php 使用预览OOP进行多个文件上载
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https://stackoverflow.com/questions/13683579/how-to-provide-a-preview-for-multiple-images-selected-in-fileuplaod-using-jquery
<?php
use PHP\File\Upload;
if (isset($_POST['upload'])) {
// define the path to the upload folder
$destination = 'uploads/';
require_once 'Upload.php';
try {
$loader = new Upload($destination);
$loader->uploadFile();
$result = $loader->getMessages();
} catch (Exception $e) {
echo $e->getMessage();
}
}
?>
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Upload File(s)</title>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<style type="text/css">
.preview-area img {
margin-right: 5px;
}
</style>
</head>
<body>
<?php
if (isset($result)) {
echo '<ul>';
foreach ($result as $message) {
echo "<li>$message</li>";
}
echo '</ul>';
}
?>
<form action="" method="post" enctype="multipart/form-data" id="uploadImage">
<p>
<label for="image">Upload image:</label>
<input type="file" name="image[]" id="filelogo" multiple>
</p>
<p>
<input type="submit" name="upload" id="upload" value="Upload">
</p>
<div class="preview-area"></div>
</form>
</body>
<script>
$("#filelogo").change(function() {
var fileList = this.files;
var anyWindow = window.URL || window.webkitURL;
for(var i = 0; i < fileList.length; i++) {
//get a blob to play with
var objectUrl = anyWindow.createObjectURL(fileList[i]);
// for the next line to work, you need something class="preview-area" in your html
$('.preview-area').append('<img height="200" src="' + objectUrl + '" />');
// get rid of the blob
window.URL.revokeObjectURL(fileList[i]);
}
});
</script>
</html>
=============== UPLOAD CLASS =============================
<?php
namespace PHP\File;
class Upload {
protected $uploaded = [];
protected $destination;
/*---- Size is in Bytes-----
Bytes | MegaBytes (MB)
-----------|----------------
50,000 0.05
100,000 0.1
500,000 0.5
1,000,000 1
10,000,000 10
50,000,000 50
---------------------------*/
protected $max = 1000000; // 1 MB Default
protected $messages = [];
protected $allowed = [
'image/gif',
'image/jpeg',
'image/pjpeg',
'image/png'
];
protected $typeCheckingOn = true;
protected $notTrusted = ['bin', 'cgi', 'exe', 'js', 'pl', 'php', 'py', 'sh'];
protected $newName;
protected $renameDuplicates = true;
/*===============================================================
CONSTRUCTOR
/*=============================================================*/
public function __construct($path) {
if (!is_dir($path) || !is_writable($path)) {
throw new \Exception("$path must be a valid, writable directory.");
}
$this->destination = $path;
}
/*===============================================================
UPLOAD
/*=============================================================*/
public function uploadFile( ) {
$uploaded = current($_FILES);
if (is_array($uploaded['name'])) {
foreach ($uploaded['name'] as $key => $value) {
$currentFile['name'] = $uploaded['name'][$key];
$currentFile['type'] = $uploaded['type'][$key];
$currentFile['tmp_name'] = $uploaded['tmp_name'][$key];
$currentFile['error'] = $uploaded['error'][$key];
$currentFile['size'] = $uploaded['size'][$key];
/* print each file info
echo '<pre>';
print_r($currentFile) ;
echo '</pre>';
echo '<br>' ;
*/
if ( $this->checkFile($currentFile) ) {
$this->moveFile($currentFile);
}
}
}
}
/*===============================================================
CHECK FILE
/*=============================================================*/
protected function checkFile($file) {
$accept = true;
if ($file['error'] != 0) {
$this->getFileErrorMessage($file);
// stop checking if no file submitted, ERROR = 4
if ($file['error'] == 4) {
return false;
} else {
$accept = false;
}
}
if (!$this->checkFileSize($file)) {
$accept = false;
}
if ($this->typeCheckingOn) {
if (!$this->checkType($file)) {
$accept = false;
}
}
if ($accept) {
$this->checkName($file);
}
return $accept;
}
/*===============================================================
MOVE FILE
/*=============================================================*/
protected function moveFile($file) {
// at this point $this->newName is not null
$filename = isset($this->newName) ? $this->newName : $file['name'];
$success = move_uploaded_file($file['tmp_name'], $this->destination . $filename);
if ($success) {
$result = $file['name'] . ' was uploaded successfully';
//
if (!is_null($this->newName)) {
$result .= ', and was renamed ' . $this->newName;
}
$this->messages[] = $result;
} else {
$this->messages[] = 'Could not upload ' . $file['name'];
}
}
/*===============================================================
CHECK NAME
/*=============================================================*/
protected function checkName($file) {
$this->newName = null;
$nospaces = str_replace(' ', '_', $file['name'] );
if ($nospaces != $file['name']) {
$this->newName = $nospaces;
}
$name = isset($this->newName) ? $this->newName : $file['name'];
$existing = scandir($this->destination);
// this file exists already, rename it
if (in_array($name, $existing)) {
$basename = pathinfo($name, PATHINFO_FILENAME);
$extension = pathinfo($name, PATHINFO_EXTENSION);
$i = 1;
do {
$this->newName = $basename . '_' . $i++;
if (!empty($extension)) {
$this->newName .= ".$extension";
}
} while (in_array($this->newName, $existing));
}
}
/*===============================================================
GET MESSAGES
/*=============================================================*/
public function getMessages() {
return $this->messages;
}
/*===============================================================
GET MAXSIZE
/*=============================================================*/
public function getMaxSize() {
return number_format($this->max/1024, 1) . ' KB';
}
/*===============================================================
GET ERROR MESSAGE
/*=============================================================*/
protected function getFileErrorMessage($file) {
switch($file['error']) {
case 1:
case 2:
$this->messages[] = $file['name'] . ' is too big: (max: ' .
$this->getMaxSize() . ').';
break;
case 3:
$this->messages[] = $file['name'] . ' was only partially uploaded.';
break;
case 4:
$this->messages[] = 'No file submitted.';
break;
default:
$this->messages[] = 'Sorry, there was a problem uploading ' . $file['name'];
break;
}
}
/*===============================================================
CHECK SIZE
/*=============================================================*/
protected function checkFileSize($file) {
if ($file['error'] == 1 || $file['error'] == 2) {
return false;
} elseif ($file['size'] == 0) {
$this->messages[] = $file['name'] . ' is an empty file.';
return false;
// this will execute for our max size that we specify in this
// class, overriding the system php.ini file size
} elseif ($file['size'] > $this->max) {
$this->messages[] = $file['name'] . ' exceeds the maximum size
for a file (' . $this->getMaxSize() . ').';
return false;
} else {
return true;
}
}
/*===============================================================
CHECK TYPE
/*=============================================================*/
protected function checkType($file) {
if (in_array( $file['type'], $this->allowed)) {
return true;
} else {
if (!empty($file['type'])) {
$this->messages[] = $file['name'] . ' is not permitted type of file.';
}
return false;
}
}
} // END CLASS以上是关于php 使用预览OOP进行多个文件上载的主要内容，如果未能解决你的问题，请参考以下文章