Upload mudando a extensão dos arquivos

Depende do código cara.

Acha a função move_uploaded_file() e veja o que ela faz.

Olá Willian!

Não consegui descobrir não. Segue minha classe de Upload pra analise.

<?php

/*
* jQuery File Upload Plugin PHP Example 5.5
* https://github.com/blueimp/jQuery-File-Upload
*
* Copyright 2010, Sebastian Tschan
* https://blueimp.net
*
* Licensed under the MIT license:
* http://www.opensource.org/licenses/MIT
*/

class UploadHandler {

 private $options;

 function __construct($options = null) {
 $this->options = array(
 'script_url' => $this->get_full_url() . '/',
 'upload_dir' => dirname(__FILE__) . '/files/',
 'upload_url' => $this->get_full_url() . '/files/',
 'param_name' => 'files',
 // The php.ini settings upload_max_filesize and post_max_size
 // take precedence over the following max_file_size setting:
 'max_file_size' => null,
 'min_file_size' => 1,
 'accept_file_types' => '/.+$/i',
 'max_number_of_files' => null,
 // Set the following option to false to enable non-multipart uploads:
 'discard_aborted_uploads' => true,
 // Set to true to rotate images based on EXIF meta data, if available:
 'orient_image' => false,
 'image_versions' => array(
 // Uncomment the following version to restrict the size of
 // uploaded images. You can also add additional versions with
 // their own upload directories:
 'large' => array(
 'upload_dir' => dirname(__FILE__) . '/files/',
 'upload_url' => dirname($_SERVER['PHP_SELF']) . '/files/',
 'max_width' => 1920,
 'max_height' => 1200
 ),
 'thumbnail' => array(
 'upload_dir' => dirname(__FILE__) . '/thumb/',
 'upload_url' => $this->get_full_url() . '/thumb/',
 'width' => 80,
 'height' => 80
 )
 )
 );
 if ($options)
 $this->options = array_merge($this->options, $options);
 }

 function get_full_url() {
 return (isset($_SERVER['HTTPS']) ? 'https://' : 'http://') . (isset($_SERVER['REMOTE_USER']) ? $_SERVER['REMOTE_USER'] . '@' : '') . (isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : ($_SERVER['SERVER_NAME'] . (isset($_SERVER['HTTPS']) && $_SERVER['SERVER_PORT'] === 443 || $_SERVER['SERVER_PORT'] === 80 ? '' : ':' . $_SERVER['SERVER_PORT']))) . substr($_SERVER['SCRIPT_NAME'], 0, strrpos($_SERVER['SCRIPT_NAME'], '/'));
 }

 private function get_file_object($file_name) {
 $file_path = $this->options['upload_dir'] . $file_name;
 if (is_file($file_path) && $file_name[0] !== '.') {
 $file = new stdClass();
 $file->name = $file_name;
 $file->size = filesize($file_path);
 $file->url = $this->options['upload_url'] . rawurlencode($file->name);
 foreach ($this->options['image_versions'] as $version => $options) {
 if (is_file($options['upload_dir'] . $file_name))
 $file->{$version . '_url'} = $options['upload_url'] . rawurlencode($file->name);
 }
 $file->delete_url = $this->options['script_url'] . '?file=' . rawurlencode($file->name);
 $file->delete_type = 'DELETE';
 return $file;
 }
 return null;
 }

 private function get_file_objects() {
 return array_values(array_filter(array_map(array($this, 'get_file_object'), scandir($this->options['upload_dir']))));
 }

 private function create_scaled_image($file_name, $options) {
 $file_path = $this->options['upload_dir'] . $file_name;
 $new_file_path = $options['upload_dir'] . $file_name;
 list($img_width, $img_height) = @getimagesize($file_path);
 if (!$img_width || !$img_height)
 return false;
 $scale = max(
 $options['width'] / $img_width,
 $options['height'] / $img_height
 );
 if ($options['width']) {
 $new_width = $img_width * $scale;
 $new_x = ($new_width > $options['width']) ? $new_width - $options['width'] : 0;
 }
 elseif ($options['max_width']) {
 $new_x = 0;
 if ($scale < 1)
 $scale = 1;
 if ($img_width * $scale > $options['max_width'])
 $new_width = $options['max_width'];
 else
 $new_width = $img_width * $scale;
 }
 if ($options['height']) {
 $new_height = $img_height * $scale;
 $new_y = ($new_height > $options['height']) ? $new_height - $options['height'] : 0;
 }
 elseif ($options['max_height']) {
 $new_y = 0;
 if ($scale < 1)
 $scale = 1;
 if ($img_height * $scale > $options['max_height'])
 $new_height = $options['max_height'];
 else
 $new_height = $img_height * $scale;
 }

