Writes an image to the specified filename

# Gmagick::writeimage

(PECL gmagick >= Unknown)

Gmagick::writeimage — Writes an image to the specified filename

### 说明

public function Gmagick::writeimage(string `$filename`, bool `$all_frames` = `false`): Gmagick

Writes an image to the specified filename. If the filename parameter is `null`, the image is written to the filename set by Gmagick::readimage() or Gmagick::setimagefilename().

### 参数

`filename`
  The image filename.

### 返回值

The Gmagick object.

### 错误／异常

错误时抛出 GmagickException。

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