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我试图编辑此代码，以便不仅仅插入信息 - 而是检查数据库中是否已存在该文件，如果它插入了现在的值。如果它确实存在......它应该只更新信息，将“价值”金额添加到已有的金额中而不是替换它。但是这对我来说是非常新的，我迷失了，所以任何帮助，真的很感激！更新mysql并将值添加到现有值
<?php
define('JPATH_BASE',$_SERVER['DOCUMENT_ROOT']);
require_once($_SERVER['DOCUMENT_ROOT']."/b2/configuration.php");
require_once($_SERVER['DOCUMENT_ROOT']."/b2/libraries/joomla/factory.php");
require_once($_SERVER['DOCUMENT_ROOT']."/b2/libraries/joomla/base/object.php");
require_once($_SERVER['DOCUMENT_ROOT']."/b2/libraries/joomla/database/database.php");
require_once($_SERVER['DOCUMENT_ROOT']."/b2/libraries/joomla/database/database/mysql.php");
$config = new JConfig;
$options = array();
$options['host'] = $config->host;
$options['user'] = $config->user;
$options['password'] = $config->password;
$options['database'] = $config->db;
$options['prefix'] = $config->dbprefix;
$options['select'] = true;
$db = new JDatabaseMySQL($options);
//$user = JFactory::getUser();
$userId = 0;
//($user->id > 0) ? $user->id : 0;
$numbervote = $_REQUEST['w'];
$folder = $_REQUEST['w2'];
$name = $_REQUEST['w1'];
$date = date('Y-m-d H-i-s');
$sql = "INSERT INTO jos_image_ratetting (id,userid,datecreated,value,filename,folder,md5name) VALUES(NULL,'".$userId."','".$date."','".$numbervote."','".$name."','".$folder."',MD5('".$name."'))";
$db->setQuery($sql);
if($db->query()){
$msg = "Thanks for rate!";
}else{
$msg = mysql_error();
}
echo $msg;
//echo 'Hello';
?>