[6] | 1 | <?php |
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| 2 | |
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| 3 | /** |
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| 4 | * Copyright (C) 2008-2011 FluxBB |
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| 5 | * based on code by Rickard Andersson copyright (C) 2002-2008 PunBB |
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| 6 | * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher |
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| 7 | */ |
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| 8 | |
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| 9 | // Make sure we have built in support for MySQL |
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| 10 | if (!function_exists('mysqli_connect')) |
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| 11 | exit('This PHP environment doesn\'t have Improved MySQL (mysqli) support built in. Improved MySQL support is required if you want to use a MySQL 4.1 (or later) database to run this forum. Consult the PHP documentation for further assistance.'); |
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| 12 | |
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| 13 | |
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| 14 | class DBLayer |
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| 15 | { |
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| 16 | var $prefix; |
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| 17 | var $link_id; |
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| 18 | var $query_result; |
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| 19 | |
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| 20 | var $saved_queries = array(); |
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| 21 | var $num_queries = 0; |
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| 22 | |
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| 23 | var $error_no = false; |
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| 24 | var $error_msg = 'Unknown'; |
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| 25 | |
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| 26 | var $datatype_transformations = array( |
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| 27 | '%^SERIAL$%' => 'INT(10) UNSIGNED AUTO_INCREMENT' |
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| 28 | ); |
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| 29 | |
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| 30 | |
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| 31 | function DBLayer($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect) |
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| 32 | { |
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| 33 | $this->prefix = $db_prefix; |
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| 34 | |
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| 35 | // Was a custom port supplied with $db_host? |
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| 36 | if (strpos($db_host, ':') !== false) |
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| 37 | list($db_host, $db_port) = explode(':', $db_host); |
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| 38 | |
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| 39 | // Persistent connection in MySQLi are only available in PHP 5.3 and later releases |
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| 40 | $p_connect = $p_connect && version_compare(PHP_VERSION, '5.3.0', '>=') ? 'p:' : ''; |
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| 41 | |
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| 42 | if (isset($db_port)) |
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| 43 | $this->link_id = @mysqli_connect($p_connect.$db_host, $db_username, $db_password, $db_name, $db_port); |
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| 44 | else |
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| 45 | $this->link_id = @mysqli_connect($p_connect.$db_host, $db_username, $db_password, $db_name); |
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| 46 | |
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| 47 | if (!$this->link_id) |
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| 48 | error('Unable to connect to MySQL and select database. MySQL reported: '.mysqli_connect_error(), __FILE__, __LINE__); |
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| 49 | |
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| 50 | // Setup the client-server character set (UTF-8) |
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| 51 | if (!defined('FORUM_NO_SET_NAMES')) |
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| 52 | $this->set_names('utf8'); |
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| 53 | |
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| 54 | return $this->link_id; |
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| 55 | } |
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| 56 | |
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| 57 | |
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| 58 | function start_transaction() |
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| 59 | { |
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| 60 | return; |
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| 61 | } |
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| 62 | |
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| 63 | |
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| 64 | function end_transaction() |
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| 65 | { |
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| 66 | return; |
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| 67 | } |
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| 68 | |
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| 69 | |
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| 70 | function query($sql, $unbuffered = false) |
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| 71 | { |
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| 72 | if (defined('PUN_SHOW_QUERIES')) |
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| 73 | $q_start = get_microtime(); |
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| 74 | |
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| 75 | $this->query_result = @mysqli_query($this->link_id, $sql); |
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| 76 | |
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| 77 | if ($this->query_result) |
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| 78 | { |
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| 79 | if (defined('PUN_SHOW_QUERIES')) |
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| 80 | $this->saved_queries[] = array($sql, sprintf('%.5f', get_microtime() - $q_start)); |
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| 81 | |
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| 82 | ++$this->num_queries; |
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| 83 | |
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| 84 | return $this->query_result; |
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| 85 | } |
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| 86 | else |
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| 87 | { |
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| 88 | if (defined('PUN_SHOW_QUERIES')) |
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| 89 | $this->saved_queries[] = array($sql, 0); |
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| 90 | |
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| 91 | $this->error_no = @mysqli_errno($this->link_id); |
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| 92 | $this->error_msg = @mysqli_error($this->link_id); |
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| 93 | |
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| 94 | return false; |
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| 95 | } |
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| 96 | } |
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| 97 | |
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| 98 | |
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| 99 | function result($query_id = 0, $row = 0, $col = 0) |
