Изменение размера фотографии перед загрузкой с помощью Stack Overflow

В настоящее время я использую Valums-File-Uploader для загрузки файлов на мой сервер. Плагин использует javascript для загрузки изображений и использует php для их сохранения. Недостатком является то, что он не изменяет размер фотографий перед их загрузкой; поэтому требуется больше времени для загрузки и использования большего количества ресурсов. Я наткнулся на php-скрипт, который на самом деле изменяет размеры изображений, но я не знаю, как принять участие в изменении размера и применить его к исходному файлу Valums file_uploader.php. Так как мой опыт в php ограничен, я хотел бы знать, возможно ли использовать такой подход. Я перечислю оба файла для справки.

Примечание: рассматриваемый php-файл изменяет размеры изображений, а также создает эскизы. меняю функцию изменения размера.

Заранее спасибо.

Это Valums file_uploader.php

<?php
class qqUploadedFileXhr {
/**
* Save the file to the specified path
* @return boolean TRUE on success
*/
function save($path) {
$input = fopen("php://input", "r");
$temp = tmpfile();
$realSize = stream_copy_to_stream($input, $temp);
fclose($input);

if ($realSize != $this->getSize()){
return false;
}

$target = fopen($path, "w");
fseek($temp, 0, SEEK_SET);
stream_copy_to_stream($temp, $target);
fclose($target);

return true;
}
function getName() {
return $_GET['qqfile'];
}
function getSize() {
if (isset($_SERVER["CONTENT_LENGTH"])){
return (int)$_SERVER["CONTENT_LENGTH"];
} else {
//throw new Exception('Getting content length is not supported.');
return false;
}
}
}


class qqUploadedFileForm {

function save($path) {
if(!move_uploaded_file($_FILES['qqfile']['tmp_name'], $path)){
return false;
}
return true;
}
function getName() {
return $_FILES['qqfile']['name'];
}
function getSize() {
return $_FILES['qqfile']['size'];
}
}

class qqFileUploader {
var $allowedExtensions = array();
var $sizeLimit = 10485760;
var $file;

function __construct(array $allowedExtensions = array(), $sizeLimit =   s10485760){
$allowedExtensions = array_map("strtolower", $allowedExtensions);

$this->allowedExtensions = $allowedExtensions;
$this->sizeLimit = $sizeLimit;

//$this->checkServerSettings();

if (isset($_GET['qqfile'])) {
$this->file = new qqUploadedFileXhr();
} elseif (isset($_FILES['qqfile'])) {
$this->file = new qqUploadedFileForm();
} else {
$this->file = false;
}
}

function checkServerSettings(){
$postSize = $this->toBytes(ini_get('post_max_size'));
$uploadSize = $this->toBytes(ini_get('upload_max_filesize'));

if ($postSize < $this->sizeLimit || $uploadSize < $this->sizeLimit){
$size = max(1, $this->sizeLimit / 1024 / 1024) . 'M';
die("{'error':'increase post_max_size and upload_max_filesize to $size'}");
}
}

function toBytes($str){
$val = trim($str);
$last = strtolower($str[strlen($str)-1]);
switch($last) {
case 'g': $val *= 1024;
case 'm': $val *= 1024;
case 'k': $val *= 1024;
}
return $val;
}

/**
* Returns array('success'=>true, 'file'=>$filename) or array('error'=>'error message')
*/
function handleUpload($uploadDirectory, $replaceOldFile = FALSE){
if (!is_writable($uploadDirectory)){
return array('error' => "Server error. Upload directory isn't writable.");
}

if (!$this->file){
return array('error' => 'No files were uploaded.');
}

$size = $this->file->getSize();

if ($size == 0) {
return array('error' => 'File is empty');
}

if ($size > $this->sizeLimit) {
return array('error' => 'File is too large');
}

$pathinfo = pathinfo($this->file->getName());
$filename = strtolower($pathinfo['filename']);
//$filename = md5(uniqid());
$ext = strtolower($pathinfo['extension']);

if($this->allowedExtensions && !in_array(strtolower($ext), $this->allowedExtensions)){
$these = implode(', ', $this->allowedExtensions);
return array('error' => 'File has an invalid extension, it should be one of '. $these . '.');
}

if(!$replaceOldFile){
/// don't overwrite previous files that were uploaded
while (file_exists($uploadDirectory . $filename . '.' . $ext)) {
$filename .= rand(10, 99);
}
}
$filename = sanitize_file_name($filename);

if ($this->file->save($uploadDirectory . $filename . '.' . $ext)){
return array('success'=>true, 'file'=> $filename . '.' . $ext);
} else {
return array('error'=> 'Could not save uploaded file.' .
'The upload was cancelled, or server error encountered');
}

