php - how to rename file name while uploading -

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i have file 2 input fields 1 file name (user type) , second 1 choosing file want upload file directory name user typed. down code i'm using guys please me how change file name user typed.

<?php  $filename = $_post["file"] $upload   = $_files['userfile'];   $target_path = "upload/";  $target_path .= $upload["name"];  $newname = "anything";  if(move_uploaded_file($upload["tmp_name"], $target_path))     {         echo "uploaded successfully";     } ?>

change $target_path .= $upload["name"]; $target_path .= $filename;.

edit: record, have letting people upload files (and choose extension) web server raises serious security concerns. suggest @ least disabling ability execute scripts in target folder.


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