How to give the uploaded image file a unique filename - php

Question

i am running a localhost project. i'm uploading image and some text into localhost phpmysql server. the image file save into images folder. when i upload a image called 1.png its save on the folder as a same name. like this - images/1.png.
what i want - is it possible to change automatically the image file name to a unique one? Like this - images/1.png into images/sgaggjhdzfndzfnd1.png
<?php
session_start();
if (!isset($_SESSION['username'])) {
$_SESSION['msg'] = "You must log in first";
header('location: login.php');
}
if (isset($_GET['logout'])) {
session_destroy();
unset($_SESSION['username']);
header("location: login.php");
}
// Create database connection
include_once('db.php');
// Initialize message variable
$msg = "";
// If upload button is clicked ...
if (isset($_POST['upload'])) {
// Get image name
$image = $_FILES['image']['name'];
// Get text
$image_text = mysqli_real_escape_string($db, $_POST['image_text']);
$text01 = mysqli_real_escape_string($db, $_POST['text01']);
$text02 = mysqli_real_escape_string($db, $_POST['text02']);
// image file directory
$target = "images/".basename($image);
$sql = "INSERT INTO images (image, image_text, text01, text02) VALUES ('$image', '$image_text', '$text01', '$text02')";
// execute query
mysqli_query($db, $sql);
if (move_uploaded_file($_FILES['image']['tmp_name'], $target)) {
$msg = "Image uploaded successfully";
}else{
$msg = "Failed to upload image";
}
}
$result = mysqli_query($db, "SELECT * FROM images ORDER BY id DESC");
?>

Answer 1

You can use PHP's random functions to create random strings for the uploaded file.
mt_rand()
md5()
substr()
So, please modify the line:
$target = "images/".basename($image);
To
$target = "images/". substr(md5(mt_rand(0, 9999)), 0, 21) . '-' . basename($image);
Explanation:
You are adding random string to uploaded file using PHP functions.
Using random strings to rename/save uploaded files fix a severe issue: An image my get overridden if the same image name's file is uploaded.
The uploaded file now has 21 random characters prepended to it. So, there is hardly possibility to have file with same name.

Answer 2

You can use try this it may resolve your issue.
$imageName = GetRandomFileName().".".strtolower(pathinfo($temp['name'], PATHINFO_EXTENSION));
move_uploaded_file($temp['tmp_name'], $imageName);
public function GetRandomFileName() {
$characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$charactersLength = strlen($characters);
$randomString = '';
for ($i = 0; $i < 20; $i++) {
$randomString .= $characters[rand(0, $charactersLength - 1)];
}
$randomString .= time();
return $randomString;
}