1 | <?php
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2 | /**
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3 | *
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4 | * @package dbal
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5 | * @version $Id: mysqli.php 8814 2008-09-04 12:01:47Z acydburn $
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6 | * @copyright (c) 2005 phpBB Group
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7 | * @license http://opensource.org/licenses/gpl-license.php GNU Public License
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8 | *
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9 | */
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10 |
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11 | /**
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12 | * @ignore
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13 | */
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14 | if (!defined('IN_PHPBB'))
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15 | {
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16 | exit;
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17 | }
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18 |
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19 | include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
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20 |
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21 | /**
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22 | * MySQLi Database Abstraction Layer
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23 | * mysqli-extension has to be compiled with:
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24 | * MySQL 4.1+ or MySQL 5.0+
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25 | * @package dbal
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26 | */
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27 | class dbal_mysqli extends dbal
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28 | {
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29 | var $multi_insert = true;
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30 |
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31 | /**
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32 | * Connect to server
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33 | */
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34 | function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false , $new_link = false)
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35 | {
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36 | $this->persistency = $persistency;
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37 | $this->user = $sqluser;
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38 | $this->server = $sqlserver;
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39 | $this->dbname = $database;
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40 | $port = (!$port) ? NULL : $port;
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41 |
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42 | // Persistant connections not supported by the mysqli extension?
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43 | $this->db_connect_id = @mysqli_connect($this->server, $this->user, $sqlpassword, $this->dbname, $port);
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44 |
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45 | if ($this->db_connect_id && $this->dbname != '')
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46 | {
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47 | @mysqli_query($this->db_connect_id, "SET NAMES 'utf8'");
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48 |
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49 | // enforce strict mode on databases that support it
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50 | if (version_compare($this->sql_server_info(true), '5.0.2', '>='))
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51 | {
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52 | $result = @mysqli_query($this->db_connect_id, 'SELECT @@session.sql_mode AS sql_mode');
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53 | $row = @mysqli_fetch_assoc($result);
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54 | @mysqli_free_result($result);
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55 |
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56 | $modes = array_map('trim', explode(',', $row['sql_mode']));
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57 |
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58 | // TRADITIONAL includes STRICT_ALL_TABLES and STRICT_TRANS_TABLES
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59 | if (!in_array('TRADITIONAL', $modes))
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60 | {
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61 | if (!in_array('STRICT_ALL_TABLES', $modes))
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62 | {
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63 | $modes[] = 'STRICT_ALL_TABLES';
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64 | }
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65 |
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66 | if (!in_array('STRICT_TRANS_TABLES', $modes))
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67 | {
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68 | $modes[] = 'STRICT_TRANS_TABLES';
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69 | }
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70 | }
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71 |
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72 | $mode = implode(',', $modes);
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73 | @mysqli_query($this->db_connect_id, "SET SESSION sql_mode='{$mode}'");
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74 | }
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75 | return $this->db_connect_id;
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76 | }
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77 |
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78 | return $this->sql_error('');
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79 | }
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80 |
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81 | /**
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82 | * Version information about used database
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83 | * @param bool $raw if true, only return the fetched sql_server_version
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84 | * @return string sql server version
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85 | */
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86 | function sql_server_info($raw = false)
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87 | {
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88 | global $cache;
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89 |
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90 | if (empty($cache) || ($this->sql_server_version = $cache->get('mysqli_version')) === false)
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91 | {
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92 | $result = @mysqli_query($this->db_connect_id, 'SELECT VERSION() AS version');
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93 | $row = @mysqli_fetch_assoc($result);
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94 | @mysqli_free_result($result);
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95 |
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96 | $this->sql_server_version = $row['version'];
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97 |
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98 | if (!empty($cache))
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99 | {
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100 | $cache->put('mysqli_version', $this->sql_server_version);
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101 | }
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102 | }
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103 |
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104 | return ($raw) ? $this->sql_server_version : 'MySQL(i) ' . $this->sql_server_version;
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105 | }
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106 |
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107 | /**
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108 | * SQL Transaction
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109 | * @access private
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110 | */
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111 | function _sql_transaction($status = 'begin')
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112 | {
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113 | switch ($status)
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114 | {
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115 | case 'begin':
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116 | return @mysqli_autocommit($this->db_connect_id, false);
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117 | break;
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118 |
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119 | case 'commit':
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120 | $result = @mysqli_commit($this->db_connect_id);
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121 | @mysqli_autocommit($this->db_connect_id, true);
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122 | return $result;
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123 | break;
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124 |
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125 | case 'rollback':
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126 | $result = @mysqli_rollback($this->db_connect_id);
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127 | @mysqli_autocommit($this->db_connect_id, true);
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128 | return $result;
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129 | break;
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130 | }
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131 |
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132 | return true;
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133 | }
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134 |
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135 | /**
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136 | * Base query method
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137 | *
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138 | * @param string $query Contains the SQL query which shall be executed
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139 | * @param int $cache_ttl Either 0 to avoid caching or the time in seconds which the result shall be kept in cache
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140 | * @return mixed When casted to bool the returned value returns true on success and false on failure
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141 | *
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142 | * @access public
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143 | */
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144 | function sql_query($query = '', $cache_ttl = 0)
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145 | {
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146 | if ($query != '')
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147 | {
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148 | global $cache;
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149 |
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150 | // EXPLAIN only in extra debug mode
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151 | if (defined('DEBUG_EXTRA'))
