Simple DAO class based on PHP and MySQL

Source: Internet
Author: User
Simpledao.class
  1. Require_once (' firephpcore/firephp.class.php ');
  2. $firephp = Firephp::getinstance (true); Debugger in Firefox
  3. Class Simpledao {
  4. Private $_table = null;
  5. private static $_con = null;
  6. Public Function Simpledao () {
  7. if ($this->_con = = null) {
  8. $this->_con = @mysql_connect ("localhost", "root", "123456");
  9. if ($this->_con = = FALSE) {
  10. Echo ("Connect to DB Server failed.");
  11. $this->_con = null;
  12. Return
  13. }
  14. $firephp->log ("New DAO object");
  15. @mysql_select_db ("Swan", $this->_con);
  16. }
  17. }
  18. Public function table ($tablename) {
  19. $this->_table = $tablename;
  20. return $this;
  21. }
  22. Public Function Query ($sql) {
  23. $result = @mysql_query ($sql);
  24. $ret = [];
  25. if ($result) {
  26. while ($row = Mysql_fetch_array ($result)) {
  27. $ret [] = $row;
  28. }
  29. }
  30. return $ret;
  31. }
  32. Public function Get ($where = null) {
  33. $sql = "SELECT * from". $this->_table;
  34. $sql = $sql. $this->_getwherestring ($where);
  35. echo "[Get]". $sql. "
    ";
  36. return $this->query ($sql);
  37. }
  38. Public Function Insert ($params) {
  39. if ($params = = NULL | |!is_array ($params)) {
  40. return-1;
  41. }
  42. $keys = $this->_getparamkeystring ($params);
  43. $vals = $this->_getparamvalstring ($params);
  44. $sql = "INSERT into". $this->_table. " (". $keys.") VALUES (". $vals.") ";
  45. echo "[insert]". $sql. "
    ";
  46. $result = @mysql_query ($sql);
  47. if (! $result) {
  48. return-1;
  49. }
  50. return @mysql_insert_id ();
  51. }
  52. Public Function Update ($params, $where = null) {
  53. if ($params = = NULL | |!is_array ($params)) {
  54. return-1;
  55. }
  56. $upvals = $this->_getupdatestring ($params);
  57. $wheres = $this->_getwherestring ($where);
  58. $sql = "Update". $this->_table. "Set". $upvals. " ". $wheres;
  59. echo "[UPDATE]". $sql. "
    ";
  60. $result = @mysql_query ($sql);
  61. if (! $result) {
  62. return-1;
  63. }
  64. return @mysql_affected_rows ();
  65. }
  66. Public Function Delete ($where) {
  67. $wheres = $this->_getwherestring ($where);
  68. $sql = "Delete from". $this->_table. $wheres;
  69. echo "[delete]". $sql. "
    ";
  70. $result = @mysql_query ($sql);
  71. if (! $result) {
  72. return-1;
  73. }
  74. return @mysql_affected_rows ();
  75. }
  76. protected function _getparamkeystring ($params) {
  77. $keys = Array_keys ($params);
  78. Return implode (",", $keys);
  79. }
  80. protected function _getparamvalstring ($params) {
  81. $vals = Array_values ($params);
  82. Return "'". Implode ("', '", $vals). "'";
  83. }
  84. Private Function _getupdatestring ($params) {
  85. echo "_getupdatestring";
  86. $sql = "";
  87. if (Is_array ($params)) {
  88. $sql = $this->_getkeyvalstring ($params, ",");
  89. }
  90. return $sql;
  91. }
  92. Private Function _getwherestring ($params) {
  93. echo "_getwherestring";
  94. $sql = "";
  95. if (Is_array ($params)) {
  96. $sql = "where";
  97. $where = $this->_getkeyvalstring ($params, "and");
  98. $sql = $sql. $where;
  99. }
  100. return $sql;
  101. }
  102. Private Function _getkeyvalstring ($params, $split) {
  103. $str = "";
  104. if (Is_array ($params)) {
  105. $PARAMARR = Array ();
  106. foreach ($params as $key = = $val) {
  107. $valstr = $val;
  108. if (is_string ($val)) {
  109. $valstr = "'". $val. "'";
  110. }
  111. $PARAMARR [] = $key. " = ". $valstr;
  112. }
  113. $str = $str. Implode ($split, $PARAMARR);
  114. }
  115. return $str;
  116. }
  117. Public Function release () {
  118. @mysql_close ();
  119. }
  120. }
  121. function T ($table) {
  122. Return (new Simpledao ())->table ($table);
  123. }
  124. ?>
Copy CodeCode snippet that uses Simpledao
  1. Include "test/simpledao.php";
  2. $dao = T ("Sw_post");
  3. $result = $dao->get ();//get all Posts
  4. $dao->release ();
  5. echo Json_encode ($result);
  6. ?>
  7. Include "test/simpledao.php";
  8. $dao = T ("Sw_post");
  9. Update title where id=1
  10. $cnt = $dao->update (Array ("title" = "Hello REST2"), Array ("id" =>1));
  11. $dao->release ();
  12. echo Json_encode (Array ("count" = $cnt));
  13. ?>
  14. Include "test/simpledao.php";
  15. $dao = T ("Sw_tag");
  16. Insert new record
  17. $cnt = $dao->insert (Array ("PostID" =>4, "name" = "Test Tag"));
  18. $dao->release ();
  19. echo Json_encode (Array ("count" = $cnt));
  20. ?>
  21. Include "test/simpledao.php";
  22. $dao = T ("Sw_tag");
  23. Delete from table where name= ' Test tag '
  24. $cnt = $dao->delete (Array ("name" = "Test Tag"));
  25. $dao->release ();
  26. echo Json_encode (Array ("count" = $cnt));
  27. ?>
Copy Code
PHP, MySQL, DAO
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