PHP image and file batch upload code

Whether it is file or image batch upload, the first thing we do is to make an array variable like name=userfile[] in html, in php During acceptance, we do for ($_i=0; $_i<$_cont; $_i++) traversal so that we can upload files in batches. Let me look at an example below

Example

代码如下

session_start();
?>

PHP文件批量上传

<script><br> $(document).ready(function() {<br> $('#cont').val($('.file #file').size());<br> $('#send').eq(0).click(function() {<br> var filesize=$('.file #file').size();<br> $('.file').append("<input type='file' name='userfile[]' id='file'/>");<br> $('#cont').val(filesize+1);<br> });<br> });<br> </script>

PHP文件批量上传

if ($_GET['up']==up) {
//防止重复提交
if ($_SESSION['file']==$_GET['irand']) {
$_cont=intval($_POST['cont']);   //将file框总数接收并转换成整型
$_size=20000;                    //设置限制文件大小
$_dir='pdir/';                   //文件保存目录
function size($_size) {
//判断文件大小是否大于1024bit 如果大于，则将大小取值为KB，以此类推
if ($_size>1024*1024) {
return round($_size/1024/1024,2).' MB';
}else if ($_size>1024) {
$_size=$_size/1024;
return ceil($_size).'KB';
}else {
return $_size.' bit';
}
}
//设置上传图片的类型,设置图片上传大小
$_upfiles = array('image/jpeg','image/pjpeg','image/png','image/x-png','image/gif');
//利用for循环上传文件
for ($_i=0; $_i<$_cont; $_i++) {
if (is_array($_upfiles)) {
if (!in_array($_FILES['userfile']['type'][$_i],$_upfiles)) {
exit('Please upload files in the format: jpg, png, gif
Return');
}
}
//Judge file size
if ($_FILES['userfile']['size'][$_i]>$_size) {
exit('Uploaded files cannot exceed:'.size($_size));
}
//Check whether the file has been uploaded
if ($_FILES['userfile']['error'][$_i]>0) {
switch ($_FILES['userfile']['error'][1]) {
case 1: echo 'The uploaded file exceeds the limit of the upload_max_filesize option in php.ini';
break;
case 2: echo 'The size of the uploaded file exceeds the value specified by the MAX_FILE_SIZE option in the HTML form';
break;
case 3: echo 'Only part of the file was uploaded';
break;
case 4: echo 'No files uploaded';
break;
case 6: echo 'Temp folder not found';
break;
case 7: echo 'File writing failed';
break;
}
exit;
}
//Get file extension
if (!is_dir($_dir)) {
mkdir($_dir,0700);
}
//Generate number of essays
$_rand=mt_rand(0,100000);
//Get file extension
$_n=explode('.',$_FILES['userfile']['name'][$_i]); //Split the file name
$_file_len=count($_n); //Return the array length
//Make sure the extension obtained is the last one. The following
$_name=$_dir.time().'_'.$_rand.'.'.$_n[$_file_len-1];
//Move the file to the specified directory
if (is_uploaded_file($_FILES['userfile']['tmp_name'][$_i])) {
if (!@move_uploaded_file($_FILES['userfile']['tmp_name'][$_i],$_name)) {
exit('File move failed');
}else {
echo 'File uploaded successfully
';
echo 'File path:'.$_name.'
';
echo 'File size:'.size(filesize($_name));
echo '
Return to continue uploading';
}
}else {
exit('The uploaded temporary file does not exist and the file cannot be moved to the specified folder');
}
}
//Destroy session variables, there are several methods
//The first one, destroy all session variables: session_destroy();
//Second type: Destroy a single item such as: $_SESSION['file']=''
session_destroy();
exit;

}else {
exit('You have already submitted and cannot submit again
Return');
}
}
?>

　　核心原理分析

　　在多文件上传中我们前台最重要的是

代码如下

代码如下

　　这几行代码有细节的朋友会发现name="userfile[]"了，这个是以数组存储了，这样我们如果使用js也可以这样增加就可以了，那么在php是如何获取的呢

　　在多文件上传中php处理是一个关键

代码如下

for ($_i=0; $_i<$_cont; $_i++) {
if (is_uploaded_file($_FILES['userfile']['tmp_name'][$_i])) {
if (!@move_uploaded_file($_FILES['userfile']['tmp_name'][$_i],$_name)) {
exit('文件移动失败');
}else {
echo '文件上传成功
';
echo '文件路径：'.$_name.'
';
echo '文件大小：'.size(filesize($_name));
echo '
返回继续上传';
}
}

代码如下
for ($_i=0; $_i<$_cont; $_i++) { if (is_uploaded_file($_FILES['userfile']['tmp_name'][$_i])) { if (!@move_uploaded_file($_FILES['userfile']['tmp_name'][$_i],$_name)) { exit('文件移动失败'); }else { echo '文件上传成功 '; echo '文件路径：'.$_name.' '; echo '文件大小：'.size(filesize($_name)); echo ' 返回继续上传'; } }

　　这里显示很简单我们会看到有一个for，for就是遍历数组，遍历userfile[]数组，然后再由$_FILES['userfile']['tmp_name'][$_i]来获取不同文件图片再进行上传即可，注意[$_i]就是你的多文件上传项了，只是保存在了数组中。

Related labels：

php upload code picture us batch document yes First still

source：php.cn

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PHP image and file batch upload code_PHP tutorial

PHP image and file batch upload code

PHP文件批量上传