[edit] Last updated: Fri, 17 May 2013

Imagick::setIteratorIndex

(PECL imagick 2.0.0)

Imagick::setIteratorIndex — Set the iterator position

Descrizione

bool Imagick::setIteratorIndex ( int $index )

Set the iterator to the position in the image list specified with the index parameter. This method is available if Imagick has been compiled against ImageMagick version 6.2.9 or newer.

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:

Imagick::getIteratorIndex() - Gets the index of the current active image
Imagick::getImageIndex() - Gets the index of the current active image
Imagick::setImageIndex() - Set the iterator position

add a note User Contributed Notes Imagick::setIteratorIndex - [1 notes]

down

wilcobeekhuizen at gmail dot com ¶

2 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);


?>

add a note