}
}

Я обнаружил, что это php-скрипт, который изменяет размеры изображений перед загрузкой.

<?php
$thumb_square_size      = 200; //Thumbnails will be cropped to 200x200      pixels
$max_image_size         = 1100; //Maximum image size (height and width)
$thumb_prefix           = "thumb_"; //Normal thumb Prefix
$destination_folder     = 'C:\server\htdocs\UPLOAD\drag\uploads'; //upload      directory ends with / (slash)
$jpeg_quality           = 90; //jpeg quality
/continue only if $_POST is set and it is a Ajax request
if(isset($_POST) && isset($_SERVER['HTTP_X_REQUESTED_WITH']) &&   strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest'){

// check $_FILES['ImageFile'] not empty
if(!isset($_FILES['image_file']) || !is_uploaded_file($_FILES['image_file']['tmp_name'])){
die('Image file is Missing!'); // output error when above checks fail.
}

//uploaded file info we need to proceed
$image_name = $_FILES['image_file']['name']; //file name
$image_size = $_FILES['image_file']['size']; //file size
$image_temp = $_FILES['image_file']['tmp_name']; //file temp

$image_size_info    = getimagesize($image_temp); //get image size

if($image_size_info){
$image_width        = $image_size_info[0]; //image width
$image_height       = $image_size_info[1]; //image height
$image_type         = $image_size_info['mime']; //image type
}else{
die("Make sure image file is valid!");
}

//switch statement below checks allowed image type
//as well as creates new image from given file
switch($image_type){
case 'image/png':
$image_res =  imagecreatefrompng($image_temp); break;
case 'image/gif':
$image_res =  imagecreatefromgif($image_temp); break;
case 'image/jpeg': case 'image/pjpeg':
$image_res = imagecreatefromjpeg($image_temp); break;
default:
$image_res = false;
}

if($image_res){
//Get file extension and name to construct new file name
$image_info = pathinfo($image_name);
$image_extension = strtolower($image_info["extension"]); //image extension
$image_name_only = strtolower($image_info["filename"]);//file name only, no extension

//create a random name for new image (Eg: fileName_293749.jpg) ;
$new_file_name = $image_name_only. '_' .  rand(0, 9999999999) . '.' . $image_extension;

//folder path to save resized images and thumbnails
$thumb_save_folder  = $destination_folder . $thumb_prefix . $new_file_name;
$image_save_folder  = $destination_folder . $new_file_name;

//call normal_resize_image() function to proportionally resize image
if(normal_resize_image($image_res, $image_save_folder, $image_type, $max_image_size, $image_width, $image_height, $jpeg_quality))
{
//call crop_image_square() function to create square thumbnails
if(!crop_image_square($image_res, $thumb_save_folder, $image_type, $thumb_square_size, $image_width, $image_height, $jpeg_quality))
{
die('Error Creating thumbnail');
}

/* We have succesfully resized and created thumbnail image
We can now output image to user's browser or store information in the database*/
echo '<div align="center">';
echo '<img src="uploads/'.$thumb_prefix . $new_file_name.'" alt="Thumbnail">';
echo '<br />';
echo '<img src="uploads/'. $new_file_name.'" alt="Resized Image">';
echo '</div>';
}

imagedestroy($image_res); //freeup memory
}
}

#####  This function will proportionally resize image #####
function normal_resize_image($source, $destination, $image_type, $max_size,  $image_width, $image_height, $quality){

if($image_width <= 0 || $image_height <= 0){return false;} //return false if  nothing to resize

//do not resize if image is smaller than max size
if($image_width <= $max_size && $image_height <= $max_size){
if(save_image($source, $destination, $image_type, $quality)){
return true;
}
}

