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21 years ago
<?php

/**

 * @return bool

 * @param string $in

 * @param string $out

 * @desc compressing the file with the bzip2-extension

*/

function bzip2 ($in, $out)

{

    if (!file_exists ($in) || !is_readable ($in))

        return false;

    if ((!file_exists ($out) && !is_writeable (dirname ($out)) || (file_exists($out) && !is_writable($out)) ))

        return false;

    

    $in_file = fopen ($in, "rb");

    $out_file = bzopen ($out, "wb");

    

    while (!feof ($in_file)) {

        $buffer = fgets ($in_file, 4096);

         bzwrite ($out_file, $buffer, 4096);

    }



    fclose ($in_file);

    bzclose ($out_file);

    

    return true;

}



/**

 * @return bool

 * @param string $in

 * @param string $out

 * @desc uncompressing the file with the bzip2-extension

*/

function bunzip2 ($in, $out)

{

    if (!file_exists ($in) || !is_readable ($in))

        return false;

    if ((!file_exists ($out) && !is_writeable (dirname ($out)) || (file_exists($out) && !is_writable($out)) ))

        return false;



    $in_file = bzopen ($in, "rb");

    $out_file = fopen ($out, "wb");



    while ($buffer = bzread ($in_file, 4096)) {

        fwrite ($out_file, $buffer, 4096);

    }

 

    bzclose ($in_file);

    fclose ($out_file);

    

    return true;

}

?>
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