Skoch_Filter_File_Resize 有效。这是一个自定义过滤器：http ://eliteinformatiker.de/2011/09/02/thumbnails-upload-and-resize-images-with-zend_form_element_file/
<?php
// Skoch/Filter/File/Resize.php
/**
* Zend Framework addition by skoch
*
* @category Skoch
* @package Skoch_Filter
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
* @author Stefan Koch <cct@stefan-koch.name>
*/
/**
* @see Zend_Filter_Interface
*/
require_once 'Zend/Filter/Interface.php';
/**
* Resizes a given file and saves the created file
*
* @category Skoch
* @package Skoch_Filter
*/
class Skoch_Filter_File_Resize implements Zend_Filter_Interface
{
protected $_width = null;
protected $_height = null;
protected $_keepRatio = true;
protected $_keepSmaller = true;
protected $_directory = null;
protected $_adapter = 'Skoch_Filter_File_Resize_Adapter_Gd';
/**
* Create a new resize filter with the given options
*
* @param Zend_Config|array $options Some options. You may specify: width,
* height, keepRatio, keepSmaller (do not resize image if it is smaller than
* expected), directory (save thumbnail to another directory),
* adapter (the name or an instance of the desired adapter)
* @return Skoch_Filter_File_Resize An instance of this filter
*/
public function __construct($options = array())
{
if ($options instanceof Zend_Config) {
$options = $options->toArray();
} elseif (!is_array($options)) {
require_once 'Zend/Filter/Exception.php';
throw new Zend_Filter_Exception('Invalid options argument provided to filter');
}
if (!isset($options['width']) && !isset($options['height'])) {
require_once 'Zend/Filter/Exception.php';
throw new Zend_Filter_Exception('At least one of width or height must be defined');
}
if (isset($options['width'])) {
$this->_width = $options['width'];
}
if (isset($options['height'])) {
$this->_height = $options['height'];
}
if (isset($options['keepRatio'])) {
$this->_keepRatio = $options['keepRatio'];
}
if (isset($options['keepSmaller'])) {
$this->_keepSmaller = $options['keepSmaller'];
}
if (isset($options['directory'])) {
$this->_directory = $options['directory'];
}
if (isset($options['adapter'])) {
if ($options['adapter'] instanceof Skoch_Filter_File_Resize_Adapter_Abstract) {
$this->_adapter = $options['adapter'];
} else {
$name = $options['adapter'];
if (substr($name, 0, 33) != 'Skoch_Filter_File_Resize_Adapter_') {
$name = 'Skoch_Filter_File_Resize_Adapter_' . ucfirst(strtolower($name));
}
$this->_adapter = $name;
}
}
$this->_prepareAdapter();
}
/**
* Instantiate the adapter if it is not already an instance
*
* @return void
*/
protected function _prepareAdapter()
{
if ($this->_adapter instanceof Skoch_Filter_File_Resize_Adapter_Abstract) {
return;
} else {
$this->_adapter = new $this->_adapter();
}
}
/**
* Defined by Zend_Filter_Interface
*
* Resizes the file $value according to the defined settings
*
* @param string $value Full path of file to change
* @return string The filename which has been set, or false when there were errors
*/
public function filter($value)
{
if ($this->_directory) {
$target = $this->_directory . '/' . basename($value);
} else {
$target = $value;
}
return $this->_adapter->resize($this->_width, $this->_height,
$this->_keepRatio, $value, $target, $this->_keepSmaller);
}
}
<?php
// Skoch/Filter/File/Resize/Adapter/Abstract.php
/**
* Zend Framework addition by skoch
*
* @category Skoch
* @package Skoch_Filter
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
* @author Stefan Koch <cct@stefan-koch.name>
*/
/**
* Resizes a given file and saves the created file
*
* @category Skoch
* @package Skoch_Filter
*/
abstract class Skoch_Filter_File_Resize_Adapter_Abstract
{
abstract public function resize($width, $height, $keepRatio, $file, $target, $keepSmaller = true);
protected function _calculateWidth($oldWidth, $oldHeight, $width, $height)
{
// now we need the resize factor
// use the bigger one of both and apply them on both
$factor = max(($oldWidth/$width), ($oldHeight/$height));
return array($oldWidth/$factor, $oldHeight/$factor);
}
}
<?php
// Skoch/Filter/File/Resize/Adapter/Gd.php
/**
* Zend Framework addition by skoch
*
* @category Skoch
* @package Skoch_Filter
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
* @author Stefan Koch <cct@stefan-koch.name>
*/
require_once 'Skoch/Filter/File/Resize/Adapter/Abstract.php';
/**
* Resizes a given file with the gd adapter and saves the created file
*
* @category Skoch
* @package Skoch_Filter
*/
class Skoch_Filter_File_Resize_Adapter_Gd extends
Skoch_Filter_File_Resize_Adapter_Abstract
{
public function resize($width, $height, $keepRatio, $file, $target, $keepSmaller = true)
{
list($oldWidth, $oldHeight, $type) = getimagesize($file);
switch ($type) {
case IMAGETYPE_PNG:
$source = imagecreatefrompng($file);
break;
case IMAGETYPE_JPEG:
$source = imagecreatefromjpeg($file);
break;
case IMAGETYPE_GIF:
$source = imagecreatefromgif($file);
break;
}
if (!$keepSmaller || $oldWidth > $width || $oldHeight > $height) {
if ($keepRatio) {
list($width, $height) = $this->_calculateWidth($oldWidth, $oldHeight, $width, $height);
}
} else {
$width = $oldWidth;
$height = $oldHeight;
}
$thumb = imagecreatetruecolor($width, $height);
imagealphablending($thumb, false);
imagesavealpha($thumb, true);
imagecopyresampled($thumb, $source, 0, 0, 0, 0, $width, $height, $oldWidth, $oldHeight);
switch ($type) {
case IMAGETYPE_PNG:
imagepng($thumb, $target);
break;
case IMAGETYPE_JPEG:
imagejpeg($thumb, $target);
break;
case IMAGETYPE_GIF:
imagegif($thumb, $target);
break;
}
return $target;
}
}
$photo->addFilter(new Skoch_Filter_File_Resize(array(
'width' => 200,
'height' => 300,
'keepRatio' => true,
)));