# gzopen

(PHP 4, PHP 5, PHP 7, PHP 8)

gzopen — Open gz-file

### 说明

gzopen(string `$filename`, string `$mode`, bool `$use_include_path` = `false`): resource|false

Opens a gzip (.gz) file for reading or writing.

gzopen() can be used to read a file which is not in gzip format; in this case gzread() will directly read from the file without decompression.

### 参数

`filename`

  The file name.

`mode`

  As in fopen() (`rb` or `wb`) but can also include a compression level (`wb9`) or a strategy: `f` for filtered data as in `wb6f`, `h` for `Huffman only compression` as in `wb1h`. (See the description of `deflateInit2` in zlib.h for more information about the strategy parameter.)

`use_include_path`
  If set to `true`, files in the include_path are searched for too.

### 返回值

Returns a file pointer to the file opened, after that, everything you read from this file descriptor will be transparently decompressed and what you write gets compressed.

If the open fails, the function returns `false`.

### 更新日志

版本 | 说明
--- | ---
8.5.0 | `use_include_path` is now of type bool. Previously, it was of type int.

### 示例

示例 #1 gzopen() Example

`<?php
$fp = gzopen("/tmp/file.gz", "r");
?>`

### 参见

- gzclose() - Close an open gz-file pointer

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