php - rename profile picture on upload and insert into database -


can 1 me implement upload script, following code able upload images database therefore change/rename image being uploaded user id uploading image profile picture avoid file overwrite , strictly upload .jpg , .png file only
, advice may give appreciate. 

<?php require("connection.php"); if(@$_post ['submit']) { $file = $_files ['file']; $name1 = $file ['name']; $type = $file ['type']; $size = $file ['size']; $tmppath = $file ['tmp_name'];  if($name1!="") { if(move_uploaded_file ($tmppath, 'users/'.$name1)) { $query="insert profiles set photo='$name1'"; mysql_query ($query) or die ('could not updated:'.mysql_error()); echo "profile picture updated"; } } } ?> 

<?php require("connection.php"); if(@$_post ['submit'])     {         $file = $_files ['file'];         $type = $file ['type'];         $name1 = $user_id.$type;         $size = $file ['size'];         $tmppath = $file ['tmp_name'];         if($type != 'jpg' || $type != 'png') {             echo "file type must jpg or png."            }else{             if($name1!="") {                 if(move_uploaded_file ($tmppath, 'users/'.$name1))                 {                     $query="insert profiles set photo='$name1'";                     mysql_query ($query) or die ('could not updated:'.mysql_error());                     echo "profile picture updated";                 }             }          }//must jpg or png       } } ?>

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