/modules/shop/includes/classes/cache.php

https://github.com/severnaya99/Sg-2010 · PHP · 206 lines · 176 code · 8 blank · 22 comment · 20 complexity · 2176a13c8f41b2b2c2f75ae01723b3a2 MD5 · raw file 

    

  1. <?php

    2. 

  2. //

    3. 

  3. // +----------------------------------------------------------------------+

    4. 

  4. // |zen-cart Open Source E-commerce                                       |

    5. 

  5. // +----------------------------------------------------------------------+

    6. 

  6. // | Copyright (c) 2003 The zen-cart developers                           |

    7. 

  7. // |                                                                      |   

    8. 

  8. // | http://www.zen-cart.com/index.php                                    |   

    9. 

  9. // |                                                                      |   

    10. 

  10. // | Portions Copyright (c) 2003 osCommerce                               |

    11. 

  11. // +----------------------------------------------------------------------+

    12. 

  12. // | This source file is subject to version 2.0 of the GPL license,       |

    13. 

  13. // | that is bundled with this package in the file LICENSE, and is        |

    14. 

  14. // | available through the world-wide-web at the following url:           |

    15. 

  15. // | http://www.zen-cart.com/license/2_0.txt.                             |

    16. 

  16. // | If you did not receive a copy of the zen-cart license and are unable |

    17. 

  17. // | to obtain it through the world-wide-web, please send a note to       |

    18. 

  18. // | license@zen-cart.com so we can mail you a copy immediately.          |

    19. 

  19. // +----------------------------------------------------------------------+

    20. 

  20. // $Id: cache.php 801 2004-12-13 23:50:33Z wilt $

    21. 

  21. //

    22. 

  22. 

    23. 

  23. class cache {

    24. 

  24. 

    25. 

  25.   function sql_cache_exists($zf_query) {

    26. 

  26.     global $db;

    27. 

  27.     $zp_cache_name = $this->cache_generate_cache_name($zf_query);

    28. 

  28.     switch (SQL_CACHE_METHOD) {

    29. 

  29.       case 'file':

    30. 

  30.         // where using a single directory at the moment. Need to look at splitting into subdirectories

    31. 

  31. 	// like adodb

    32. 

  32. 	if (file_exists(DIR_FS_SQL_CACHE . '/' . $zp_cache_name . '.sql')) {

    33. 

  33. 	  return true;

    34. 

  34. 	} else {

    35. 

  35.           return false;

    36. 

  36. 	}

    37. 

  37.       break;

    38. 

  38.       case 'database':

    39. 

  39.         $sql = "select * from " . TABLE_DB_CACHE . " where cache_entry_name = '" . $zp_cache_name . "'";

    40. 

  40. 	$zp_cache_exists = $db->Execute($sql);

    41. 

  41. 	if ($zp_cache_exists->RecordCount() > 0) {

    42. 

  42. 	  return true;

    43. 

  43. 	} else {

    44. 

  44.           return false;

    45. 

  45. 	}

    46. 

  46.       break;

    47. 

  47.       case 'memory':

    48. 

  48.         return false;

    49. 

  49.       break;

    50. 

  50.       case 'none':

    51. 

  51.         return false;

    52. 

  52.       break;

    53. 

  53.     }

    54. 

  54.   }

    55. 

  55. 

    56. 

  56.   function sql_cache_is_expired($zf_query, $zf_cachetime) {

    57. 

  57.     global $db;

    58. 

  58.     $zp_cache_name = $this->cache_generate_cache_name($zf_query);

    59. 

  59.     switch (SQL_CACHE_METHOD) {

    60. 

  60.       case 'file':

    61. 

  61.         if (filemtime(DIR_FS_SQL_CACHE . '/' . $zp_cache_name . '.sql') > (time() - $zf_cachetime)) {

    62. 

  62. 	  return false;

    63. 

  63. 	} else {

    64. 

  64.           return true;

    65. 

  65. 	}

    66. 

  66.       break;

    67. 

  67.       case 'database':

    68. 

  68.         $sql = "select * from " . TABLE_DB_CACHE . " where cache_entry_name = '" . $zp_cache_name ."'";

    69. 

  69. 	$cache_result = $db->Execute($sql);

    70. 

  70. 	if ($cache_result->RecordCount() > 0) {

    71. 

  71. 	  $start_time = $cache_result->fields['cache_entry_created'];

    72. 

  72. 	  if (time() - $start_time > $zf_cachetime) return true;

    73. 

  73. 	  return false;

    74. 

  74. 	} else {

    75. 

  75.           return true;

    76. 

  76. 	}

    77. 

  77.       break;

    78. 

  78.       case 'memory':

    79. 

  79.         return true;

    80. 

  80.       break;

    81. 

  81.       case 'none':

    82. 

  82.         return true;

    83. 

  83.       break;

    84. 

  84.     }

    85. 

  85.   }

    86. 

  86. 

    87. 

  87.   function sql_cache_expire_now($zf_query) {

    88. 

  88.     global $db;

    89. 

  89.     $zp_cache_name = $this->cache_generate_cache_name($zf_query);

    90. 

  90.     switch (SQL_CACHE_METHOD) {

    91. 

  91.       case 'file':

    92. 

  92.         @unlink(DIR_FS_SQL_CACHE . '/' . $zp_cache_name . '.sql');

    93. 

  93.         return true;

    94. 

  94.       break;

    95. 

  95.       case 'database':

    96. 

