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Imagick::setFirstIterator

(PECL imagick 2, PECL imagick 3)

Imagick::setFirstIteratorSets the Imagick iterator to the first image

Description

public Imagick::setFirstIterator ( ) : bool

Sets the Imagick iterator to the first image.

Return Values

Returns true on success.

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simonjjarrett at gmail dot com
11 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
);
?>
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