//Construct a proportional size of new image
$image_scale    = min($max_size/$image_width, $max_size/$image_height);
$new_width      = ceil($image_scale * $image_width);
$new_height     = ceil($image_scale * $image_height);

$new_canvas     = imagecreatetruecolor( $new_width, $new_height ); //Create a new true color image

//Copy and resize part of an image with resampling
if(imagecopyresampled($new_canvas, $source, 0, 0, 0, 0, $new_width, $new_height, $image_width, $image_height)){
save_image($new_canvas, $destination, $image_type, $quality); //save resized image
}

return true;
}

##### This function corps image to create exact square, no matter what its  original size! ######
function crop_image_square($source, $destination, $image_type, $square_size,   $image_width, $image_height, $quality){
if($image_width <= 0 || $image_height <= 0){return false;} //return false if  nothing to resize

if( $image_width > $image_height )
{
$y_offset = 0;
$x_offset = ($image_width - $image_height) / 2;
$s_size     = $image_width - ($x_offset * 2);
}else{
$x_offset = 0;
$y_offset = ($image_height - $image_width) / 2;
$s_size = $image_height - ($y_offset * 2);
}
$new_canvas = imagecreatetruecolor( $square_size, $square_size); //Create a new true color image

//Copy and resize part of an image with resampling
if(imagecopyresampled($new_canvas, $source, 0, 0, $x_offset, $y_offset, $square_size, $square_size, $s_size, $s_size)){
save_image($new_canvas, $destination, $image_type, $quality);
}

return true;
}

##### Saves image resource to file #####
function save_image($source, $destination, $image_type, $quality){
switch(strtolower($image_type)){//determine mime type
case 'image/png':
imagepng($source, $destination); return true; //save png file
break;
case 'image/gif':
imagegif($source, $destination); return true; //save gif file
break;
case 'image/jpeg': case 'image/pjpeg':
imagejpeg($source, $destination, $quality); return true; //save jpeg file
break;
default: return false;
}
}

Это мой код MERGE, но безуспешно.

<?php
class qqUploadedFileXhr {
/**
* Save the file to the specified path
* @return boolean TRUE on success
*/
function save($path) {
$input = fopen("php://input", "r");
$temp = tmpfile();
$realSize = stream_copy_to_stream($input, $temp);
fclose($input);

if ($realSize != $this->getSize()){
return false;
}

$target = fopen($path, "w");
fseek($temp, 0, SEEK_SET);
stream_copy_to_stream($temp, $target);
fclose($target);

return true;
}
function getName() {
return $_GET['qqfile'];
}
function getSize() {
if (isset($_SERVER["CONTENT_LENGTH"])){
return (int)$_SERVER["CONTENT_LENGTH"];
} else {
//throw new Exception('Getting content length is not supported.');
return false;
}
}
}
if($image_res){
//Get file extension and name to construct new file name
$image_info = pathinfo($image_name);
$image_extension = strtolower($image_info["extension"]); //image extension
$image_name_only = strtolower($image_info["filename"]);//file name only, no extension

//create a random name for new image (Eg: fileName_293749.jpg) ;
$new_file_name = $image_name_only. '_' .  rand(0, 9999999999) . '.' . $image_extension;

//folder path to save resized images and thumbnails
$thumb_save_folder  = $destination_folder . $thumb_prefix . $new_file_name;
$image_save_folder  = $destination_folder . $new_file_name;

//call normal_resize_image() function to proportionally resize image
if(normal_resize_image($image_res, $image_save_folder, $image_type, $max_image_size, $image_width, $image_height, $jpeg_quality))
{
//call crop_image_square() function to create square thumbnails
if(!crop_image_square($image_res, $thumb_save_folder, $image_type, $thumb_square_size, $image_width, $image_height, $jpeg_quality))
{
die('Error Creating thumbnail');
}

