PHP Development File Upload

1. Configure the php.ini file
The following property values are primarily set:


2, pre-defined variables
The list is as follows:

Create an upload field to upload the file data via the _files variable output. The sample code is as follows:

<form Action="" enctype="Multipart/form-data" method ="POST" name="UploadFile">Upload file:<input type="file" name="Upfile" /><br> <input type="Submit" value="Upload" /></form>  <?php if (Is_uploaded_file ($_files[' Upfile '] [' Tmp_name '])) {    $upfile =$_files["Upfile"]; foreach ($upfile  as $value) { echo $value.    "<br>"; }}?> 

The results of the operation are as follows:

3, File upload function
PHP uses the Move_uploaded_file () function to upload files with the following syntax:
BOOL Move_uploaded_file (string filename,string destination)
The function uploads the file to the specified location and returns True if successful, and false if it fails. parameter filename, temporary file name, $_file[tmp_name]; parameter destination is the new path and name saved after uploading.

The sample code is as follows:

<form action=""Enctype="Multipart/form-data"Method="POST"Name="UploadFile"> Upload files: <inputtype="File"Name="Upfile"/><br> <inputtype="Submit"Value="Upload"/></form> <?phpif(Is_uploaded_file ($_files[' Upfile '][' Tmp_name '])) {$upfile=$_files["Upfile"];if(Move_uploaded_file ($upfile[' Tmp_name '],$upfile[' name '])) {Echo "Upload succeeded"; }Else{Echo "Upload failed"; }}?>

The results of the operation are as follows:

4, multi-file upload
There are many ways to upload multiple files, we have evolved a multi-file upload based on a single file. The code examples are as follows:

<form Action="index.php" enctype="Multipart/form-data" Method="POST" name="UploadFile">Upload file:<br> <input type="file" name="Upfile1" /><br><input type="file" name="Upfile2" /><br><input type="file" name="Upfile3" /><br><input type="Submit" value="Upload" /><br> </form> <?php //Header (' Content-type:text/html;charset=utf-8 ');$file 1=$_files[' Upfile1 '];$file 2=$_files[' Upfile2 '];$file 3=$_files[' Upfile3 '];if($file 1[' ERROR '] = = UPLOAD_ERR_OK) {Echo "Path:".$file 1[' name ']."<br>";if(Move_uploaded_file ($file 1[' Tmp_name '],$file 1[' name '])) {Echo "Upload success <br>"; }Else{Echo "Upload failed <br>"; }}if($file 2[' ERROR '] = = UPLOAD_ERR_OK) {Echo "Path:".$file 2[' name ']."<br>";if(Move_uploaded_file ($file 2[' Tmp_name '],$file 2[' name '])) {Echo "Upload success <br>"; }Else{Echo "Upload failed <br>"; }}if($file 3[' ERROR '] = = UPLOAD_ERR_OK) {Echo "Path:".$file 3[' name ']."<br>";if(Move_uploaded_file ($file 3[' Tmp_name '],$file 3[' name '])) {Echo "Upload success <br>"; }Else{Echo "Upload failed <br>"; }        }?>

The results of the operation are as follows:

The sample code for the second way to upload multiple files is as follows:

<form Action="index.php" enctype="Multipart/form-data"  Method="POST" name="UploadFile">Upload file:<br> <input type="file" name="upfile[]" /><br><input type="file" name="upfile[]" /><br><input type="file" name="upfile[]" /><br><input type="Submit" value="Upload" /><br> </form> <?php //Header (' Content-type:text/html;charset=utf-8 ');$filearray=$_files[' Upfile '];p Rint_r ($filearray);foreach($filearray[' ERROR '] as $key=$error){if($error==UPLOAD_ERR_OK) {Echo "file name:".$filearray[' name '][$key]."<br>";if(Move_uploaded_file ($filearray[' Tmp_name '][$key],$filearray[' name '][$key])) {Echo "Upload success <br>"; }Else{Echo "Upload failed <br>"; }    }}?>

The results of the operation are as follows:

In addition to the above two, there is a third way to upload multiple files, of course, I think the most perfect way, is to select multiple files at once to upload. The main thing is to use swfupload to achieve. Because my current knowledge is limited, I will study this together with everyone in the back.

PHP Development File Upload