CODEWITHSUNDEEP
phpimageweb-services
Andy
Andy

Reputation: 381

Image file management in a web service

I'm developing a web service in php which generates images using an external application. After generating the image file is inserted into the html page. Like this:

<img src="img/52454879c7158.png">

After viewing the file, it is no longer needed. But in the end in a folder with pictures accumulate a large number of files. How can I automate the deletion of files?

Upvotes: 1

Views: 253

Answers (2)

Ashwin Parmar
Ashwin Parmar

Reputation: 3045

You should periodically delete files in a specific directory the unix program find comes to the rescue. In your specific case you needed to delete all the image files from a img folder that where older than 1 days.

This is the crontab entry to accomplish that:

Command is

crontab -l

Linux Crontab Format

MIN HOUR DOM MON DOW CMD

0 0 * * * /usr/bin/find /yourpathto/img/ -type f -name '*.png' -mtime +1 -exec rm {} \;

(everything in one line)

The code runs the program /usr/bin/find every day at midnight (0 0 * * *). It checks the directory called /yourpathto/img for everything that is a file (-type f), has a name that ends in .png (-name '*.png') and is created 1 days ago or before that (-mtime +1). The command then executes rm (remove) on all those files (-exec rm {} \;).

Or, You can use the *.* to remove all the files inside /yourpathto/img/*.*

after setting-up the crontab it is automatically run and remove all the files from your /yourpathto/img/ directory.

Alternate Option to delete files:

function removeall()
{
    $files = glob('path/to/img/*'); // get all file names
    foreach($files as $file){ // iterate files
      // Here you should make one condition that if user has view / download this file and remove it 
      if(is_file($file))
        unlink($file); // delete file
    }
}

Here you should apply something that if user has download file than this function will be call to remove files.

Upvotes: 1

Padmanathan J
Padmanathan J

Reputation: 4620

delete time just use unlink

unlink(folder/filename);

Example

unlink("folder/images/image_name.jpeg");

Show Image after delete image using php

$imageUrl = "/images/123.jpg"; // link to image
$imginfo = getimagesize($imageUrl); // get mime info

header("Content-type: " . $imginfo['mime']); // add Content-type header

readfile($imageUrl); // show image

unlink($imageUrl); // delete image

Upvotes: 1

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