PHP multi-File Upload comprehension Summary

Source: Internet
Author: User

Add [] to the name of the input Tag FILE type of the html file to create an array in the html file. For example, the name is pictures, the multi-file reference name is pictures [], and the instance is as follows:

The Code is as follows: Copy code

<Form action = "upload. php" method = "post" enctype = "multipart/form-data">
<P>
<Input type = "file" name = "pictures []"/> <br/>
<Input type = "file" name = "pictures []"/> <br/>
<Input type = "file" name = "pictures []"/> <br/>
<Input type = "submit" value = "Upload"/>
</P>
</Form> // example in the manual.

Select a file and Click Upload

The Code is as follows: Copy code

<? Php
Print_r ($ _ FILES );
?>

View source files:

The Code is as follows: Copy code
Array
(
[Pictures] => Array
(
[Name] => Array
(
[0] => file1.txt
[1] => file2.txt
[2] => file3.txt
)
[Type] => Array
(
[0] => application/octet-stream
[1] => application/octet-stream
[2] => application/octet-stream
)
[Tmp_name] => Array
(
[0] => D: EasyPHPtmpphp47.tmp
[1] => D: EasyPHPtmpphp48.tmp
[2] => D: EasyPHPtmpphp49.tmp
)
[Error] => Array
(
[0] => 0
[1] => 0
[2] => 0
)
[Size] => Array
(
[0] = & gt; 94289
[1] => 65536.
[2] => 102400.
)
)
)

Assume the name is/file1.txt ?? And/file2.txt FILES are submitted, then the value of $ _ FILES ['pictures'] ['name'] [0] will be file1.txt, the value of $ _ FILES ['pictures'] ['name'] [1] is file2.txt. When _ files0000'file2.txt '] ['SIZE'] [0] will contain the size of the file file1.txt,

With the above information, it is easy to implement Multifile upload.

The Code is as follows: Copy code

<? Php

Class upload {
Public $ up_ext = array (), $ up_max = 5210, $ up_dir;
Private $ up_name, $ up_rename = true, $ up_num = 0, $ up_files = array (), $ up_ret = array ();

Function _ construct ($ name, $ ext = array (), $ rename = true ){
If (! Empty ($ name )){
$ This-> up_name = $ name;
! Empty ($ ext) & $ this-> up_ext = $ ext;
$ This-> up_rename = $ rename;
$ This-> up_dir = website_dirroot.
$ Globals ['cfg _ upload_path '];
$ This-> initupload ();
} Else {
Exit ('upload file domain name is empty, initialization failed! ');
}
}

Private function initupload (){
If (is_array ($ _ files [$ this-> up_name]) {
$ Up_arr = count ($ _ files [$ this-> up_name]);
$ Up_all = count ($ _ files [$ this-> up_name], 1 );
$ Up_cnt = ($ up_all-$ up_arr)/$ up_arr;
For ($ I = 0; $ I <$ up_cnt; $ I ++ ){
If ($ _ files [$ this-> up_name] ['error'] [$ I]! = 4 ){
$ This-> up_files [] = array (
'Tmp _ name' => $ _ files [$ this-> up_name] ['tmp _ name'] [$ I],
'Name' => $ _ files [$ this-> up_name] ['name'] [$ I],
'Type' = >$ _ files [$ this-> up_name] ['type'] [$ I],
'SIZE' = >$ _ files [$ this-> up_name] ['SIZE'] [$ I],
'Error' => $ _ files [$ this-> up_name] ['error'] [$ I]
);
}
}
$ This-> up_num = count ($ this-> up_files );
} Else {
If (isset ($ _ files [$ this-> up_name]) {
$ This-> up_files = array (
'Tmp _ name' => $ _ files [$ this-> up_name] ['tmp _ name'],
'Name' => $ _ files [$ this-> up_name] ['name'],
'Type' = >$ _ files [$ this-> up_name] ['type'],
'SIZE' = >$ _ files [$ this-> up_name] ['SIZE'],
'Error' => $ _ files [$ this-> up_name] ['error']
);
$ This-> up_num = 1;
} Else {
Exit ('the file for upload is not found! ');
}
}

$ This-> chkupload ();
}

Private function chkupload (){
If (empty ($ this-> up_ext )){
$ Up_mime = array ('image/wbmp ', 'image/bmp', 'image/gif', 'image/pjpeg ', 'image/x-png ');
Foreach ($ this-> up_files as $ up_file ){
$ Up_allw = false;
Foreach ($ up_mime as $ mime ){
If ($ up_file ['type'] = $ mime ){
$ Up_allw = true; break;
}
}
! $ Up_allw & exit ('upload not allowed '. $ up_file ['type'].' format file! ');

If ($ up_file ['SIZE']/1024> $ this-> up_max ){
Exit ('cannot upload files larger than'. $ this-> up_max. 'k! ');
}
}
} Else {
Foreach ($ this-> up_files as $ up_file ){
$ Up_ext = end (explode ('.', $ up_file ['name']);

$ Up_allw = false;
Foreach ($ this-> up_ext as $ ext ){
If ($ up_ext = $ ext ){
$ Up_allw = true; break;
}
}
! $ Up_allw & exit ('upload is not allowed. '. $ up_ext.' format file! ');

If ($ up_file ['SIZE']/1024> $ this-> up_max ){
Exit ('cannot upload files larger than'. $ this-> up_max. 'k! ');
}
}
}

$ This-> uploading ();
}

Private function uploading (){
If (io: dircreate ($ this-> up_dir )){
If (chmod ($ this-> up_dir, 0777 )){
If (! Empty ($ this-> up_files )){
Foreach ($ this-> up_files as $ up_file ){
If (is_uploaded_file ($ up_file ['tmp _ name']) {
$ File_name = $ up_file ['name'];
If ($ this-> up_rename ){
$ File_ext = end (explode ('.', $ file_name ));
$ File_rnd = substr (md5 (uniqid (), mt_rand (0, 26), 6 );
$ File_name = date ('ymdhis ').' _ '. $ file_rnd.'. '. $ file_ext;
}
$ File_name = $ this-> up_dir. '/'. $ file_name;

If (move_uploaded_file ($ up_file ['tmp _ name'], $ file_name )){
$ This-> up_ret [] = str_replace (website_dirroot, '', $ file_name );
} Else {
Exit ('file Upload Failed! ');
}
}
}
}
} Else {
Exit ('Write Permission not enabled! ');
}
} Else {
Exit ('upload Directory creation failed! ');
}
}

Public function getupload (){
Return empty ($ this-> up_ret )? False: $ this-> up_ret;
}

Function _ destruct (){}
}
?>

We can see a for ($ I = 0; $ I <$ up_cnt; $ I ++), which is used to traverse the instances mentioned above.


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