zlib_decode

(PHP 5 >= 5.4.0, PHP 7, PHP 8)

zlib_decode — Uncompress any raw/gzip/zlib encoded data

说明

zlib_decode ( string $data , int $max_length = 0 ) : string|false

Uncompress any raw/gzip/zlib encoded data.

Warning

本函数还未编写文档，仅有参数列表。

参数

data
max_length

返回值

Returns the uncompressed data, 或者在失败时返回 false.

参见

zlib_encode() - Compress data with the specified encoding

User Contributed Notes

anonymous at dekho-ji dot com 17-May-2013 09:10


To decode / uncompress the received HTTP POST data in PHP code, request data coming from Java / Android application via HTTP POST GZIP / DEFLATE compressed format



1) Data sent from Java Android app to PHP using DeflaterOutputStream java class and received in PHP as shown below

echo gzinflate( substr($HTTP_RAW_POST_DATA,2,-4) ) . PHP_EOL  . PHP_EOL;



2) Data sent from Java Android app to PHP using GZIPOutputStream java class and received in PHP code as shown below

echo gzinflate( substr($HTTP_RAW_POST_DATA,10,-8) ) . PHP_EOL  . PHP_EOL;



From Java Android side (API level 10+), data being sent in DEFLATE compressed format

        String body = "Lorem ipsum shizzle ma nizle";

        URL url = new URL("http://www.url.com/postthisdata.php");

        URLConnection conn = url.openConnection();

        conn.setDoOutput(true);

        conn.setRequestProperty("Content-encoding", "deflate");

        conn.setRequestProperty("Content-type", "application/octet-stream");

        DeflaterOutputStream dos = new DeflaterOutputStream(

                conn.getOutputStream());

        dos.write(body.getBytes());

        dos.flush();

        dos.close();

        BufferedReader in = new BufferedReader(new InputStreamReader(

                conn.getInputStream()));

        String decodedString = "";

        while ((decodedString = in.readLine()) != null) {

            Log.e("dump",decodedString);

        }

        in.close();



On PHP side (v 5.3.1), code for decompressing this DEFLATE data will be

    echo substr($HTTP_RAW_POST_DATA,2,-4);



From Java Android side (API level 10+), data being sent in GZIP compressed format



        String body1 = "Lorem ipsum shizzle ma nizle";

        URL url1 = new URL("http://www.url.com/postthisdata.php");

        URLConnection conn1 = url1.openConnection();

        conn1.setDoOutput(true);

        conn1.setRequestProperty("Content-encoding", "gzip");

        conn1.setRequestProperty("Content-type", "application/octet-stream");

        GZIPOutputStream dos1 = new GZIPOutputStream(conn1.getOutputStream());

        dos1.write(body1.getBytes());

        dos1.flush();

        dos1.close();

        BufferedReader in1 = new BufferedReader(new InputStreamReader(

                conn1.getInputStream()));

        String decodedString1 = "";

        while ((decodedString1 = in1.readLine()) != null) {

            Log.e("dump",decodedString1);

        }

        in1.close();



On PHP side (v 5.3.1), code for decompressing this GZIP data will be

    echo substr($HTTP_RAW_POST_DATA,10,-8);



Useful PHP code for printing out compressed data using all available formats.



$data = "Lorem ipsum shizzle ma nizle";

echo "\n\n\n";

for($i=-1;$i<=9;$i++)

    echo chunk_split(strtoupper(bin2hex(gzcompress($data,$i))),2," ") . PHP_EOL  . PHP_EOL;

echo "\n\n\n";

for($i=-1;$i<=9;$i++)

    echo chunk_split(strtoupper(bin2hex(gzdeflate($data,$i))),2," ") . PHP_EOL  . PHP_EOL;

echo "\n\n\n";

for($i=-1;$i<=9;$i++)

    echo chunk_split(strtoupper(bin2hex(gzencode($data,$i,FORCE_GZIP))),2," ") . PHP_EOL  . PHP_EOL;

echo "\n\n\n";

for($i=-1;$i<=9;$i++)

    echo chunk_split(strtoupper(bin2hex(gzencode($data,$i,FORCE_DEFLATE))),2," ") . PHP_EOL  . PHP_EOL;

echo "\n\n\n";



Hope this helps. Please ThumbsUp if this saved you a lot of effort and time.