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| 100 | { |
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| 101 | if ($query_id) |
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| 102 | { |
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| 103 | if ($row !== 0 && @mysqli_data_seek($query_id, $row) === false) |
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| 104 | return false; |
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| 105 | |
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| 106 | $cur_row = @mysqli_fetch_row($query_id); |
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| 107 | if ($cur_row === false) |
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| 108 | return false; |
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| 109 | |
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| 110 | return $cur_row[$col]; |
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| 111 | } |
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| 112 | else |
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| 113 | return false; |
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| 114 | } |
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| 115 | |
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| 116 | |
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| 117 | function fetch_assoc($query_id = 0) |
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| 118 | { |
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| 119 | return ($query_id) ? @mysqli_fetch_assoc($query_id) : false; |
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| 120 | } |
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| 121 | |
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| 122 | |
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| 123 | function fetch_row($query_id = 0) |
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| 124 | { |
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| 125 | return ($query_id) ? @mysqli_fetch_row($query_id) : false; |
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| 126 | } |
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| 127 | |
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| 128 | |
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| 129 | function num_rows($query_id = 0) |
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| 130 | { |
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| 131 | return ($query_id) ? @mysqli_num_rows($query_id) : false; |
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| 132 | } |
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| 133 | |
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| 134 | |
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| 135 | function affected_rows() |
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| 136 | { |
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| 137 | return ($this->link_id) ? @mysqli_affected_rows($this->link_id) : false; |
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| 138 | } |
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| 139 | |
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| 140 | |
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| 141 | function insert_id() |
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| 142 | { |
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| 143 | return ($this->link_id) ? @mysqli_insert_id($this->link_id) : false; |
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| 144 | } |
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| 145 | |
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| 146 | |
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| 147 | function get_num_queries() |
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| 148 | { |
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| 149 | return $this->num_queries; |
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| 150 | } |
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| 151 | |
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| 152 | |
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| 153 | function get_saved_queries() |
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| 154 | { |
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| 155 | return $this->saved_queries; |
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| 156 | } |
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| 157 | |
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| 158 | |
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| 159 | function free_result($query_id = false) |
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| 160 | { |
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| 161 | return ($query_id) ? @mysqli_free_result($query_id) : false; |
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| 162 | } |
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| 163 | |
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| 164 | |
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| 165 | function escape($str) |
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| 166 | { |
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| 167 | return is_array($str) ? '' : mysqli_real_escape_string($this->link_id, $str); |
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| 168 | } |
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| 169 | |
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| 170 | |
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| 171 | function error() |
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| 172 | { |
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| 173 | $result['error_sql'] = @current(@end($this->saved_queries)); |
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| 174 | $result['error_no'] = $this->error_no; |
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| 175 | $result['error_msg'] = $this->error_msg; |
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| 176 | |
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| 177 | return $result; |
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| 178 | } |
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| 179 | |
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| 180 | |
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| 181 | function close() |
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| 182 | { |
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| 183 | if ($this->link_id) |
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| 184 | { |
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| 185 | if ($this->query_result) |
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| 186 | @mysqli_free_result($this->query_result); |
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| 187 | |
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| 188 | return @mysqli_close($this->link_id); |
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| 189 | } |
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| 190 | else |
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| 191 | return false; |
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| 192 | } |
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| 193 | |
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| 194 | |
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| 195 | function get_names() |
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| 196 | { |
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| 197 | $result = $this->query('SHOW VARIABLES LIKE \'character_set_connection\''); |
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| 198 | return $this->result($result, 0, 1); |
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| 199 | } |
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| 200 | |
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| 201 | |
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| 202 | function set_names($names) |
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| 203 | { |
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| 204 | return $this->query('SET NAMES \''.$this->escape($names).'\''); |
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| 205 | } |
