(PECL imagick 2, PECL imagick 3)
Imagick::nextImage — Moves to the next image
Associates the next image in the image list with an Imagick object.
此函数没有参数。
成功时返回 true。
The following function applies a callback to each image in an Imagick object.<?phpfunction imagickMap($callback, $im){ $im->setFirstIterator(); do { $callback($im); } while ( $im->nextImage() );}?>E.g. to convert a series of images to grayscale:<?phpimagickMap( function($im) { $im->setImageType(Imagick::IMGTYPE_GRAYSCALEMATTE); }, $im);?>Convert PDF to JPG page-wise:<?php$i = 0;$imagick = new Imagick();$imagick->readImage('myfile.pdf');while($imagick->hasNextImage()) { $imagick->writeImage(++$i.'-converted.jpg', false); $imagick->nextImage();}?>See also: http://php.net/manual/en/imagick.readimage.php