 if ($options['max_width'] || $options['max_height']) {
 $scale = min(
 $new_width / $img_width,
 $new_height / $img_height
 );
 $new_width = $img_width * $scale;
 $new_height = $img_height * $scale;
 }
 $new_img = @imagecreatetruecolor($new_width - $new_x, $new_height - $new_y);
 switch (strtolower(substr(strrchr($file_name, '.'), 1))) {
 case 'jpg':
 case 'jpeg':
 $src_img = @imagecreatefromjpeg($file_path);
 $write_image = 'imagejpeg';
 if ($options['quality'])
 $quality = $options['quality'];
 else
 $quality = 75;
 break;
 case 'gif':
 @imagecolortransparent($new_img, @imagecolorallocate($new_img, 0, 0, 0));
 $src_img = @imagecreatefromgif($file_path);
 $write_image = 'imagegif';
 break;
 case 'png':
 @imagecolortransparent($new_img, @imagecolorallocate($new_img, 0, 0, 0));
 @imagealphablending($new_img, false);
 @imagesavealpha($new_img, true);
 $src_img = @imagecreatefrompng($file_path);
 $write_image = 'imagepng';
 break;
 default:
 $src_img = $image_method = null;
 }
 $success = $src_img && @imagecopyresampled(
 $new_img,
 $src_img,
 0 - $new_x / 2,
 0 - $new_y / 2,
 0, 0,
 $new_width,
 $new_height,
 $img_width,
 $img_height
 );
 if ($options['logo']) {
 $logo_img = @imagecreatefrompng($options['logo']);
 $success = $success && @imagecopy(
 $new_img,
 $logo_img,
 5,
 $height - $logo_height - 5,
 0, 0,
 imagesx($logo_img),
 imagesy($logo_img)
 );
 }
 $success = $success && $write_image($new_img, $new_file_path, $quality);
 if ($options['logo'])
 @imagedestroy($logo_img);
 @imagedestroy($src_img);
 @imagedestroy($new_img);
 return $success;
 }

 private function has_error($uploaded_file, $file, $error) {
 if ($error)
 return $error;
 if (!preg_match($this->options['accept_file_types'], $file->name))
 return 'acceptFileTypes';
 if ($uploaded_file && is_uploaded_file($uploaded_file))
 $file_size = filesize($uploaded_file);
 else
 $file_size = $_SERVER['CONTENT_LENGTH'];
 if ($this->options['max_file_size'] && ($file_size > $this->options['max_file_size'] || $file->size > $this->options['max_file_size']))
 return 'maxFileSize';
 if ($this->options['min_file_size'] && $file_size < $this->options['min_file_size'])
 return 'minFileSize';
 if (is_int($this->options['max_number_of_files']) && (count($this->get_file_objects()) >= $this->options['max_number_of_files']))
 return 'maxNumberOfFiles';
 return $error;
 }

 private function trim_file_name($name, $type) {
 // Remove path information and dots around the filename, to prevent uploading
 // into different directories or replacing hidden system files.
 // Also remove control characters and spaces (\x00..\x20) around the filename:
 $file_name = trim(basename(stripslashes($name)), ".\x00..\x20");
 $mime_types = array(
 'txt' => 'text/plain',
 'html' => 'text/html',
 'css' => 'text/css',
 'js' => 'application/javascript',
 'json' => 'application/json',
 'xml' => 'application/xml',
 'swf' => 'application/x-shockwave-flash',
 'flv' => 'video/x-flv',
 'png' => 'image/png',
 'jpg' => 'image/jpeg',
 'gif' => 'image/gif',
 'bmp' => 'image/bmp',
 'ico' => 'image/vnd.microsoft.icon',
 'tif' => 'image/tiff',
 'svg' => 'image/svg+xml',
 'zip' => 'application/zip',
 'rar' => 'application/x-rar',
 'exe' => 'application/x-msdownload',
 'msi' => 'application/x-msdownload',
 'cab' => 'application/vnd.ms-cab-compressed',
 'mp3' => 'audio/mpeg',
 'mov' => 'video/quicktime',
 'pdf' => 'application/pdf',
 'psd' => 'image/vnd.adobe.photoshop',
 'eps' => 'application/postscript',
 'ps' => 'application/postscript',
 'doc' => 'application/msword',
 'rtf' => 'application/rtf',
 'xls' => 'application/vnd.ms-excel',
 'ppt' => 'application/vnd.ms-powerpoint',
 'odt' => 'application/vnd.oasis.opendocument.text',
 'ods' => 'application/vnd.oasis.opendocument.spreadsheet'
 );
 // Add missing file extension for known image types:
 if (strpos($file_name, '.') === false) {
 if (in_array($type, $mime_types)) {
 $array = array_keys($mime_types, $type);
 $extension = $array[0];
 }
 elseif (preg_match('/^[a-z]+\/([a-z]+)/', $type, $matches))
 $extension = $matches[1];
 if (isset($extension))
 $file_name .= '.' . $extension;
 }
 return $file_name;
 }

