Created
June 28, 2009 11:26
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Early version of Eregansu’s DBCore
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<?php | |
/* Copyright 2009 Mo McRoberts. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions | |
* are met: | |
* | |
* 1. Redistributions of source code must retain the above copyright | |
* notice, this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright | |
* notice, this list of conditions and the following disclaimer in the | |
* documentation and/or other materials provided with the distribution. | |
* 3. The names of the author(s) of this software may not be used to endorse | |
* or promote products derived from this software without specific prior | |
* written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, | |
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY | |
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL | |
* AUTHORS OF THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED | |
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
*/ | |
class DBCore | |
{ | |
protected $rsClass; | |
public function vquery($query, $params) | |
{ | |
if(!is_array($params)) $params = array(); | |
$sql = preg_replace('/\?/e', "\$this->quote(array_shift(\$params))", $query); | |
return $this->execute($sql); | |
} | |
public function exec($query) | |
{ | |
$params = func_get_args(); | |
array_shift($params); | |
if($this->vquery($query, $params)) | |
{ | |
return true; | |
} | |
return false; | |
} | |
/* $rs = $inst->query('SELECT * FROM `sometable` WHERE `field` = ? AND `otherfield` = ?', $something, 27); */ | |
public function query($query) | |
{ | |
$params = func_get_args(); | |
array_shift($params); | |
if(($r = $this->vquery($query, $params))) | |
{ | |
return new $this->rsClass($this, $r); | |
} | |
return null; | |
} | |
public function getRow($query) | |
{ | |
$row = null; | |
$params = func_get_args(); | |
array_shift($params); | |
if(($r = $this->vquery($query, $params))) | |
{ | |
$rs = $this->rsClass($this, $r); | |
$row = $rs->next(); | |
$rs = null; | |
} | |
return $row; | |
} | |
protected function reportError($errmsg, $sqlString) | |
{ | |
ini_set('display_errors', 'On'); | |
trigger_error($errmsg . ' while executing ' . $sqlString, E_USER_ERROR); | |
} | |
public function insert($table, $kv) | |
{ | |
$keys = array_keys($kv); | |
$values = array_values($kv); | |
array_walk($keys, array($this, 'quoteObjectRef')); | |
array_walk($values, array($this, 'quoteRef')); | |
$sql = 'INSERT INTO ' . $this->quoteObject($table) . '(' . implode(',', $keys) . ') VALUES (' . implode(',', $values) . ')'; | |
return $this->execute($sql); | |
} | |
public function update($table, $kv, $clause) | |
{ | |
$sql = 'UPDATE ' . $this->quoteObject($table) . ' SET '; | |
foreach($kv as $key => $value) | |
{ | |
$sql .= $this->quoteObject($key) . ' = ' . $this->quote($value) . ', '; | |
} | |
$sql = substr($sql, 0, -2); | |
if(is_string($clause) && strlen($clause)) | |
{ | |
$sql .= ' WHERE ' . $clause; | |
} | |
else if(is_array($clause) && count($clause)) | |
{ | |
$sql .= ' WHERE '; | |
foreach($clause as $key => $value) | |
{ | |
$sql .= $this->quoteObject($key) . ' = ' . $this->quote($value) . ' AND '; | |
} | |
$sql = substr($sql, 0, -4); | |
} | |
return $this->execute($sql); | |
} | |
public function quoteObject($name) | |
{ | |
return '"' . $name . '"'; | |
} | |
public function quoteRef(&$value) | |
{ | |
$value = $this->quote($value); | |
} | |
public function quoteObjectRef(&$name) | |
{ | |
$name = $this->quoteObject($name); | |
} | |
} | |
/* while(($row = $rs->next())) { ... } */ | |
class DBDataSet | |
{ | |
public $fields = array(); | |
public $EOF = true; | |
public $db; | |
protected $resource; | |
public function __construct($db, $resource) | |
{ | |
$this->db = $db; | |
$this->resource = $resource; | |
$this->EOF = false; | |
} | |
public function next() | |
{ | |
if($this->EOF) return false; | |
if(!$this->getRow()) | |
{ | |
$this->EOF = true; | |
return null; | |
} | |
return $this->fields; | |
} | |
} | |
class MySQL extends DBCore | |
{ | |
protected $rsClass = 'MySQLSet'; | |
protected $mysql; | |
public function __construct($name = null, $host = null, $user = null, $pass = null) | |
{ | |
if(!($this->mysql = mysql_connect($host, $user, $pass))) | |
{ | |
$this->raiseError(null); | |
} | |
if(!mysql_select_db($name, $this->mysql)) | |
{ | |
$this->raiseError(null); | |
} | |
} | |
public function quoteObject($name) | |
{ | |
return '`' . $name . '`'; | |
} | |
protected function execute($sql) | |
{ | |
$r = mysql_query($sql, $this->mysql); | |
if($r === false) | |
{ | |
$this->raiseError($sql); | |
} | |
return $r; | |
} | |
protected function raiseError($query) | |
{ | |
return $this->reportError(mysql_error($this->mysql), $query); | |
} | |
public function quote($string) | |
{ | |
if(is_null($string)) | |
{ | |
return 'NULL'; | |
} | |
if(is_bool($string)) | |
{ | |
return ($string ? "'Y'" : '"N"'); | |
} | |
return "'" . mysql_real_escape_string($string, $this->mysql) . "'"; | |
} | |
public function getRow($query) | |
{ | |
$row = null; | |
$params = func_get_args(); | |
array_shift($params); | |
if(($r = $this->vquery($query . ' LIMIT 1', $params))) | |
{ | |
$row = mysql_fetch_assoc($r); | |
} | |
return $row; | |
} | |
public function insertId() | |
{ | |
return mysql_insert_id($this->mysql); | |
} | |
} | |
class MySQLSet extends DBDataSet | |
{ | |
protected function getRow() | |
{ | |
return ($this->fields = mysql_fetch_assoc($this->resource)); | |
} | |
} | |
global $DB; | |
$DB = new MySQL(DB_NAME, DB_HOST, DB_USER, DB_PASSWORD); |
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