1 <?php |
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2 /*********************************************************************** |
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3 |
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4 Copyright (C) 2002-2005 Rickard Andersson (rickard@punbb.org) |
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5 |
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6 This file is part of PunBB. |
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7 |
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8 PunBB is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published |
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10 by the Free Software Foundation; either version 2 of the License, |
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11 or (at your option) any later version. |
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12 |
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13 PunBB is distributed in the hope that it will be useful, but |
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14 WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 GNU General Public License for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with this program; if not, write to the Free Software |
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20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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21 MA 02111-1307 USA |
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22 |
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23 ************************************************************************/ |
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24 |
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25 |
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26 // Make sure we have built in support for MySQL |
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27 if (!function_exists('mysql_connect')) |
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28 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.'); |
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29 |
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30 |
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31 class DBLayer |
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32 { |
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33 var $prefix; |
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34 var $link_id; |
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35 var $query_result; |
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36 |
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37 var $saved_queries = array(); |
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38 var $num_queries = 0; |
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39 |
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40 |
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41 function DBLayer($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect) |
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42 { |
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43 $this->prefix = $db_prefix; |
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44 |
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45 if ($p_connect) |
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46 $this->link_id = @mysql_pconnect($db_host, $db_username, $db_password); |
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47 else |
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48 $this->link_id = @mysql_connect($db_host, $db_username, $db_password); |
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49 |
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50 if ($this->link_id) |
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51 { |
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52 if (@mysql_select_db($db_name, $this->link_id)) |
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53 return $this->link_id; |
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54 else |
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55 error('Unable to select database. MySQL reported: '.mysql_error(), __FILE__, __LINE__); |
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56 } |
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57 else |
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58 error('Unable to connect to MySQL server. MySQL reported: '.mysql_error(), __FILE__, __LINE__); |
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59 } |
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60 |
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61 |
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62 function start_transaction() |
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63 { |
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64 return; |
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65 } |
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66 |
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67 |
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68 function end_transaction() |
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69 { |
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70 return; |
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71 } |
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72 |
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73 |
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74 function query($sql, $unbuffered = false) |
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75 { |
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76 if (defined('PUN_SHOW_QUERIES')) |
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77 $q_start = get_microtime(); |
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78 |
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79 if ($unbuffered) |
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80 $this->query_result = @mysql_unbuffered_query($sql, $this->link_id); |
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81 else |
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82 $this->query_result = @mysql_query($sql, $this->link_id); |
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83 |
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84 if ($this->query_result) |
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85 { |
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86 if (defined('PUN_SHOW_QUERIES')) |
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87 $this->saved_queries[] = array($sql, sprintf('%.5f', get_microtime() - $q_start)); |
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88 |
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89 ++$this->num_queries; |
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90 |
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91 return $this->query_result; |
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92 } |
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93 else |
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94 { |
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95 if (defined('PUN_SHOW_QUERIES')) |
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96 $this->saved_queries[] = array($sql, 0); |
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97 |
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98 return false; |
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99 } |
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100 } |
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101 |
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102 |
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103 function result($query_id = 0, $row = 0) |
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104 { |
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105 return ($query_id) ? @mysql_result($query_id, $row) : false; |
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106 } |
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107 |
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108 |
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109 function fetch_assoc($query_id = 0) |
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110 { |
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111 return ($query_id) ? @mysql_fetch_assoc($query_id) : false; |
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112 } |
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113 |
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114 |
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115 function fetch_row($query_id = 0) |
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116 { |
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117 return ($query_id) ? @mysql_fetch_row($query_id) : false; |
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118 } |
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119 |
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120 |
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121 function num_rows($query_id = 0) |
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122 { |
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123 return ($query_id) ? @mysql_num_rows($query_id) : false; |
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124 } |
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125 |
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126 |
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127 function affected_rows() |
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128 { |
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129 return ($this->link_id) ? @mysql_affected_rows($this->link_id) : false; |
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130 } |
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131 |
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132 |
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133 function insert_id() |
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134 { |
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135 return ($this->link_id) ? @mysql_insert_id($this->link_id) : false; |
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136 } |
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137 |
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138 |
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139 function get_num_queries() |
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140 { |
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141 return $this->num_queries; |
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142 } |
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143 |
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144 |
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145 function get_saved_queries() |
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146 { |
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147 return $this->saved_queries; |
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148 } |
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149 |
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150 |
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151 function free_result($query_id = false) |
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152 { |
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153 return ($query_id) ? @mysql_free_result($query_id) : false; |
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154 } |
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155 |
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156 |
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157 function escape($str) |
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158 { |
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159 if (is_array($str)) |
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160 return ''; |
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161 else if (function_exists('mysql_real_escape_string')) |
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162 return mysql_real_escape_string($str, $this->link_id); |
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163 else |
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164 return mysql_escape_string($str); |
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165 } |
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166 |
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167 |
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168 function error() |
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169 { |
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170 $result['error_sql'] = @current(@end($this->saved_queries)); |
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171 $result['error_no'] = @mysql_errno($this->link_id); |
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172 $result['error_msg'] = @mysql_error($this->link_id); |
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173 |
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174 return $result; |
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175 } |
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176 |
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177 |
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178 function close() |
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179 { |
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180 if ($this->link_id) |
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181 { |
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182 if ($this->query_result) |
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183 @mysql_free_result($this->query_result); |
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184 |
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185 return @mysql_close($this->link_id); |
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186 } |
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187 else |
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188 return false; |
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189 } |
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190 } |
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