Imagick::nextImage

(PECL imagick 2.0.0)

Imagick::nextImageMoves to the next image

Description

Imagick::nextImage ( void ) : bool

Associates the next image in the image list with an Imagick object.

Return Values

Returns TRUE on success.

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User Contributed Notes 2 notes

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2
simonjjarrett at gmail dot com
7 months ago
The following function applies a callback to each image in an Imagick object.

<?php
function imagickMap($callback, $im)
{
   
$im->setFirstIterator();

    do
    {
       
$callback($im);
    }
    while (
$im->nextImage() );
}
?>

E.g. to convert a series of images to grayscale:

<?php
imagickMap
(
    function(
$im)
    {
       
$im->setImageType(Imagick::IMGTYPE_GRAYSCALEMATTE);
    },
   
$im
);
?>
up
-2
markus dot s dot schmitz at gmail dot com
7 years ago
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
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