Unlink doesn't work for gzipped files that I downloaded using guzzle

Question

I download lots of gzipped files with foreach loop, in every loop unzip the file. Up to this point everything is okay, but end of the loop I want to unlink the gzipped file. Codes are below.

...
... // Previous processes
...

$destinationPath = './files/lld/' . $data['hour'] . '.gz';
fopen($destinationPath, 'w+');

...
... // Download processes
...

// Unzip
$gzfile = gzopen($destinationPath, "rb");
$tsvFile = fopen($destinationTsvPath, "w");

while ( ! gzeof($gzfile)) 
{
    $string = gzread($gzfile, 4096);
    fwrite($tsvFile, $string, strlen($string));
}

gzclose($gzfile);
fclose($tsvFile);

// Delete
unlink($destinationPath);

Except the unlink process everything is working, and there is no any error log. I have read similar questions in this site, one of the answers is to use unlink() after gzlose() function. I have tried but there is no result.

Answer 1

It seems you do not have enough permissions to remove the file. I suggest you perform a chmod before unlink() like this (this will try to change permission):

fclose($destinationPath);
chmod($destinationPath, 777);
unlink($destinationPath);

If this does not work, then set directory, where you are storing those files, permission to 775 . You can do this via SSH or FTP.