/* We have succesfully resized and created thumbnail image
We can now output image to user's browser or store information in the database*/
echo '<div align="center">';
echo '<img src="uploads/'.$thumb_prefix . $new_file_name.'" alt="Thumbnail">';
echo '<br />';
echo '<img src="uploads/'. $new_file_name.'" alt="Resized Image">';
echo '</div>';
}

imagedestroy($image_res); //freeup memory
}
}

#####  This function will proportionally resize image #####
function normal_resize_image($source, $destination, $image_type, $max_size,  $image_width, $image_height, $quality){

if($image_width <= 0 || $image_height <= 0){return false;} //return false if  nothing to resize

//do not resize if image is smaller than max size
if($image_width <= $max_size && $image_height <= $max_size){
if(save_image($source, $destination, $image_type, $quality)){
return true;
}
}

//Construct a proportional size of new image
$image_scale    = min($max_size/$image_width, $max_size/$image_height);
$new_width      = ceil($image_scale * $image_width);
$new_height     = ceil($image_scale * $image_height);

$new_canvas     = imagecreatetruecolor( $new_width, $new_height ); //Create a new true color image

//Copy and resize part of an image with resampling
if(imagecopyresampled($new_canvas, $source, 0, 0, 0, 0, $new_width, $new_height, $image_width, $image_height)){
save_image($new_canvas, $destination, $image_type, $quality); //save resized image
}

return true;
}

class qqUploadedFileForm {

function save($path) {
if(!move_uploaded_file($_FILES['qqfile']['tmp_name'], $path)){
return false;
}
return true;
}
function getName() {
return $_FILES['qqfile']['name'];
}
function getSize() {
return $_FILES['qqfile']['size'];
}
}

class qqFileUploader {
var $allowedExtensions = array();
var $sizeLimit = 10485760;
var $file;

function __construct(array $allowedExtensions = array(), $sizeLimit =   s10485760){
$allowedExtensions = array_map("strtolower", $allowedExtensions);

$this->allowedExtensions = $allowedExtensions;
$this->sizeLimit = $sizeLimit;

//$this->checkServerSettings();

if (isset($_GET['qqfile'])) {
$this->file = new qqUploadedFileXhr();
} elseif (isset($_FILES['qqfile'])) {
$this->file = new qqUploadedFileForm();
} else {
$this->file = false;
}
}

function checkServerSettings(){
$postSize = $this->toBytes(ini_get('post_max_size'));
$uploadSize = $this->toBytes(ini_get('upload_max_filesize'));

if ($postSize < $this->sizeLimit || $uploadSize < $this->sizeLimit){
$size = max(1, $this->sizeLimit / 1024 / 1024) . 'M';
die("{'error':'increase post_max_size and upload_max_filesize to $size'}");
}
}

function toBytes($str){
$val = trim($str);
$last = strtolower($str[strlen($str)-1]);
switch($last) {
case 'g': $val *= 1024;
case 'm': $val *= 1024;
case 'k': $val *= 1024;
}
return $val;
}

/**
* Returns array('success'=>true, 'file'=>$filename) or array('error'=>'error message')
*/
function handleUpload($uploadDirectory, $replaceOldFile = FALSE){
if (!is_writable($uploadDirectory)){
return array('error' => "Server error. Upload directory isn't writable.");
}

if (!$this->file){
return array('error' => 'No files were uploaded.');
}

$size = $this->file->getSize();

if ($size == 0) {
return array('error' => 'File is empty');
}

if ($size > $this->sizeLimit) {
return array('error' => 'File is too large');
}

$pathinfo = pathinfo($this->file->getName());
$filename = strtolower($pathinfo['filename']);
//$filename = md5(uniqid());
$ext = strtolower($pathinfo['extension']);

if($this->allowedExtensions && !in_array(strtolower($ext), $this->allowedExtensions)){
$these = implode(', ', $this->allowedExtensions);
return array('error' => 'File has an invalid extension, it should be one of '. $these . '.');
}

if(!$replaceOldFile){
/// don't overwrite previous files that were uploaded
while (file_exists($uploadDirectory . $filename . '.' . $ext)) {
$filename .= rand(10, 99);
}
}
$filename = sanitize_file_name($filename);

if ($this->file->save($uploadDirectory . $filename . '.' . $ext)){
return array('success'=>true, 'file'=> $filename . '.' . $ext);
} else {
return array('error'=> 'Could not save uploaded file.' .
'The upload was cancelled, or server error encountered');
}

}
}