# readgzfile

(PHP 4, PHP 5, PHP 7)

readgzfile — Output a gz-file

### 说明

readgzfile ( string `$filename` [, int `$use_include_path` = 0 ] ) : int

Reads a file, decompresses it and writes it to standard output.

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

### 参数

`filename`

  The file name. This file will be opened from the filesystem and its contents written to standard output.

`use_include_path`

  You can set this optional parameter to 1, if you want to search for the file in the include_path too.

### 返回值

Returns the number of (uncompressed) bytes read from the file. If an error occurs, `FALSE` is returned and unless the function was called as @readgzfile, an error message is printed.

### 参见

- gzpassthru() - Output all remaining data on a gz-file pointer
- gzfile() - Read entire gz-file into an array
- gzopen() - Open gz-file