如何在不覆盖目标文件的情况下复制文件？

Question

The script I made is.

<?php

$source_file = 'http://www.domain.tld/directory/img.png'; 
$dest_file = '/home/user/public_html/directory/directory/img.png'; 

copy($source_file, $dest_file);

?>

I need that image to not be delete and reuploaded every time the script is running. I would either want it to be img1.png, img2.png, img3.png, etc. Or img(Date,Time).png, img(Date,Time).png, etc. Is this possible and if so, how do I do this?

Answer 1

If you're concerned with overwriting a file, you could just drop in a timestamp to ensure uniqueness:

$dest_file = '/home/user/public_html/directory/directory/img.png';

// /home/user/public_html/directory/directory/img1354386279.png
$dest_file = preg_replace("/\.[^\.]{3,4}$/i", time() . "$0", $dest_file);

Of if you wanted simpler numbers, you could take a slightly more tasking route and change the destination file name as long as a file with that name already exists:

$file = "http://i.imgur.com/Z92wU.png";
$dest = "nine-guy.png";

while (file_exists($dest)) {
    $dest = preg_replace_callback("/(\d+)?(\.[^\.]+)$/", function ($m) {
        return ($m[1] + 1) . $m[2];
    }, $dest);
}

copy($file, $dest);

You may need to be using a later version of PHP for the anonymous function callback; I tested with 5.3.10 and everything worked just fine.

Answer 2

<?php

$source_file = 'http://www.domain.tld/directory/img.png'; 
$dest_file = '/home/user/public_html/directory/directory/img.png'; 
if(!is_file($dest_file)){
copy($source_file, $dest_file);
}
else{
$fname = end(explode('/',$dest_file));
$fname = time().'-'.$fname;
$dest_file = dirname($dest_file).'/'.$fname;
copy($source_file,$dest_file);
}
?>

use this code This will add time before filename

Answer 3

You can use rename().

For Example:

rename ("/var/www/files/file.txt", "/var/www/sites/file1.txt");

Or You can also use copy

$source_file = 'http://www.domain.tld/directory/img.png'; 
$dest_file = '/home/user/public_html/directory/directory/img.png'; 
if(!is_file($dest_file)){
copy($source_file, $dest_file);
}

Or if you want to add time it ,you can try like this.

 $source="http://www.domain.tld/directory/";
 $destn ="/home/user/public_html/directory/directory/";
 $filename="image.png";
 $ex_name = explode('.',$filename));
 $newname = $ex_name[0].'-'.time().$ex_name[1]; //where $ex_name[0] is filename and $ex_name[1] is extension.

 copy($source.filename,$destn.$newname );

Answer 4

$source_file = 'http://www.domain.tld/directory/img.png'; 
$dest_file = '/home/user/public_html/directory/directory/img'.uniqid().'.png'; 
copy($source_file, $dest_file);

uniquid gives you a unique Id which is rarely possible to overwrite...

also i would make folders for each month or related to the id of the image

like

mkdir(ceil($imgId / 1000), 0777);