 private function orient_image($file_path) {
 $exif = exif_read_data($file_path);
 $orientation = intval(@$exif['Orientation']);
 if (!in_array($orientation, array(3, 6, 8)))
 return false;
 $image = @imagecreatefromjpeg($file_path);
 switch ($orientation) {
 case 3:
 $image = @imagerotate($image, 180, 0);
 break;
 case 6:
 $image = @imagerotate($image, 270, 0);
 break;
 case 8:
 $image = @imagerotate($image, 90, 0);
 break;
 default:
 return false;
 }
 $success = imagejpeg($image, $file_path);
 @imagedestroy($image);
 return $success;
 }

 private function handle_file_upload($uploaded_file, $name, $size, $type, $error) {
 $file = new stdClass();
 $file->name = $this->trim_file_name($name, $type);
 $file->size = intval($size);
 $file->type = $type;
 $error = $this->has_error($uploaded_file, $file, $error);
 if (!$error && $file->name) {
 $file_path = $this->options['upload_dir'] . $file->name;
 $append_file = !$this->options['discard_aborted_uploads'] && is_file($file_path) && $file->size > filesize($file_path);
 clearstatcache();
 if ($uploaded_file && is_uploaded_file($uploaded_file)) {
 if ($append_file)
 file_put_contents($file_path, fopen($uploaded_file, 'r'), FILE_APPEND);
 else {
 if (!file_exists($this->options['upload_dir']))
 mkdir($this->options['upload_dir'], 0777, true);
 move_uploaded_file($uploaded_file, $file_path);
 }
 }
 else
 file_put_contents($file_path, fopen('php://input', 'r'), $append_file ? FILE_APPEND : 0);
 $file_size = filesize($file_path);
 if ($file_size === $file->size) {
 if ($this->options['orient_image'])
 $this->orient_image($file_path);
 $file->url = $this->options['upload_url'] . rawurlencode($file->name);
 foreach ($this->options['image_versions'] as $version => $options) {
 if (!file_exists($options['upload_dir']))
 mkdir($options['upload_dir'], 0777, true);
 if ($this->create_scaled_image($file->name, $options))
 $file->{$version . '_url'} = $options['upload_url'] . rawurlencode($file->name);
 }
 }
 else if ($this->options['discard_aborted_uploads']) {
 unlink($file_path);
 $file->error = 'abort';
 }
 $file->size = $file_size;
 $file->delete_url = $this->options['script_url'] . '?file=' . rawurlencode($file->name);
 $file->delete_type = 'DELETE';
 }
 else
 $file->error = $error;
 return $file;
 }

 public function get() {
 $file_name = isset($_REQUEST['file']) ? basename(stripslashes($_REQUEST['file'])) : null;
 if ($file_name)
 $info = $this->get_file_object($file_name);
 else
 $info = $this->get_file_objects();
 header('Content-type: application/json');
 echo json_encode($info);
 }

 public function post() {
 if (isset($_REQUEST['_method']) && $_REQUEST['_method'] === 'DELETE')
 return $this->delete();
 $upload = isset($_FILES[$this->options['param_name']]) ? $_FILES[$this->options['param_name']] : null;
 $info = array();
 if ($upload && is_array($upload['tmp_name'])) {
 foreach ($upload['tmp_name'] as $index => $value) {
 $info[] = $this->handle_file_upload(
 $upload['tmp_name'][$index],
 md5(uniqid(time())),
 isset($_SERVER['HTTP_X_FILE_SIZE']) ? $_SERVER['HTTP_X_FILE_SIZE'] : $upload['size'][$index],
 isset($_SERVER['HTTP_X_FILE_TYPE']) ? $_SERVER['HTTP_X_FILE_TYPE'] : $upload['type'][$index],
 $upload['error'][$index]
 );
 }
 }
 elseif ($upload || isset($_SERVER['HTTP_X_FILE_NAME'])) {
 $info[] = $this->handle_file_upload(
 isset($upload['tmp_name']) ? $upload['tmp_name'] : null,
 isset($_SERVER['HTTP_X_FILE_NAME']) ? md5(uniqid(time())) : (isset($upload['name']) ? md5(uniqid(time())) : null),
 isset($_SERVER['HTTP_X_FILE_SIZE']) ? $_SERVER['HTTP_X_FILE_SIZE'] : (isset($upload['size']) ? isset($upload['size']) : null),
 isset($_SERVER['HTTP_X_FILE_TYPE']) ? $_SERVER['HTTP_X_FILE_TYPE'] : (isset($upload['type']) ? isset($upload['type']) : null),
 isset($upload['error']) ? $upload['error'] : null
 );
 }
 header('Vary: Accept');
 $json = json_encode($info);
 $redirect = isset($_REQUEST['redirect']) ? stripslashes($_REQUEST['redirect']) : null;
 if ($redirect) {
 header('Location: ' . sprintf($redirect, rawurlencode($json)));
 return;
 }
 if (isset($_SERVER['HTTP_ACCEPT']) && (strpos($_SERVER['HTTP_ACCEPT'], 'application/json') !== false))
 header('Content-type: application/json');
 else
 header('Content-type: text/plain');
 echo $json;
 return $info;
 }

