Imagick::setIteratorIndex

(PECL imagick 2, PECL imagick 3)

Imagick::setIteratorIndexSet the iterator position

Descrizione

public Imagick::setIteratorIndex(int $index): bool

Set the iterator to the position in the image list specified with the index parameter. Questo metodo è disponibile se Imagick è stato compilato con ImageMagick versione 6.2.9 o successive.

Elenco dei parametri

index

The position to set the iterator to

Valori restituiti

Restituisce true in caso di successo.

Esempi

Example #1 Using Imagick::setIteratorIndex():

Create images, set and get the iterator index

<?php
$im
= new Imagick();
$im->newImage(100, 100, new ImagickPixel("red"));
$im->newImage(100, 100, new ImagickPixel("green"));
$im->newImage(100, 100, new ImagickPixel("blue"));

$im->setIteratorIndex(1);
echo
$im->getIteratorIndex();
?>

Vedere anche:

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User Contributed Notes 1 note

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wilcobeekhuizen at gmail dot com
13 years ago
This function returns true on success but setting the iterator to an invalid index throws an exception instead of returning false:
Fatal error: Uncaught exception 'ImagickException' with message 'Unable to set iterator index'

This can happen when counting images inside a gif file, because the iterator count starts at zero and not one. If you count the number of images in a gif file be sure to use iterator 0 for the first image, like this:

<?php
$image
= new Imagick('simple.gif');
$image->setIteratorIndex(0);
?>
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