Vladzur's Blog » MySQL http://vladzur.sangrederosas.cl Sobre PHP, Ubuntu, CakePHP y otras cosas Mon, 26 Jul 2010 19:06:54 +0000 es hourly 1 http://wordpress.org/?v=3.0 PHP: Clase para conectar MySQL http://vladzur.sangrederosas.cl/2009/09/09/php-clase-para-conectar-mysql/ http://vladzur.sangrederosas.cl/2009/09/09/php-clase-para-conectar-mysql/#comments Wed, 09 Sep 2009 17:04:03 +0000 admin http://vladzur.wordpress.com/2009/09/09/php-clase-para-conectar-mysql/ Siempre que necesitamos conectar una base de datos MySQL con PHP, debemos escribir unas cuantas instrucciones una y otra vez, para evitar esto, lo mejor es usar una clase que maneje nuestra conexión.
El siguiente, es el código de una clase que nos puede ayudar:

  2. <?php
  3. /*
  4. * database.php
  5. *
  6. * Copyright 2008 Vladimir Zurita <<a href="mailto:vladzur@gmail.com">vladzur@gmail.com</a>>
  7. *
  8. * This program is free software; you can redistribute it and/or modify
  9. * it under the terms of the GNU General Public License as published by
  10. * the Free Software Foundation; either version 2 of the License, or
  11. * (at your option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program; if not, write to the Free Software
  20. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  21. * MA 02110-1301, USA.
  22. */
  23.  
  24. /********************************************************
  25. * DataBase
  26. * Author: Vladimir Zurita
  27. *
  28. * This class makes easier to insert data into a table and connect
  29. * a database on MySQL
  30. * *******************************************************/
  31.  
  32. class DataBase {
  33.  
  34. var $db=array('host'=>'localhost',
  35. 'user'=>'your_user',
  36. 'pass'=>'your_password',
  37. 'dbase'=>'your_database'
  38. );
  39.  
  40. var $link="";
  41.  
  42. function connect(){
  43.  
  44. $this->link=mysql_connect($this->db['host'], $this->db['user'], $this->db['pass']);
  45. mysql_select_db($this->db['dbase'], $this->link);
  46.  
  47. }
  48.  
  49. function close(){
  50. mysql_close($this->link);
  51. }
  52.  
  53. function query($ssql=null){
  54.  
  55. $this->connect();
  56. if($result=mysql_query($ssql)){
  57. while($row=mysql_fetch_assoc($result)){
  58. $output[]=$row;
  59. }
  60. $this->close();
  61. return $output;
  62. }
  63. return false;
  64. }
  65.  
  66. function save($tabla,$data){
  67. $campos=array_keys($data);
  68. $desc=$this->describe_tabla($tabla);
  69. foreach($campos as $campo){
  70. for($i=0;$i<count($desc);$i++){
  71. if($campo==$desc[$i]['Field'])$tipo=$desc[$i]['Type'];
  72. }
  73. if(stristr($tipo,"varchar"))$value.="'".$data[$campo]."', ";
  74. if(stristr($tipo,"text"))$value.="'".$data[$campo]."', ";
  75. if(stristr($tipo,"int"))$value.=$data[$campo].", ";
  76. if(stristr($tipo,"blob"))$value.="'".$data[$campo]."', ";
  77. $field.=$campo.", ";
  78. }
  79. $field=trim($field,", ");
  80. $value=trim($value,", ");
  81. $sql="INSERT INTO ".$tabla." (".$field.") VALUES (".$value.")";
  82. //echo $sql;
  83. $this->connect();
  84. if($result=mysql_query($sql))return true;
  85. $this->close();
  86. return false;
  87. }
  88.  
  89. function update($tabla,$data,$condicion){
  90. $campos=array_keys($data);
  91. $desc=$this->describe_tabla($tabla);
  92. foreach($campos as $campo){
  93. for($i=0;$i<count($desc);$i++){
  94. if($campo==$desc[$i]['Field'])$tipo=$desc[$i]['Type'];
  95. }
  96. if(stristr($tipo,"varchar"))$value.=$campo."='".$data[$campo]."', ";
  97. if(stristr($tipo,"text"))$value.=$campo."='".$data[$campo]."', ";
  98. if(stristr($tipo,"int"))$value.=$campo."=".$data[$campo].", ";
  99. if(stristr($tipo,"blob"))$value.=$campo."='".$data[$campo]."', ";
  100.  
  101. }
  102.  
  103. $value=trim($value,", ");
  104. $sql="UPDATE ".$tabla." SET ".$value." WHERE ".$condicion;
  105. //echo $sql;
  106. $this->connect();
  107. if($result=mysql_query($sql)){
  108. $this->close();
  109. return true;
  110. }
  111. $this->close();
  112. return false;
  113. }
  114.  
  115. function delete($tabla, $condicion){
  116. $sql="DELETE ".$tabla." WHERE ".$condicion;
  117. $this->connect();
  118. if($result=mysql_query($sql)){
  119. $this->close();
  120. return true;
  121. }
  122. $this->close();
  123. return false;
  124. }
  125.  
  126. function describe_tabla($tabla){
  127. $sql="DESCRIBE ".$tabla;
  128. $this->connect();
  129. $res=mysql_query($sql);
  130. while($field=mysql_fetch_assoc($res)){
  131. $output[]=array('Field'=>$field['Field'], 'Type'=>$field['Type']);
  132. }
  133. $this->close();
  134. return $output;
  135. }
  136.  
  137. }
  138. ?>

El modo de uso es simple, veamos un ejemplo:

  2. <html>
  3. <head>
  4. <title>sin título</title>
  5. <meta http-equiv="content-type" content="text/html;charset=utf-8" />
  6. <meta name="generator" content="Geany 0.14" />
  7. </head>
  8. <body>
  9. <form method="post" action="example.php">
  10. <fieldset>
  11. <input type="text" name="data[name]">
  12. <input type="text" name="data[last_name]">
  13. <input type="text" name="data[email]">
  14. <input type="text" name="data[address]">
  15. <button type="submit">Save</button>
  16. </fieldset>
  17. </form>
  18. </body>
  19. </html>

Y recogemos el formulario con:

  2. <?php
  3. include("database.php");
  4. $DB= new DataBase();
  5. if(isset($_POST['data'])){
  6. $data=$_POST['data'];
  7. $DB->save('user',$data);
  8. exit();
  9. }
  10. ?>

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