Imagick::nextImage

(PECL imagick 2, PECL imagick 3)

Imagick::nextImage — Moves to the next image

Description

public Imagick::nextImage(): bool

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

Parameters

This function has no parameters.

Return Values

Returns true on success.

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User Contributed Notes 2 notes

down

simonjjarrett at gmail dot com ¶

5 years 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
);
?>

down

-2

markus dot s dot schmitz at gmail dot com ¶

12 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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