CODEWITHSUNDEEP
phpfile-get-contents
BrownChiLD
BrownChiLD

Reputation: 3713

What's the best way to copy an image file from another domain onto local? PHP

I need to periodically backup an image file (as is) from my public server onto my local dev server..

What's the best way to go about it? a simple combination of file_get_contents and file_put_contents? or is there some other ways to do this?

and if it's file_get_contents() way, how does one get the contents of an image file properly/exactly in order to simply write it via file_put_contents because i don't think a simple file read is enough. (current tests are writing blank zero byte jpgs).

regards

Upvotes: 0

Views: 1221

Answers (3)

Michał Czerwiński
Michał Czerwiński

Reputation: 97

It is not recommended to use file_get_contents to copy big files, as it loads the entire file to memory and could cause a crash if memory is short.

A better solution is to read it by chunks:

function getUrlFile($url, $path)
    {
        $newfilename = $path;
        $file = fopen($url, "rb");
        if ($file) {
            $newfile = fopen($newfilename, "wb");
            if ($newfile)
                while (!feof($file)) {
                    fwrite($newfile, fread($file, 1024 * 8), 1024 * 8);
                }
        }
        if ($file) {
            fclose($file);
        }
        if ($newfile) {
            fclose($newfile);
        }
    }

Upvotes: 1

ʰᵈˑ
ʰᵈˑ

Reputation: 11375

Multiple ways you can do this (if we don't restrict ourselves to PHP)

Shell script triggered by a cron (on remote machine)

The script runs a rsync or scp command to copy the file over via SSH.

scp -i ~/.ssh/id_rsa /var/www/html/image.png foo@local-dev-machine:/var/www/html

file_get_contents, like you've said (on local machine)

A URL can be used as a filename with this function if the fopen wrappers have been enabled. See fopen() for more details [...]

$url = 'http://hostname/images/image.png';
file_put_contents('/var/www/html/image.png', file_get_contents($url));

cURL, with PHP (on local machine)

$ch = curl_init ($url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);
$raw=curl_exec($ch);
curl_close ($ch);
if(file_exists($saveto)){
    unlink($saveto);
}
$fp = fopen($saveto,'x');
fwrite($fp, $raw);
fclose($fp);

Upvotes: 1

Let me see
Let me see

Reputation: 5094

As you already know

Use file_get_contents() and  file_put_contents

$url = 'http://hostname/images/wml.gif';
file_put_contents('/your_path/image.gif', file_get_contents($url));

Upvotes: 2

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