  96.         $sql = "delete from " . TABLE_DB_CACHE . " where cache_entry_name = '" . $zp_cache_name . "'";

    97. 

  97. 	$db->Execute($sql);

    98. 

  98.         return true;

    99. 

  99.       break;

    100. 

  100.       case 'memory':

    101. 

  101.         unset($this->cache_array[$zp_cache_name]);

    102. 

  102.         return true;

    103. 

  103.       break;

    104. 

  104.       case 'none':

    105. 

  105.         return true;

    106. 

  106.       break;

    107. 

  107.     }

    108. 

  108.   }

    109. 

  109.   

    110. 

  110.   function sql_cache_store($zf_query, $zf_result_array) {

    111. 

  111.     global $db;

    112. 

  112.     $zp_cache_name = $this->cache_generate_cache_name($zf_query);

    113. 

  113.     switch (SQL_CACHE_METHOD) {

    114. 

  114.       case 'file':

    115. 

  115.         $OUTPUT = serialize($zf_result_array); 

    116. 

  116.         $fp = fopen(DIR_FS_SQL_CACHE . '/' . $zp_cache_name . '.sql',"w"); 

    117. 

  117.         fputs($fp, $OUTPUT); 

    118. 

  118.         fclose($fp);

    119. 

  119.         return true;

    120. 

  120.       break;

    121. 

  121.       case 'database':

    122. 

  122.         $result_serialize = $db->prepare_input(serialize($zf_result_array));

    123. 

  123. 	$sql = "insert into " . TABLE_DB_CACHE . " set cache_entry_name = '" . $zp_cache_name . "', 

    124. 

  124. 	                                               cache_data = '" . $result_serialize . "',

    125. 

  125. 						       cache_entry_created = '" . time() . "'";

    126. 

  126. 	$db->Execute($sql);

    127. 

  127.         return true;

    128. 

  128.       break;

    129. 

  129.       case 'memory':

    130. 

  130.         return true;

    131. 

  131.       break;

    132. 

  132.       case 'none':

    133. 

  133.         return true;

    134. 

  134.       break;

    135. 

  135.     }

    136. 

  136.   }

    137. 

  137.   

    138. 

  138.   function sql_cache_read($zf_query) {

    139. 

  139.     global $db;

    140. 

  140.     $zp_cache_name = $this->cache_generate_cache_name($zf_query);

    141. 

  141.     switch (SQL_CACHE_METHOD) {

    142. 

  142.       case 'file':

    143. 

  143.         $zp_fa = file(DIR_FS_SQL_CACHE . '/' . $zp_cache_name . '.sql');

    144. 

  144. 	$zp_result_array = unserialize(implode('', $zp_fa));

    145. 

  145.         return $zp_result_array;

    146. 

  146.       break;

    147. 

  147.       case 'database':

    148. 

  148. 	$sql = "select * from " . TABLE_DB_CACHE . " where cache_entry_name = '" . $zp_cache_name . "'";

    149. 

  149. 	$zp_cache_result = $db->Execute($sql);

    150. 

  150. 	$zp_result_array = unserialize($zp_cache_result->fields['cache_data']); 

    151. 

  151.         return $zp_result_array;

    152. 

  152.       break;

    153. 

  153.       case 'memory':

    154. 

  154.         return true;

    155. 

  155.       break;

    156. 

  156.       case 'none':

    157. 

  157.         return true;

    158. 

  158.       break;

    159. 

  159.     }

    160. 

  160.   }

    161. 

  161.   

    162. 

  162.   function sql_cache_flush_cache() {

    163. 

  163.     global $db;

    164. 

  164.     switch (SQL_CACHE_METHOD) {

    165. 

  165.       case 'file':

    166. 

  166.         if ($za_dir = @dir(DIR_FS_SQL_CACHE)) {

    167. 

  167.           while ($zv_file = $za_dir->read()) {

    168. 

  168.             if (strstr($zv_file, '.sql') && strstr($zv_file, 'zc_')) {

    169. 

  169.               @unlink(DIR_FS_SQL_CACHE . '/' . $zv_file);

    170. 

  170.             }

    171. 

  171.           }

    172. 

  172.         }

    173. 

  173.         return true;

    174. 

  174.       break;

    175. 

  175.       case 'database':

    176. 

  176.         $sql = "delete from " . TABLE_DB_CACHE;

    177. 

  177. 	$db->Execute($sql);

    178. 

  178.         return true;

    179. 

  179.       break;

    180. 

  180.       case 'memory':

    181. 

  181.         return true;

    182. 

  182.       break;

    183. 

  183.       case 'none':

    184. 

  184.         return true;

    185. 

  185.       break;

    186. 

  186.     }

    187. 

  187.   }

    188. 

  188.   

    189. 

  189.   function cache_generate_cache_name($zf_query) {

    190. 

  190.     switch (SQL_CACHE_METHOD) {

    191. 

  191.       case 'file':

    192. 

  192.         return 'zc_' . md5($zf_query);

    193. 

  193.       break;

    194. 

  194.       case 'database':

    195. 

  195.         return 'zc_' . md5($zf_query);

    196. 

  196.       break;

    197. 

  197.       case 'memory':

    198. 

  198.         return 'zc_' . md5($zf_query);

    199. 

  199.       break;

    200. 

  200.       case 'none':

    201. 

  201.         return true;

    202. 

  202.       break;

    203. 

  203.     }

    204. 

  204.   }

    205. 

  205. }

    206. 

  206. ?>
    207.