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152 | {
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153 | $this->sql_report('start', $query);
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154 | }
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155 |
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156 | $this->query_result = ($cache_ttl && method_exists($cache, 'sql_load')) ? $cache->sql_load($query) : false;
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157 | $this->sql_add_num_queries($this->query_result);
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158 |
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159 | if ($this->query_result === false)
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160 | {
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161 | if (($this->query_result = @mysqli_query($this->db_connect_id, $query)) === false)
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162 | {
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163 | $this->sql_error($query);
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164 | }
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165 |
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166 | if (defined('DEBUG_EXTRA'))
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167 | {
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168 | $this->sql_report('stop', $query);
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169 | }
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170 |
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171 | if ($cache_ttl && method_exists($cache, 'sql_save'))
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172 | {
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173 | $cache->sql_save($query, $this->query_result, $cache_ttl);
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174 | }
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175 | }
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176 | else if (defined('DEBUG_EXTRA'))
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177 | {
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178 | $this->sql_report('fromcache', $query);
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179 | }
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180 | }
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181 | else
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182 | {
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183 | return false;
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184 | }
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185 |
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186 | return $this->query_result;
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187 | }
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188 |
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189 | /**
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190 | * Build LIMIT query
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191 | */
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192 | function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
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193 | {
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194 | $this->query_result = false;
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195 |
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196 | // if $total is set to 0 we do not want to limit the number of rows
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197 | if ($total == 0)
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198 | {
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199 | // MySQL 4.1+ no longer supports -1 in limit queries
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200 | $total = '18446744073709551615';
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201 | }
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202 |
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203 | $query .= "\n LIMIT " . ((!empty($offset)) ? $offset . ', ' . $total : $total);
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204 |
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205 | return $this->sql_query($query, $cache_ttl);
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206 | }
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207 |
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208 | /**
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209 | * Return number of affected rows
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210 | */
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211 | function sql_affectedrows()
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212 | {
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213 | return ($this->db_connect_id) ? @mysqli_affected_rows($this->db_connect_id) : false;
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214 | }
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215 |
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216 | /**
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217 | * Fetch current row
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218 | */
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219 | function sql_fetchrow($query_id = false)
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220 | {
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221 | global $cache;
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222 |
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223 | if ($query_id === false)
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224 | {
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225 | $query_id = $this->query_result;
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226 | }
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227 |
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228 | if (!is_object($query_id) && isset($cache->sql_rowset[$query_id]))
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229 | {
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230 | return $cache->sql_fetchrow($query_id);
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231 | }
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232 |
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233 | return ($query_id !== false) ? @mysqli_fetch_assoc($query_id) : false;
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234 | }
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235 |
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236 | /**
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237 | * Seek to given row number
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238 | * rownum is zero-based
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239 | */
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240 | function sql_rowseek($rownum, &$query_id)
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241 | {
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242 | global $cache;
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243 |
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244 | if ($query_id === false)
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245 | {
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246 | $query_id = $this->query_result;
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247 | }
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248 |
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249 | if (!is_object($query_id) && isset($cache->sql_rowset[$query_id]))
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250 | {
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251 | return $cache->sql_rowseek($rownum, $query_id);
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252 | }
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253 |
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254 | return ($query_id !== false) ? @mysqli_data_seek($query_id, $rownum) : false;
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255 | }
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256 |
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257 | /**
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258 | * Get last inserted id after insert statement
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259 | */
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260 | function sql_nextid()
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261 | {
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262 | return ($this->db_connect_id) ? @mysqli_insert_id($this->db_connect_id) : false;
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263 | }
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264 |
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265 | /**
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266 | * Free sql result
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267 | */
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268 | function sql_freeresult($query_id = false)
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269 | {
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270 | global $cache;
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271 |
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272 | if ($query_id === false)
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273 | {
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274 | $query_id = $this->query_result;
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275 | }
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276 |
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277 | if (!is_object($query_id) && isset($cache->sql_rowset[$query_id]))
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278 | {
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279 | return $cache->sql_freeresult($query_id);
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280 | }
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281 |
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282 | return @mysqli_free_result($query_id);
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283 | }
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284 |
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285 | /**
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286 | * Escape string used in sql query
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287 | */
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288 | function sql_escape($msg)
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289 | {
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290 | return @mysqli_real_escape_string($this->db_connect_id, $msg);
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291 | }
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292 |
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293 | /**
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294 | * Build LIKE expression
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295 | * @access private
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296 | */
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297 | function _sql_like_expression($expression)
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298 | {
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299 | return $expression;
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300 | }
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301 |
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302 | /**
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303 | * Build db-specific query data
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304 | * @access private
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305 | */
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306 | function _sql_custom_build($stage, $data)
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307 | {
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308 | switch ($stage)
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309 | {
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310 | case 'FROM':
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311 | $data = '(' . $data . ')';
