zlib://

bzip2://

zip://

压缩流

说明

compress.zlib://andcompress.bzip2://

zlib:的功能类似gzopen()，但是其数据流还能被fread()和其他文件系统函数使用。自 PHP 4.3.0 后这个不建议被使用，因为会和其他带“:”字符的文件名混淆；请使用compress.zlib://作为替代。

compress.zlib://、compress.bzip2://和gzopen()、bzopen()是相等的。并且可以在不支持 fopencookie 的系统中使用。

ZIP 扩展注册了zip:封装器。自 PHP 7.2.0 和 libzip 1.2.0+起，加密归档开始支持密码，允许数据流中使用密码。字节流上下文（stream contexts）中使用'password'选项设置密码。

可选项

• compress.zlib://file.gz
• compress.bzip2://file.bz2
• zip://archive.zip#dir/file.txt

用法

One-liners to gzip and ungzip a file:
copy('file.txt', 'compress.zlib://' . 'file.txt.gz');
copy('compress.zlib://' . 'file.txt.gz', 'file.txt');

Example on how to read an entry from a ZIP archive (file "bar.txt" inside "./foo.zip"):
<?php
$fp = fopen('zip://./foo.zip#bar.txt', 'r');
if( $fp ){
  while( !feof($fp) ){
    echo fread($fp, 8192);
  }
  fclose($fp);
}
?>
Also, apparently, the "zip:" wrapper does not allow writing as of PHP/5.3.6. You can read http://php.net/ziparchive-getstream for further reference since the underlying code is probably the same.

Prior to PHP 5.6 i used code like 
<?php
file_get_contents("compress.zlib://php://input");
?>
to read gz-compressed or plain input file. Not it doesn't work.
Simple workaround :
<?php
//file_get_contents("compress.zlib://php://input");
class gzip_header_filter8 extends php_user_filter {
  private $filtered = 0;
  public function filter($in, $out, &$consumed, $closing) {
    while ($bucket = stream_bucket_make_writeable($in)) {
      if($this->filtered == 0) {
        $header_len = 8;
        $header = substr($bucket->data, 0, 8);
        $flags = ord($header[1]);
        if($flags & 0x08) {
          // a filename is present
          $header_len = strpos($bucket->data, "\0", 8) + 1;
        }
        $bucket->data = substr($bucket->data, $header_len);
        $this->filtered = $header_len;
      }
      $consumed += $bucket->datalen;
      stream_bucket_append($out, $bucket);
    }
    return PSFS_PASS_ON;
  }
}
stream_filter_register('gzip_header_filter8', 'gzip_header_filter8');
$READ_LEN = 64*1024;
$MAX_BUF_LEN = $READ_LEN*1024;
$mode_plain=true;
$src=fopen("php://input","rb"); //test if OK!!!!
$magic_number=fread($src,2);
$input="";
  if(strlen($magic_number)==2)
    if(
      (ord($magic_number[0])==31)
    && (ord($magic_number[1])==139)
      )
    {
    $mode_plain=false;
    stream_filter_append($src, "gzip_header_filter8", STREAM_FILTER_READ);
    stream_filter_append($src, "zlib.inflate", STREAM_FILTER_READ);
    }
else
    {
    $input=$magic_number;
    }
/* read starts here*/
 $k = 0;
 while (!feof($src) && $k <= $MAX_BUF_LEN) {
   $inp = fread($src,$READ_LEN);
   $k += strlen($inp);
   $input.=$inp;
  }
echo $input;
fclose($src);
?>

I had a difficult time finding how to use compress.zlib with an http resource so I thought I would post what I found
<?php
$file = 'compress.zlib://http://www.example.com/myarchive.gz';
$fr = fopen($file, 'rb');
?>
Per the bugreport I found here (http://bugs.php.net/bug.php?id=29045)

This is the solution how to read stream from zip:
$fp = fopen('zip://foo.zip#bar.txt', 'r');
if( $fp ){
  while( !feof($fp) ){
    echo fread($fp, 8192);
  }
  fclose($fp);
}

@alvaro at demogracia dot com
well in fact that is wrong!
right code is:
<?php 
$fp = fopen('compress.zip://./foo.zip#bar.txt', 'r'); 
if( $fp ){ 
  while( !feof($fp) ){ 
    echo fread($fp, 8192); 
  } 
  fclose($fp); 
} 
?> 
as you might see you just have to add a "compress."
maybe when you posted this note is was right (2 years ago) but today its wrong... :/
sry for my english i am german :)