 public function delete() {
 $file_name = isset($_REQUEST['file']) ? basename(stripslashes($_REQUEST['file'])) : null;
 $file_path = $this->options['upload_dir'] . $file_name;
 $success = is_file($file_path) && $file_name[0] !== '.' && unlink($file_path);
 if ($success) {
 foreach ($this->options['image_versions'] as $version => $options) {
 $file = $options['upload_dir'] . $file_name;
 if (is_file($file))
 unlink($file);
 }
 }
 header('Content-type: application/json');
 echo json_encode($success);
 return $success;
 }

}

move_uploaded_file($uploaded_file, $file_path);ok? é nessa linha em que o arquivo é escrito. Deste método:

handle_file_upload($uploaded_file, $name, $size, $type, $error) {E o método que tem essa função, é chamado aqui:

 foreach ($upload['tmp_name'] as $index => $value) {
 $info[] = $this->handle_file_upload(
 $upload['tmp_name'][$index],
 md5(uniqid(time())),
 isset($_SERVER['HTTP_X_FILE_SIZE']) ? $_SERVER['HTTP_X_FILE_SIZE'] : $upload['size'][$index],
 isset($_SERVER['HTTP_X_FILE_TYPE']) ? $_SERVER['HTTP_X_FILE_TYPE'] : $upload['type'][$index],
 $upload['error'][$index]
 );
 }Então por enquanto o valor de **$name** é: **md5(uniqid(time()))**Essa variavel $name sofre uma transformação aqui:

 

$file->name = $this->trim_file_name($name, $type);Vamos olhar a função **trim_file_name** então:

 $mime_types = array(
 'txt' => 'text/plain',
 'html' => 'text/html',
 'css' => 'text/css',
 'js' => 'application/javascript',
 'json' => 'application/json',
 'xml' => 'application/xml',
 'swf' => 'application/x-shockwave-flash',
 'flv' => 'video/x-flv',
 'png' => 'image/png',
 'jpg' => 'image/jpeg',
 'gif' => 'image/gif',
 'bmp' => 'image/bmp',
 'ico' => 'image/vnd.microsoft.icon',
 'tif' => 'image/tiff',
 'svg' => 'image/svg+xml',
 'zip' => 'application/zip',
 'rar' => 'application/x-rar',
 'exe' => 'application/x-msdownload',
 'msi' => 'application/x-msdownload',
 'cab' => 'application/vnd.ms-cab-compressed',
 'mp3' => 'audio/mpeg',
 'mov' => 'video/quicktime',
 'pdf' => 'application/pdf',
 'psd' => 'image/vnd.adobe.photoshop',
 'eps' => 'application/postscript',
 'ps' => 'application/postscript',
 'doc' => 'application/msword',
 'rtf' => 'application/rtf',
 'xls' => 'application/vnd.ms-excel',
 'ppt' => 'application/vnd.ms-powerpoint',
 'odt' => 'application/vnd.oasis.opendocument.text',
 'ods' => 'application/vnd.oasis.opendocument.spreadsheet'
 );ela possui esse array "de -> para" (dicionário de dados) para tentar descobrir a extensão ideal apartir do mimetype do arquivo. 

No caso, você informou que quando envia um arquivo .zip a extensão gravada é vnd?

tem certeza? não existe vnd como opção desse dicionário.

Debugue a função trim_file_name, pois como ela que é a responsável pela "transformação" da variável $name, se há algum bug, está nela.

Lembrando que o valor do parâmetro $type vem deste ternário:

isset($_SERVER['HTTP_X_FILE_TYPE']) ? $_SERVER['HTTP_X_FILE_TYPE'] : $upload['type'][$index]Que diz: se existir um cabeçalho HTTP_X_FILE_TYPE, use ele, se não, use o 'type' do array com index do foreach().