Give uploaded image a random name?

Question

How do i give the image a random name instead of taking the name the image currently have when being uploaded?

if(file_exists('folder/' . $_FILES['file']['name'])){
      echo "Change ImageName<br> ";

    } 
    else {
      move_uploaded_file($_FILES['file']['tmp_name'],'folder/' . $_FILES['file']['name']);
    $q = mysqli_query($con, "UPDATE users SET date=now(), image = '".$_FILES['file']['name']."' WHERE username= '$id'");

    }

http://stackoverflow.com/questions/48124/generating-pseudorandom-alpha-numeric-strings to help you make the name then replace $_FILES['file']['name'] with that plus '.jpg'; — Steve, Nov 21 '15 at 23:00

Constantine Poltyrev · Accepted Answer · 2015-11-21T23:16:06.167

3

You can just use the uniqid to generate a unique file name if you don't care about original names.

$newFileName = uniqid('uploaded-', true) 
    . '.' . strtolower(pathinfo($_FILES['file']['name'], PATHINFO_EXTENSION));
move_uploaded_file($_FILES['file']['tmp_name'], 'folder/' . $newFileName);
$q = mysqli_query($con, "UPDATE users SET date=now(), image = '".$newFileName."' WHERE username= '$id'");

edited Nov 21 '15 at 23:16

answered Nov 21 '15 at 23:02

Constantine Poltyrev

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Thanks. How do i get a dot before the image type?(eg jpg) – anon Nov 21 '15 at 23:15
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the call to pathinfo returns the file extension, so the file name will contain the proper extension, though I would add some contents check to ensure it really is an image. See the example snippet. – Constantine Poltyrev Nov 21 '15 at 23:18

score 1 · Answer 2 · edited May 23 '17 at 10:27

1

See StackOverflow Generating (pseudo)random alpha-numeric strings to help you make the random name then replace $_FILES['file']['name'] with the newly generated name plus '.jpg';

Daniel's answer seems quite smooth to me.

edited May 23 '17 at 10:27

Community

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answered Nov 21 '15 at 23:07

Steve

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Give uploaded image a random name?

2 Answers2