在实现图像调整器脚本时遇到问题：
<?php
// Create image from file
switch(strtolower($_FILES['Filedata']['type']))
{
case 'image/jpeg':
$image = imagecreatefromjpeg($_FILES['Filedata']['tmp_name']);
break;
case 'image/png':
$image = imagecreatefrompng($_FILES['Filedata']['tmp_name']);
break;
case 'image/gif':
$image = imagecreatefromgif($_FILES['Filedata']['tmp_name']);
break;
}
// Target dimensions
$max_width = 240;
$max_height = 180;
// Get current dimensions
$old_width = imagesx($image);
$old_height = imagesy($image);
// Calculate the scaling we need to do to fit the image inside our frame
$scale = min($max_width/$old_width, $max_height/$old_height);
// Get the new dimensions
$new_width = ceil($scale*$old_width);
$new_height = ceil($scale*$old_height);
// Create new empty image
$new = imagecreatetruecolor($new_width, $new_height);
// Resize old image into new
imagecopyresampled($new, $image,
0, 0, 0, 0,
$new_width, $new_height, $old_width, $old_height);
// Catch the imagedata
ob_start();
imagejpeg($new, NULL, 90);
$data = ob_get_clean();
// Destroy resources
imagedestroy($image);
imagedestroy($new);
?>
到以下上传脚本：
<?php
/* *
* upload avatar
*/
function uploadavatar()
{
$app = JFactory::getApplication();
$db = JFactory::getDBO();
$user = JFactory::getUser();
// load language for component media
JPlugin::loadLanguage( 'com_media', JPATH_SITE );
JPlugin::loadLanguage( 'com_media', JPATH_ADMINISTRATOR );
$params = JComponentHelper::getParams('com_media');
require_once( JPATH_SITE.DS.'components'.DS.'com_media'.DS.'helpers'.DS.'media.php' );
define('COM_AUP_MEDIA_BASE_IMAGE', JPATH_ROOT.DS.'components'.DS.'com_alphauserpoints'.DS.'assets'.DS.'images');
// Check for request forgeries
JRequest::checkToken( 'request' ) or jexit( 'Invalid Token' );
$file = JRequest::getVar( 'Filedata', '', 'files', 'array' );
$folder = JRequest::getVar( 'folder', 'avatars', '', 'path' );
$format = JRequest::getVar( 'format', 'html', '', 'cmd');
$return = JRequest::getVar( 'return-url', null, 'post', 'base64' );
$referrerid = JRequest::getVar( 'referrerid', '', 'post', 'string' );
$err = null;
// Set FTP credentials, if given
jimport('joomla.client.helper');
JClientHelper::setCredentialsFromRequest('ftp');
// Make the filename safe
jimport('joomla.filesystem.file');
$file['name'] = JFile::makeSafe($file['name']);
if (isset($file['name']) && $referrerid!='') {
$extention = JFile::getExt($file['name']);
$newnameavatar = strtolower($referrerid.'.'.$extention);
//chmod (COM_AUP_MEDIA_BASE_IMAGE.DS.$folder, 0755) ;
$filepath = JPath::clean(COM_AUP_MEDIA_BASE_IMAGE.DS.$folder.DS.$newnameavatar);
// erase old avatar
if ( file_exists($filepath) ) @unlink( $filepath );
if (!MediaHelper::canUpload( $file, $err )) {
if ($format == 'json') {
jimport('joomla.error.log');
$log = JLog::getInstance('upload.error.php');
$log->addEntry(array('comment' => 'Invalid: '.$filepath.': '.$err));
header('HTTP/1.0 415 Unsupported Media Type');
jexit('Error. Unsupported Media Type!');
} else {
JError::raiseNotice(100, JText::_($err));
// REDIRECT
if ($return) {
$app->redirect(base64_decode($return));
}
return;
}
}
if (JFile::exists($filepath)) {
if ($format == 'json') {
jimport('joomla.error.log');
$log = JLog::getInstance('upload.error.php');
$log->addEntry(array('comment' => 'File already exists: '.$filepath));
header('HTTP/1.0 409 Conflict');
jexit('Error. File already exists');
} else {
JError::raiseNotice(100, JText::_('UPLOAD FAILED. FILE ALREADY EXISTS'));
// REDIRECT
if ($return) {
$app->redirect(base64_decode($return));
}
return;
}
}
if (!JFile::upload($file['tmp_name'], $filepath)) {
if ($format == 'json') {
jimport('joomla.error.log');
$log = JLog::getInstance('upload.error.php');
$log->addEntry(array('comment' => 'Cannot upload: '.$filepath));
header('HTTP/1.0 400 Bad Request');
jexit('ERROR. UNABLE TO UPLOAD FILE');
} else {
JError::raiseWarning(100, JText::_('ERROR. UNABLE TO UPLOAD FILE'));
// REDIRECT
if ($return) {
$app->redirect(base64_decode($return));
}
return;
}
} else {
// SAVE IN PROFIL USER ALPHAUSERPOINTS
$query = "UPDATE #__alpha_userpoints" .
