PHP multi-file upload implementation-PHP Tutorial-php.cn

PHP multi-file upload implementation

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Release： 2016-07-25 08:44:23

Original

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As long as the file upload tag in the form is named in the form of an array, multiple files can be uploaded simultaneously.

Let’s look at an example:
-------------------------------------------------- -------------------

Upload file:

Upload file:

Upload file: < ;/td>

Upload file:
function upload($file_error, $file_tmp_name, $file_name){
$info = "";
if($file_name == "")
return $info;
switch($file_error){
case UPLOAD_ERR_INI_SIZE:
$info = $file_name. ": The file size exceeds the server limit";
break;
case UPLOAD_ERR_FORM_SIZE:
$info = $file_name. ": The file size exceeds the browser limit";
break;
case UPLOAD_ERR_PARTIAL:
$info = $file_name. ": Only part of the file was uploaded";
break;
case UPLOAD_ERR_NO_FILE:
$info = $file_name. ": None File uploaded";
break;
case UPLOAD_ERR_NO_TMP_DIR:
$info = $file_name. ": Temporary folder not found";
break;
case UPLOAD_ERR_CANT_WRITE:
$info = $file_name. ": File write failed" ;
break;
case UPLOAD_ERR_OK:
$upload_dir = './'.iconv("UTF-8","gb2312",$file_name);
if(file_exists($upload_dir)){
$info = $file_name. ": The file with the same name already exists";
}else{
if(move_uploaded_file($file_tmp_name,$upload_dir)){
$info = $file_name.": The file was uploaded successfully";
}else{
$info = $file_name. ": File upload failed";
}
}
break;
}
return $info;
}
if(isset($_POST['submit'])){
$info = '';
$count = count($_FILES['upload_file']['name']);
for($i=0; $i<$count; ++$i){
if($_FILES['upload_file']['name' ][$i] == "")
continue;
$info = upload(
$_FILES['upload_file']['error'][$i],
$_FILES['upload_file']['tmp_name'] [$i],
$_FILES['upload_file']['name'][$i]
);
}
echo $info;
}
?>

Copy code

-------------------------------------------------- ----------------------------------------
The code execution results are as follows:

Note:

1. In , name="upload_file[]" must be named in the form of an array, otherwise an error will occur: "Uninitialized string offset: 0", which means that your array key value is out of bounds

2. In $_FILES['upload_file']['name'][$i], upload_file is the name of the upload file marker in the form. When uploading multiple files, the third dimension subscript of the array $_FILES will automatically start from 0 Numbered in sequence.

File upload, PHP