(PECL imagick 2 >= 2.3.0, PECL imagick 3)
Imagick::writeImage — Writes an image to the specified filename
$filename
= NULL): boolWrites 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().
filename
Filename where to write the image. The extension of the filename defines the type of the file. Format can be forced regardless of file extension using format: prefix, for example "jpg:test.png".
Returns true
on success.