php save image with specific file name not overwriting each other

Question

I hope someone can help me with this php code. At the moment its just saving an image with the file name "img.png" to the server but with every time a new canvas screenshot is taken the image is just overwritten.

My aim is to create a new unique (like numbered chronological by time taken) file name for the images with every new screenshot and save it on the server.

Here the php code so far:

$data = $_REQUEST['base64data']; 
echo $data;

$image = explode('base64,',$data); 

file_put_contents('img.png', base64_decode($image[1]));

Thank you. regards

score 1 · Accepted Answer · answered Sep 19 '13 at 19:50

1

Try

$filename = 'img_'.date('Y-m-d-H-s').'.png';
file_put_contents($filename, base64_decode($image[1]));

This will save your file with a filename containing the current date and time, e.g.

img_2013-09-19-21-50.png

answered Sep 19 '13 at 19:50

Gottlieb Notschnabel

9,408
18
74
116

perfect thx. Is it also possible to get the IP of the user who clicked or unique browser data to implement into the file name? – Mazey Sep 19 '13 at 20:10
1

You might want to include information from [the PHP `$_SERVER` variable](http://php.net/manual/en/reserved.variables.server.php). For example: `$filename = 'img_'.$_SERVER['REMOTE_ADDR'].'.png';`. – Gottlieb Notschnabel Sep 19 '13 at 20:15

score 0 · Answer 2 · answered Sep 19 '13 at 19:50

Try using a session variable to increment a counter like so:

<?php
session_start();
if(!isset($_SESSION['counter'])){
    $_SESSION['counter'] = 0;
}
$_SESSION['counter']++;

$data = $_REQUEST['base64data']; 
echo $data;

$image = explode('base64,',$data); 

file_put_contents('img'.$_SESSION['counter'].'.png', base64_decode($image[1])); 
?>

score 0 · Answer 3 · answered Sep 19 '13 at 19:50

There's several ways to do it, but the easiest is just to add a timestamp/datestamp to the image name. Format the name as you want.

$img_name = 'img'.date('YmdHisu').'.png'; // Date & time with microseconds
$img_name = 'img'.time().'.png'; // unix timestamp

score 0 · Answer 4 · answered Sep 19 '13 at 19:52

0

Leave the base64data structure use this one it will work fine.

$fileName = preg_replace('#[^a-z.0-9]#i', '', $fileName); 
$image = explode(".", $fileName);

It will give a random number to each image file.

answered Sep 19 '13 at 19:52

Aitazaz Khan

1,609
1
13
35

How would this give the filename a random number? This would only remove all letters and numbers from the filename, wouldn't it? – Gottlieb Notschnabel Sep 20 '13 at 08:35
because i have did it thats why it will give. – Aitazaz Khan Sep 20 '13 at 10:21
the name will remain the same but in front of name you will get a random number each time you will upload the image or some file. – Aitazaz Khan Sep 20 '13 at 10:23
http://stackoverflow.com/questions/18739864/i-am-getting-error-while-upload-the-txt-extension-file-and-doc-extension-files/18739961#18739961 – Aitazaz Khan Sep 20 '13 at 10:26
see this code and you will get clear what i wanted to provide – Aitazaz Khan Sep 20 '13 at 10:27
You are wrong! This is the line that creates the random number into your filename: `$fileName = $id . "(" . time() . rand() . ")." . $fileExt;`. – Gottlieb Notschnabel Sep 20 '13 at 10:48
bro i think you are not getting me i am saying that the file name will remain the same but in the bracket the random number will be change . – Aitazaz Khan Sep 22 '13 at 16:37
You're making my argument here :-) – Gottlieb Notschnabel Sep 30 '13 at 09:40
because you are not getting me although – Aitazaz Khan Oct 02 '13 at 08:03
Your code does nothing, but splitting the filename by the dot. [See here](http://codepad.org/LMzTNfxd). But [look what it does](http://codepad.org/EcLp4LBC) when you add the line I mentioned in my comment above. – Gottlieb Notschnabel Oct 02 '13 at 10:10
and above your comment i have given a link where you can see the whole program. if you dont mind go ahead and check it – Aitazaz Khan Oct 02 '13 at 10:39

score 0 · Answer 5 · edited May 23 '17 at 12:28

0

either create a UID using uniqid() function for the filename or create a folder with the name of the username who is uploading the file and leave the original filename. The disadvantage of the first one is that you will have to save the original filename somewhere to show to the user.

https://stackoverflow.com/a/4371988/2701758

edited May 23 '17 at 12:28

Community

1
1

answered Sep 19 '13 at 19:55

Mario.Hydrant

196
7

score 0 · Answer 6 · answered Apr 09 '20 at 03:52

**

 
 /* simply for local time first give your continent then '/' then your country's 
 capital.
*/ 
   date_default_timezone_set('Asia/Dhaka');
    
    $now = new DateTime();
    $now = $now->format("Y-m-d H:i:s.u");
    
    $new_name = $now.$image;
  /*what you want to add just write with dot,such 
    $new_name = 'img'.$now.$image;
   */

**

php save image with specific file name not overwriting each other

6 Answers6