(PECL imagick 0.9.0-0.9.9)
Imagick::writeImage — Writes an image to the specified filename
本函数暂无文档，仅有参数列表。
Writes an image to the specified filename. If the filename parameter is NULL, the image is written to the filename set by Imagick::ReadImage() or Imagick::SetImageFilename().
Returns TRUE on success.