Question

I am using below script for spliting a large zip file in small chucks.

$filename = "pro.zip"; 
$targetfolder = '/tmp';

// File size in Mb per piece/split. 
// For a 200Mb file if piecesize=10 it will create twenty 10Mb files
$piecesize = 10; // splitted file size in MB


$buffer = 1024;
$piece = 1048576*$piecesize;
$current = 0;
$splitnum = 1;

if(!file_exists($targetfolder)) {
    if(mkdir($targetfolder)) {
        echo "Created target folder $targetfolder".br();
    }
}

if(!$handle = fopen($filename, "rb")) {
    die("Unable to open $filename for read! Make sure you edited filesplit.php correctly!".br());
}

$base_filename = basename($filename);

$piece_name = $targetfolder.'/'.$base_filename.'.'.str_pad($splitnum, 3, "0", STR_PAD_LEFT);
if(!$fw = fopen($piece_name,"w")) {
    die("Unable to open $piece_name for write. Make sure target folder is writeable.".br());
}
echo "Splitting $base_filename into $piecesize Mb files ".br()."(last piece may be smaller in size)".br();
echo "Writing $piece_name...".br();
while (!feof($handle) and $splitnum < 999) {
    if($current < $piece) {
        if($content = fread($handle, $buffer)) {
            if(fwrite($fw, $content)) {
                $current += $buffer;
            } else {
                die("filesplit.php is unable to write to target folder");
            }
        }
    } else {
        fclose($fw);
        $current = 0;
        $splitnum++;
        $piece_name = $targetfolder.'/'.$base_filename.'.'.str_pad($splitnum, 3, "0", STR_PAD_LEFT);
        echo "Writing $piece_name...".br();
        $fw = fopen($piece_name,"w");
    }
}
fclose($fw);
fclose($handle);
echo "Done! ".br();
exit;

function br() {
    return (!empty($_SERVER['SERVER_SOFTWARE']))?'<br>':"\n";
}
?> 

But this script not creating small files after split in target temp folder. Script runs successfully without any error.

Please help me to found out what is issue here? Or If you have any other working script for similar functinality, Please provide me.

Answer 1

As indicated in the comments above, you can use split to split a file into smaller pieces, and can then use cat to join them back together.

split -b50m filename x

and to put them back

 cat xaa xab xac > filename

If you are looking to split the zipfile into a spanning type archive, so that you do not need to rejoin the them together take a look at zipsplit

 zipslit -n (size) filename  

so you can just call zipsplit from your exec script and then most standard unzip utils should be able to put it back together. man zipslit for more options, including setting output path, etc..