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    zlib_decode

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

    zlib_decode — Descomprime datos codificados en craw/gzip/zlib

    Descripción

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

    Descomprime datos codificados en raw/gzip/zlib.

    Advertencia

    Esta función no está documentada actualmente, solamente se encuentra disponible la lista de parámetros.

    Parámetros

    data

    max_length

    Valores devueltos

    Devuelve los datos no comprimidos, o false en caso de error.

    Ver también

    • zlib_encode() - Comprime datos con la codificación especificada
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    User Contributed Notes 1 note

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    9
    anonymous at dekho-ji dot com
    11 years ago
    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.
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