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312 | break;
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313 | }
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314 |
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315 | return $data;
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316 | }
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317 |
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318 | /**
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319 | * return sql error array
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320 | * @access private
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321 | */
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322 | function _sql_error()
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323 | {
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324 | if (!$this->db_connect_id)
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325 | {
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326 | return array(
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327 | 'message' => @mysqli_connect_error(),
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328 | 'code' => @mysqli_connect_errno()
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329 | );
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330 | }
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331 |
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332 | return array(
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333 | 'message' => @mysqli_error($this->db_connect_id),
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334 | 'code' => @mysqli_errno($this->db_connect_id)
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335 | );
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336 | }
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337 |
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338 | /**
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339 | * Close sql connection
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340 | * @access private
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341 | */
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342 | function _sql_close()
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343 | {
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344 | return @mysqli_close($this->db_connect_id);
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345 | }
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346 |
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347 | /**
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348 | * Build db-specific report
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349 | * @access private
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350 | */
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351 | function _sql_report($mode, $query = '')
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352 | {
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353 | static $test_prof;
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354 |
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355 | // current detection method, might just switch to see the existance of INFORMATION_SCHEMA.PROFILING
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356 | if ($test_prof === null)
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357 | {
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358 | $test_prof = false;
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359 | if (strpos(mysqli_get_server_info($this->db_connect_id), 'community') !== false)
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360 | {
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361 | $ver = mysqli_get_server_version($this->db_connect_id);
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362 | if ($ver >= 50037 && $ver < 50100)
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363 | {
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364 | $test_prof = true;
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365 | }
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366 | }
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367 | }
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368 |
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369 | switch ($mode)
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370 | {
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371 | case 'start':
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372 |
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373 | $explain_query = $query;
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374 | if (preg_match('/UPDATE ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
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375 | {
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376 | $explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
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377 | }
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378 | else if (preg_match('/DELETE FROM ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
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379 | {
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380 | $explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
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381 | }
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382 |
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383 | if (preg_match('/^SELECT/', $explain_query))
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384 | {
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385 | $html_table = false;
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386 |
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387 | // begin profiling
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388 | if ($test_prof)
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389 | {
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390 | @mysqli_query($this->db_connect_id, 'SET profiling = 1;');
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391 | }
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392 |
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393 | if ($result = @mysqli_query($this->db_connect_id, "EXPLAIN $explain_query"))
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394 | {
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395 | while ($row = @mysqli_fetch_assoc($result))
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396 | {
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397 | $html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
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398 | }
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399 | }
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400 | @mysqli_free_result($result);
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401 |
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402 | if ($html_table)
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403 | {
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404 | $this->html_hold .= '</table>';
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405 | }
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406 |
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407 | if ($test_prof)
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408 | {
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409 | $html_table = false;
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410 |
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411 | // get the last profile
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412 | if ($result = @mysqli_query($this->db_connect_id, 'SHOW PROFILE ALL;'))
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413 | {
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414 | $this->html_hold .= '<br />';
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415 | while ($row = @mysqli_fetch_assoc($result))
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416 | {
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417 | // make <unknown> HTML safe
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418 | if (!empty($row['Source_function']))
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419 | {
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420 | $row['Source_function'] = str_replace(array('<', '>'), array('<', '>'), $row['Source_function']);
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421 | }
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422 |
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423 | // remove unsupported features
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424 | foreach ($row as $key => $val)
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425 | {
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426 | if ($val === null)
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427 | {
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428 | unset($row[$key]);
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429 | }
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430 | }
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431 | $html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
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432 | }
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433 | }
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434 | @mysqli_free_result($result);
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435 |
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436 | if ($html_table)
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437 | {
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438 | $this->html_hold .= '</table>';
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439 | }
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440 |
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441 | @mysqli_query($this->db_connect_id, 'SET profiling = 0;');
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442 | }
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443 | }
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444 |
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445 | break;
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446 |
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447 | case 'fromcache':
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448 | $endtime = explode(' ', microtime());
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449 | $endtime = $endtime[0] + $endtime[1];
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450 |
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451 | $result = @mysqli_query($this->db_connect_id, $query);
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452 | while ($void = @mysqli_fetch_assoc($result))
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453 | {
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454 | // Take the time spent on parsing rows into account
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455 | }
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456 | @mysqli_free_result($result);
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457 |
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458 | $splittime = explode(' ', microtime());
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459 | $splittime = $splittime[0] + $splittime[1];
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460 |
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461 | $this->sql_report('record_fromcache', $query, $endtime, $splittime);
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462 |
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463 | break;
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464 | }
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465 | }
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466 | }
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467 |
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468 | ?>
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