PHP file upload move_uploaded_file_PHP tutorial

This article will talk about PHP file upload, move_uploaded_file Here we will also use is_uploaded_file to determine whether the file is uploaded successfully. Let’s start the tutorial. ​

This article will talk about php file upload, move_uploaded_file Here we will also use is_uploaded_file to determine whether the file is uploaded successfully. Okay Let’s start the tutorial below.

A very useful aspect of PHP is the ability to manage file uploads to your server. Allowing users to upload files to your server opens up a whole can of worms, so be careful with favorable file uploads.


PHP - File Upload: H TML Form
Before you can use PHP to manage your uploads, you must first create an HTML form that allows users to select files to upload. See our HTML Form Lessons for a more in-depth study of forms.

www.111cn.cn/phper/php.html

This is a brief description of the important parts of the code above:

Yes enctype="multipart/form-data" - is required for the PHP file we are going to create to work properly.
action="uploader.php" - the name of our PHP page that will be created shortly.
method = "post" - used to inform the browser that we want to send information to this server.
input type = "hide" name = "ma... - Set the maximum allowed file size, in bytes, that can be uploaded. This security mechanism is easy to bypass and we will show a solid backup solution in P HP. We have set a maximum file size of 100KB for this example. input name="uploadedfile" -u uploadedfile is how we will access the file in our PHP script.
Save this form of code to a file and call it upload.html. If you view it in a browser it should look like this:

Display:
Select the file to upload:
After the user clicks submit, the data will be posted to the server and the user will be redirected to uploader.php. This PHP file will form the process data and do all the work.

PHP - File Upload: What is PHP?
Now that we have the right HTML form we can start coding the PHP script that is going to handle our uploads. Typically, PHP files should make the important decision for all uploads: keep the file or throw it away. Files may be thrown away for many reasons, including:

The file is too large and you don't want it on your server.
You want the person to upload the image and upload something else, like an executable file (.exe).
There is a problem with the file uploading and therefore you cannot maintain it.
This example is very simple and omits the code that would add this functionality.

PHP - file upload: u uploader.php
When the uploader.php file is executed, the uploaded file exists in a temporary storage area on the server. If the file is not moved to a different location it will be destroyed! To save precious files we are going to use the variable $_FILES associative array.

Pass the $_FILES array where PHP stores all the information in the file. There are two factors in this array that we need to understand for this example. www.111cn.cn/phper/php.html

uploadedfile -u uploadedfile is a reference to the HTML form we specified in ours. We will need this notification via the $_FILES array for the files we want to play with.
Variable $_FILES['uploadedfile']['name'] - The name contains the original path to the user-uploaded file.
Variable $_FILES [ ' uploadedfile ' ] [ ' tmp_name ' ] -t mp_name contains the path where temporary files are stored on the server. The file should exist in a temporary directory on the server with a temporary name.
Now, we can finally start writing a basic PHP script for the upload manager! Here's how we take the temporary file name, choose a permanent name, and choose a place to store the archive.

$target_path = "uploads/";

/* Add the original filename to our target path.
Result is "uploads/filename.extension" */
$target_path = $target_path . basename( $_FILES['uploadedfile']['name']);

Now, all we have to do is call the move_uploaded_file function and let PHP do its magic. The move_uploaded_file function needs to know 1) the path to the temporary file (check!) and 2) the path it is moved to (check!).

$target_path = "uploads/";

$target_path = $target_path . basename( $_FILES['uploadedfile']['name']);

if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
echo "The file ". basename( $_FILES['uploadedfile']['name']).
" has been uploaded";
} else{
echo "There was an error uploading the file, please try again!";
}

Please indicate when reprinting: www.111cn.cn/phper/php.html