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    zlib_decode

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

    zlib_decode — raw/gzip/zlib で符号化されたデータを復元する

    説明

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

    raw/gzip/zlib で符号化されたデータを復元します。

    警告

    この関数は、 現在のところ詳細な情報はありません。引数のリストのみが 記述されています。

    パラメータ

    data

    max_length

    戻り値

    圧縮されていないデータを返します。失敗した場合に false を返します。

    参考

    • zlib_encode() - 指定した符号化方式でデータを圧縮する

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    User Contributed Notes 1 note

    up
    13
    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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