how to rename uploaded files if there's duplicated names - php

Question

i'm having a small issue in the duplicated names.
I want to auto rename any duplicated upload files, like numbering them.
or if i could make the name same with numbers, such as file1.jpg / file2.jpg
for all uploaded files
here's my code
<?php
include('connect-db.php');
if (isset($_POST['submit'])) {
$filename= $_FILES["imgfile"]["name"];
if ((($_FILES["imgfile"]["type"] == "image/gif")|| ($_FILES["imgfile"]["type"] == "image/jpeg") || ($_FILES["imgfile"]["type"] == "image/png") || ($_FILES["imgfile"]["type"] == "image/pjpeg")) && ($_FILES["imgfile"]["size"] < 20000000))
{
if(file_exists($_FILES["imgfile"]["name"]))
{
echo "File name exists.";
}
else
{
move_uploaded_file($_FILES["imgfile"]["tmp_name"],"photos/$filename");
}
}
if (is_numeric($_POST['id'])) {
$id = $_POST['id'];
$id_photo= mysql_real_escape_string(htmlspecialchars($_POST['filename']));
// check that firstname/lastname fields are both filled in
if ($filename== '' ) {
// generate error message
$error = 'ERROR: Please fill in all required fields!';
echo("<meta http-equiv='refresh' content='0'>"); //Refresh by HTTP META
} else {
// save the data to the database
mysql_query("UPDATE table SET id_photo='$filename' WHERE id='$id' ") or die(mysql_error());
// once saved, redirect back to the view page
echo("<meta http-equiv='refresh' content='0'>"); //Refresh by HTTP META
}
} else {
// if the 'id' isn't valid, display an error
echo 'Error!';
}
}
?>
Even the echo of if(file_exists($_FILES["imgfile"]["name"])) it's not working, i don't know why
Thank you very much before replying

Answer 1

try this code
this code will never get same name this code will rename file like 2jh5425h44u5h45h454k5image.jpg this is how it will save file so no need to worry about duplicate file
i have added random name generator $newname = md5(rand() * time()); this will generate random name for your file
<?php
include('connect-db.php');
$newname = md5(rand() * time());
if (isset($_POST['submit'])) {
$filename = $_FILES["imgfile"]["name"];
if ((($_FILES["imgfile"]["type"] == "image/gif") || ($_FILES["imgfile"]["type"] == "image/jpeg") || ($_FILES["imgfile"]["type"] == "image/png") || ($_FILES["imgfile"]["type"] == "image/pjpeg")) && ($_FILES["imgfile"]["size"] < 20000000)) {
if (file_exists($_FILES["imgfile"]["name"])) {
echo "File name exists.";
} else {
move_uploaded_file($_FILES["imgfile"]["tmp_name"], "photos/$newname . $filename");
}
}
if (is_numeric($_POST['id'])) {
$id = $_POST['id'];
$id_photo = mysql_real_escape_string(htmlspecialchars($_POST['filename']));
// check that firstname/lastname fields are both filled in
if ($filename == '') {
// generate error message
$error = 'ERROR: Please fill in all required fields!';
echo("<meta http-equiv='refresh' content='0'>"); //Refresh by HTTP META
} else {
// save the data to the database
mysql_query("UPDATE table SET id_photo='$filename' WHERE id='$id' ") or die(mysql_error());
// once saved, redirect back to the view page
echo("<meta http-equiv='refresh' content='0'>"); //Refresh by HTTP META
}
} else {
// if the 'id' isn't valid, display an error
echo 'Error!';
}
}
?>
if you need to rename only if file is duplicate here is answer Renaming duplicate files in a folder with php