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| 206 | |
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| 207 | |
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| 208 | function get_version() |
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| 209 | { |
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| 210 | $result = $this->query('SELECT VERSION()'); |
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| 211 | |
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| 212 | return array( |
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| 213 | 'name' => 'MySQL Improved', |
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| 214 | 'version' => preg_replace('%^([^-]+).*$%', '\\1', $this->result($result)) |
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| 215 | ); |
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| 216 | } |
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| 217 | |
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| 218 | |
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| 219 | function table_exists($table_name, $no_prefix = false) |
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| 220 | { |
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| 221 | $result = $this->query('SHOW TABLES LIKE \''.($no_prefix ? '' : $this->prefix).$this->escape($table_name).'\''); |
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| 222 | return $this->num_rows($result) > 0; |
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| 223 | } |
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| 224 | |
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| 225 | |
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| 226 | function field_exists($table_name, $field_name, $no_prefix = false) |
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| 227 | { |
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| 228 | $result = $this->query('SHOW COLUMNS FROM '.($no_prefix ? '' : $this->prefix).$table_name.' LIKE \''.$this->escape($field_name).'\''); |
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| 229 | return $this->num_rows($result) > 0; |
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| 230 | } |
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| 231 | |
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| 232 | |
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| 233 | function index_exists($table_name, $index_name, $no_prefix = false) |
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| 234 | { |
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| 235 | $exists = false; |
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| 236 | |
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| 237 | $result = $this->query('SHOW INDEX FROM '.($no_prefix ? '' : $this->prefix).$table_name); |
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| 238 | while ($cur_index = $this->fetch_assoc($result)) |
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| 239 | { |
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| 240 | if (strtolower($cur_index['Key_name']) == strtolower(($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name)) |
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| 241 | { |
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| 242 | $exists = true; |
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| 243 | break; |
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| 244 | } |
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| 245 | } |
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| 246 | |
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| 247 | return $exists; |
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| 248 | } |
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| 249 | |
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| 250 | |
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| 251 | function create_table($table_name, $schema, $no_prefix = false) |
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| 252 | { |
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| 253 | if ($this->table_exists($table_name, $no_prefix)) |
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| 254 | return true; |
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| 255 | |
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| 256 | $query = 'CREATE TABLE '.($no_prefix ? '' : $this->prefix).$table_name." (\n"; |
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| 257 | |
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| 258 | // Go through every schema element and add it to the query |
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| 259 | foreach ($schema['FIELDS'] as $field_name => $field_data) |
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| 260 | { |
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| 261 | $field_data['datatype'] = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_data['datatype']); |
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| 262 | |
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| 263 | $query .= $field_name.' '.$field_data['datatype']; |
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| 264 | |
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| 265 | if (isset($field_data['collation'])) |
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| 266 | $query .= 'CHARACTER SET utf8 COLLATE utf8_'.$field_data['collation']; |
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| 267 | |
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| 268 | if (!$field_data['allow_null']) |
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| 269 | $query .= ' NOT NULL'; |
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| 270 | |
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| 271 | if (isset($field_data['default'])) |
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| 272 | $query .= ' DEFAULT '.$field_data['default']; |
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| 273 | |
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| 274 | $query .= ",\n"; |
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| 275 | } |
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| 276 | |
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| 277 | // If we have a primary key, add it |
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| 278 | if (isset($schema['PRIMARY KEY'])) |
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| 279 | $query .= 'PRIMARY KEY ('.implode(',', $schema['PRIMARY KEY']).'),'."\n"; |
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| 280 | |
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| 281 | // Add unique keys |
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| 282 | if (isset($schema['UNIQUE KEYS'])) |
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| 283 | { |
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| 284 | foreach ($schema['UNIQUE KEYS'] as $key_name => $key_fields) |
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| 285 | $query .= 'UNIQUE KEY '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$key_name.'('.implode(',', $key_fields).'),'."\n"; |
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| 286 | } |
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| 287 | |
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| 288 | // Add indexes |
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| 289 | if (isset($schema['INDEXES'])) |
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| 290 | { |
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| 291 | foreach ($schema['INDEXES'] as $index_name => $index_fields) |
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| 292 | $query .= 'KEY '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name.'('.implode(',', $index_fields).'),'."\n"; |
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| 293 | } |
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| 294 | |
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| 295 | // We remove the last two characters (a newline and a comma) and add on the ending |
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| 296 | $query = substr($query, 0, strlen($query) - 2)."\n".') ENGINE = '.(isset($schema['ENGINE']) ? $schema['ENGINE'] : 'MyISAM').' CHARACTER SET utf8'; |
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| 297 | |
