Rename File before Storing in Server PHP - php

Question

I need to know code how to rename file before it gets uploaded to my server in php script.Ill post the php code of mine.
I need it because I am uploading an image from phone and I don't want it to be overwritten.
Can I achieve that?
<?php
$file_path = "uploads/";
$file_path = $file_path . basename( $_FILES['uploaded_file']['name']);
if(move_uploaded_file($_FILES['uploaded_file']['tmp_name'], $file_path)) {
echo "success";
} else{
echo "fail";
}
?>

Answer 1

For renaming file in Android, you can do :
String file_path = <file path off your existing file you want to rename>
File from = new File(file_path,"from.txt");
File to = new File(file_path,"to.txt");
from.renameTo(to);
This code will work for both file stored in internal or external storage. Just for writing to external storage remember you need to have android.permission.WRITE_EXTERNAL_STORAGE to be added to your Android manifest.

Answer 2

write your code like below.
$filename = $_FILES['upload_file']['name'];
$newname = 'alteredtext'.$filename; // you can also generate random number and concat on start.
$tmp_path = $_FILES['upload_file']['tmp_name'];
if(move_uploaded_file($mp_path, $newname)) {
echo "success";
} else{
echo "fail";
}

Answer 3

You don't need to use the name passed in the $_FILES array when moving the file. You can create any name you want (assuming the path is valid) and pass it as the second argument of move_uploaded_file. If you want a semi-random name, you could generate a random number and then hash it or something to create the filename.
If you want to check first, if the file exists, then rename it to have a numeric suffix, you could do this:
<?php
$base_path = "uploads/";
$file_path = $base_path . basename( $_FILES['uploaded_file']['name']);
if(file_exists($file_path)) {
$ctr = 0;
do { // increment an index to append to the filepath
$ctr++;
$file_path = $base_path . basename( $_FILES['uploaded_file']['name']) . "_$ctr";
} while(file_exists($file_path));
}
if(move_uploaded_file($_FILES['uploaded_file']['tmp_name'], $file_path)) {
echo "success";
} else{
echo "fail";
}
?>
The above snippet will keep incrementing until it finds a filename that doesn't exist. Of course, you'd want to add some bounds and error checking, while the above snippet demonstrates the concept, it isn't entirely production ready.