + + + function set_names($names) + { + return $this->query('SET NAMES \''.$this->escape($names).'\''); + } + + + function get_version() + { + $result = $this->query('SELECT VERSION()'); + + return array( + 'name' => 'MySQL Standard', + 'version' => preg_replace('%^([^-]+).*$%', '\\1', $this->result($result)) + ); + } + + + function table_exists($table_name, $no_prefix = false) + { + $result = $this->query('SHOW TABLES LIKE \''.($no_prefix ? '' : $this->prefix).$this->escape($table_name).'\''); + return $this->num_rows($result) > 0; + } + + + function field_exists($table_name, $field_name, $no_prefix = false) + { + $result = $this->query('SHOW COLUMNS FROM '.($no_prefix ? '' : $this->prefix).$table_name.' LIKE \''.$this->escape($field_name).'\''); + return $this->num_rows($result) > 0; + } + + + function index_exists($table_name, $index_name, $no_prefix = false) + { + $exists = false; + + $result = $this->query('SHOW INDEX FROM '.($no_prefix ? '' : $this->prefix).$table_name); + while ($cur_index = $this->fetch_assoc($result)) + { + if (strtolower($cur_index['Key_name']) == strtolower(($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name)) + { + $exists = true; + break; + } + } + + return $exists; + } + + + function create_table($table_name, $schema, $no_prefix = false) + { + if ($this->table_exists($table_name, $no_prefix)) + return true; + + $query = 'CREATE TABLE '.($no_prefix ? '' : $this->prefix).$table_name." (\n"; + + // Go through every schema element and add it to the query + foreach ($schema['FIELDS'] as $field_name => $field_data) + { + $field_data['datatype'] = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_data['datatype']); + + $query .= $field_name.' '.$field_data['datatype']; + + if (isset($field_data['collation'])) + $query .= 'CHARACTER SET utf8 COLLATE utf8_'.$field_data['collation']; + + if (!$field_data['allow_null']) + $query .= ' NOT NULL'; + + if (isset($field_data['default'])) + $query .= ' DEFAULT '.$field_data['default']; + + $query .= ",\n"; + } + + // If we have a primary key, add it + if (isset($schema['PRIMARY KEY'])) + $query .= 'PRIMARY KEY ('.implode(',', $schema['PRIMARY KEY']).'),'."\n"; + + // Add unique keys + if (isset($schema['UNIQUE KEYS'])) + { + foreach ($schema['UNIQUE KEYS'] as $key_name => $key_fields) + $query .= 'UNIQUE KEY '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$key_name.'('.implode(',', $key_fields).'),'."\n"; + } + + // Add indexes + if (isset($schema['INDEXES'])) + { + foreach ($schema['INDEXES'] as $index_name => $index_fields) + $query .= 'KEY '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name.'('.implode(',', $index_fields).'),'."\n"; + } + + // We remove the last two characters (a newline and a comma) and add on the ending + $query = substr($query, 0, strlen($query) - 2)."\n".') ENGINE = '.(isset($schema['ENGINE']) ? $schema['ENGINE'] : 'MyISAM').' CHARACTER SET utf8'; + + return $this->query($query) ? true : false; + } + + + function drop_table($table_name, $no_prefix = false) + { + if (!$this->table_exists($table_name, $no_prefix)) + return true; + + return $this->query('DROP TABLE '.($no_prefix ? '' : $this->prefix).$table_name) ? true : false; + } + + + function rename_table($old_table, $new_table, $no_prefix = false) + { + // If the new table exists and the old one doesn't, then we're happy + if ($this->table_exists($new_table, $no_prefix) && !$this->table_exists($old_table, $no_prefix)) + return true; + + return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$old_table.' RENAME TO '.($no_prefix ? '' : $this->prefix).$new_table) ? true : false; + } + + + function add_field($table_name, $field_name, $field_type, $allow_null, $default_value = null, $after_field = null, $no_prefix = false) + { + if ($this->field_exists($table_name, $field_name, $no_prefix)) + return true; + + $field_type = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_type); + + if (!is_null($default_value) && !is_int($default_value) && !is_float($default_value)) + $default_value = '\''.$this->escape($default_value).'\''; + + return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' ADD '.$field_name.' '.$field_type.($allow_null ? '' : ' NOT NULL').(!is_null($default_value) ? ' DEFAULT '.$default_value : '').(!is_null($after_field) ? ' AFTER '.$after_field : '')) ? true : false; + } + + + function alter_field($table_name, $field_name, $field_type, $allow_null, $default_value = null, $after_field = null, $no_prefix = false) + { + if (!$this->field_exists($table_name, $field_name, $no_prefix)) + return true; + + $field_type = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_type); + + if (!is_null($default_value) && !is_int($default_value) && !is_float($default_value)) + $default_value = '\''.$this->escape($default_value).'\''; + + return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' MODIFY '.$field_name.' '.$field_type.($allow_null ? '' : ' NOT NULL').(!is_null($default_value) ? ' DEFAULT '.$default_value : '').(!is_null($after_field) ? ' AFTER '.$after_field : '')) ? true : false; + } + + + function drop_field($table_name, $field_name, $no_prefix = false) + { + if (!$this->field_exists($table_name, $field_name, $no_prefix)) + return true; + + return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' DROP '.$field_name) ? true : false; + } + + + function add_index($table_name, $index_name, $index_fields, $unique = false, $no_prefix = false) + { + if ($this->index_exists($table_name, $index_name, $no_prefix)) + return true; + + return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' ADD '.($unique ? 'UNIQUE ' : '').'INDEX '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name.' ('.implode(',', $index_fields).')') ? true : false; + } + + + function drop_index($table_name, $index_name, $no_prefix = false) + { + if (!$this->index_exists($table_name, $index_name, $no_prefix)) + return true; + + return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' DROP INDEX '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name) ? true : false; + } + + function truncate_table($table_name, $no_prefix = false) + { + return $this->query('TRUNCATE TABLE '.($no_prefix ? '' : $this->prefix).$table_name) ? true : false; + } +} |