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| 298 | return $this->query($query) ? true : false; |
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| 299 | } |
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| 300 | |
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| 301 | |
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| 302 | function drop_table($table_name, $no_prefix = false) |
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| 303 | { |
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| 304 | if (!$this->table_exists($table_name, $no_prefix)) |
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| 305 | return true; |
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| 306 | |
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| 307 | return $this->query('DROP TABLE '.($no_prefix ? '' : $this->prefix).$table_name) ? true : false; |
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| 308 | } |
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| 309 | |
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| 310 | |
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| 311 | function rename_table($old_table, $new_table, $no_prefix = false) |
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| 312 | { |
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| 313 | // If there new table exists and the old one doesn't, then we're happy |
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| 314 | if ($this->table_exists($new_table, $no_prefix) && !$this->table_exists($old_table, $no_prefix)) |
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| 315 | return true; |
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| 316 | |
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| 317 | return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$old_table.' RENAME TO '.($no_prefix ? '' : $this->prefix).$new_table) ? true : false; |
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| 318 | } |
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| 319 | |
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| 320 | |
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| 321 | function add_field($table_name, $field_name, $field_type, $allow_null, $default_value = null, $after_field = null, $no_prefix = false) |
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| 322 | { |
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| 323 | if ($this->field_exists($table_name, $field_name, $no_prefix)) |
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| 324 | return true; |
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| 325 | |
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| 326 | $field_type = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_type); |
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| 327 | |
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| 328 | if ($default_value !== null && !is_int($default_value) && !is_float($default_value)) |
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| 329 | $default_value = '\''.$this->escape($default_value).'\''; |
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| 330 | |
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| 331 | return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' ADD '.$field_name.' '.$field_type.($allow_null ? ' ' : ' NOT NULL').($default_value !== null ? ' DEFAULT '.$default_value : ' ').($after_field != null ? ' AFTER '.$after_field : '')) ? true : false; |
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| 332 | } |
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| 333 | |
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| 334 | |
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| 335 | function alter_field($table_name, $field_name, $field_type, $allow_null, $default_value = null, $after_field = null, $no_prefix = false) |
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| 336 | { |
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| 337 | if (!$this->field_exists($table_name, $field_name, $no_prefix)) |
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| 338 | return true; |
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| 339 | |
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| 340 | $field_type = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_type); |
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| 341 | |
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| 342 | if ($default_value !== null && !is_int($default_value) && !is_float($default_value)) |
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| 343 | $default_value = '\''.$this->escape($default_value).'\''; |
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| 344 | |
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| 345 | return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' MODIFY '.$field_name.' '.$field_type.($allow_null ? ' ' : ' NOT NULL').($default_value !== null ? ' DEFAULT '.$default_value : ' ').($after_field != null ? ' AFTER '.$after_field : '')) ? true : false; |
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| 346 | } |
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| 347 | |
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| 348 | |
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| 349 | function drop_field($table_name, $field_name, $no_prefix = false) |
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| 350 | { |
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| 351 | if (!$this->field_exists($table_name, $field_name, $no_prefix)) |
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| 352 | return true; |
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| 353 | |
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| 354 | return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' DROP '.$field_name) ? true : false; |
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| 355 | } |
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| 356 | |
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| 357 | |
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| 358 | function add_index($table_name, $index_name, $index_fields, $unique = false, $no_prefix = false) |
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| 359 | { |
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| 360 | if ($this->index_exists($table_name, $index_name, $no_prefix)) |
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| 361 | return true; |
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| 362 | |
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| 363 | return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' ADD '.($unique ? 'UNIQUE ' : '').'INDEX '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name.' ('.implode(',', $index_fields).')') ? true : false; |
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| 364 | } |
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| 365 | |
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| 366 | |
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| 367 | function drop_index($table_name, $index_name, $no_prefix = false) |
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| 368 | { |
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| 369 | if (!$this->index_exists($table_name, $index_name, $no_prefix)) |
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| 370 | return true; |
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| 371 | |
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| 372 | return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' DROP INDEX '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name) ? true : false; |
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| 373 | } |
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| 374 | |
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| 375 | function truncate_table($table_name, $no_prefix = false) |
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| 376 | { |
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| 377 | return $this->query('TRUNCATE TABLE '.($no_prefix ? '' : $this->prefix).$table_name) ? true : false; |
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| 378 | } |
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| 379 | } |
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