# readgzfile

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

readgzfile — Output a gz-file

### 说明

readgzfile(string `$filename`, bool `$use_include_path` = `false`): int|false

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`
  When set to `true` the include_path will be used to determine which file to open.

### 返回值

Returns the number of (uncompressed) bytes read from the file on success, 或者在失败时返回 `false`

### 错误／异常

失败时抛出 `E_WARNING` 警告。

### 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.

### 参见

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

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