Generate Random filename?

[Mr Chris]

Hi Guys,

 

I have an upload script, which works great.  It uploads media to a folder and saves the details in a MYSQL database:

 

<?php 

if($_POST["x"] == "Upload"){ 

  $target_path = "../../../story_media/video/"; 

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

  if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) { 
            header("Location: http://www.thevillager.co.uk/cms_admin/editorial/edit_list.php"); 
      

        // Start the connection to the database 

        include('***************');
        $can_i_connect = db_connect(); // by db_connect function is in my include file 
        if(!$can_i_connect) 
        { 
            $msg = "Could not connect to the database"; 
        } 

        // End the connection to the database    

        // insert into database 
        $date_uploaded = date("m d, Y"); 
        $directory = "video/"; 
        $file_name = basename( $_FILES['uploadedfile']['name']); 
        $video_caption = stripslashes(trim($_POST['video_caption'])); 
        $video_credit = stripslashes(trim($_POST['video_credit'])); 
        $story_id = $_GET['story_id']; 
      

        $sql_query = mysql_query("INSERT INTO cms_videos (date_uploaded,directory,file_name,video_caption,video_credit,story_id) VALUES ('$date_uploaded','$directory','$file_name','$video_caption','$video_credit','$story_id')"); 
        if (!$sql_query) { 
            exit("<p>Error performing query: " . mysql_error() . "</p>"); 
        } 
    } else{ 
        echo "There was an error uploading the file, please try again!"; 
    } 
    exit; 
} 
?>

 

However, what I’d also like it to do is generate a randomly generated name

 

So by doing some research I put this together:

 

<?php

if($_POST["x"] == "Upload"){ 

$Fname=$_FILES['uploadedfile']['name'];


//Function to strip the extension of a filename string
  function strip_ext($name) 
   { 
 $ext = strrchr($name, '.'); 
 if($ext !== false) 
   { 
 $name = substr($name, 0, -strlen($ext)); 
 } 
  return $name; 
 } 

// This will get the extension of the filename
$FnameExt= end(explode('.',$Fname)); 

function createRandomName() {

    $chars = "abcdefghijkmnopqrstuvwxyz023456789";
    srand((double)microtime()*10000000);
    $i = 0;
    $pass = '' ;

    while ($i <= 7) {
        $num = rand() % 33;
        $tmp = substr($chars, $num, 1);
        $pass = $pass . $tmp;
        $i++;
    }

    return $pass;

}

// Usage
$randomName = createRandomName();

//retrieve file name



// Where the file is going to be placed 
$target_path = "../../../story_media/video/";

/* Add the original filename to our target path.  
Result is "uploads/filename.extension" */
$target_path = "../../../story_media/video/";
$_FILES['uploadedfile']['tmp_name'];



if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path.'/'.$randomName.".".$FnameExt)) {
header("Location: edit_list.php"); 

// Start the connection to the database 

        include('******************');
        $can_i_connect = db_connect(); // by db_connect function is in my include file 
        if(!$can_i_connect) 
        { 
            $msg = "Could not connect to the database"; 
        } 

        // End the connection to the database    

        // insert into database 
        $date_uploaded = date("m d, Y"); 
        $directory = "video/"; 
        $file_name = basename( $_FILES['uploadedfile']['name']); 
        $video_caption = stripslashes(trim($_POST['video_caption'])); 
        $video_credit = stripslashes(trim($_POST['video_credit'])); 
        $story_id = $_GET['story_id']; 
      

        $sql_query = mysql_query("INSERT INTO cms_videos (date_uploaded,directory,file_name,video_caption,video_credit,story_id) VALUES ('$date_uploaded','$directory','$file_name','$video_caption','$video_credit','$story_id')"); 
        if (!$sql_query) { 
            exit("<p>Error performing query: " . mysql_error() . "</p>"); 
        } 
    } else{ 
        echo "There was an error uploading the file, please try again!"; 
    } 
    exit; 
} 
?>

 

…However, the page just hangs when you try to load it (ie continues to try and load forever!).

 

Can anyone advise?

 

Thanks

 

Chris

[Orio]

If you want to generate a unique filename, you can use tempnam() to help you:

 

<?php

function unique_name()
{
$name = tempnam("/", "");
unlink($name);
return $name;
}

?>

 

 

Orio.

[Mr Chris]

Thanks,

 

But i've tried putting this piece of code into my first upload code as I thought the function would simply overwrite the existing name, which works and thought it would replace the name, but it throws up a move_uploaded_file() error?

 

<?php 

if($_POST["x"] == "Upload"){ 

  $target_path = "../../../story_media/video/"; 

function unique_name()
{
$name = tempnam("/", "");
unlink($name);
return $name;
}

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

  if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) { 
            header("Location: http://www.thevillager.co.uk/cms_admin/editorial/edit_list.php"); 
      

        // Start the connection to the database 

        include('***************');
        $can_i_connect = db_connect(); // by db_connect function is in my include file 
        if(!$can_i_connect) 
        { 
            $msg = "Could not connect to the database"; 
        } 

        // End the connection to the database    

        // insert into database 
        $date_uploaded = date("m d, Y"); 
        $directory = "video/"; 
        $file_name = basename( $_FILES['uploadedfile']['name']); 
        $video_caption = stripslashes(trim($_POST['video_caption'])); 
        $video_credit = stripslashes(trim($_POST['video_credit'])); 
        $story_id = $_GET['story_id']; 
      

        $sql_query = mysql_query("INSERT INTO cms_videos (date_uploaded,directory,file_name,video_caption,video_credit,story_id) VALUES ('$date_uploaded','$directory','$file_name','$video_caption','$video_credit','$story_id')"); 
        if (!$sql_query) { 
            exit("<p>Error performing query: " . mysql_error() . "</p>"); 
        } 
    } else{ 
        echo "There was an error uploading the file, please try again!"; 
    } 
    exit; 
} 
?>