"\n SET avatar='".$newnameavatar."'" .
"\n WHERE referreid='".$referrerid."' AND userid='" . $user->id . "'"
;
$db->setQuery( $query );
if (!$db->query())
{
JError::raiseError( 500, $db->getErrorMsg() );
return false;
}
require_once (JPATH_SITE.DS.'components'.DS.'com_alphauserpoints'.DS.'helper.php');
if ($format == 'json') {
jimport('joomla.error.log');
$log = JLog::getInstance();
$log->addEntry(array('comment' => $folder));
jexit('Upload complete');
// apply rule for upload avatar
AlphaUserPointsHelper::userpoints( 'sysplgaup_uploadavatar', '', 0, $referrerid );
} else {
$app->enqueueMessage(JText::_('UPLOAD COMPLETE'));
// apply rule for upload avatar
AlphaUserPointsHelper::userpoints( 'sysplgaup_uploadavatar', '', 0, $referrerid );
// REDIRECT
if ($return) {
$app->redirect(base64_decode($return));
}
return;
}
}
} else {
$app->redirect('index.php', 'Invalid Request', 'error');
}
}
}
?>
我试图用 $image 替换 $file 字符串，但没有运气。我认为问题可能在于：
$file = JRequest::getVar( 'Filedata', '', 'files', 'array' );
没有得到与此相同的数据：
$_FILES['Filedata']
这就是为什么我可能会遇到问题。但是转换脚本本身会自行工作并获取图像数据，调整大小并返回图像，问题在于用当前脚本实现它。
如果我确实替换了这个：
$file = $_FILES['Filedata']
有了这个：
$file = JRequest::getVar( 'Filedata', '', 'files', 'array' );
它会检索相同的图像数据吗？
我通常可以做很多这样的事情，虽然这需要我一段时间，但这个让我卡住了。我还没有达到我可以知道如何使它工作的水平，我必须通过反复试验和研究和示例来做到这一点，这很困难。
我尝试将以下内容放在检查伪造注释下并删除 $file = ...。然后将其余的 $file 字符串更改为 $newfile，但没有运气，它要么返回错误，要么忽略调整大小脚本，取决于我是否删除 $file =... 等
// Target dimensions
$max_width = 240;
$max_height = 180;
// Get current dimensions
$old_width = imagesx($file);
$old_height = imagesy($file);
// Calculate the scaling we need to do to fit the image inside our frame
$scale = min($max_width/$old_width, $max_height/$old_height);
// Get the new dimensions
$new_width = ceil($scale*$old_width);
$new_height = ceil($scale*$old_height);
// Create new empty image
$new = imagecreatetruecolor($new_width, $new_height);
// Resize old image into new
imagecopyresampled($new, file,
0, 0, 0, 0,
$new_width, $new_height, $old_width, $old_height);
// Catch the imagedata
ob_start();
imagejpeg($new, NULL, 90);
$filenew = ob_get_clean();
// Destroy resources
imagedestroy($file);
imagedestroy($new);