PHP | Imagick setImageIterations() Function

PHP | Imagick setFirstIterator() function

Last Updated : 17 Dec, 2019

The Imagick::setFirstIterator() function is an inbuilt function in PHP which is used to set the Imagick iterator to the first image. Syntax:

bool Imagick::setFirstIterator( void )

Parameters: This function doesn’t accept any parameter. Return Value: This function returns TRUE on success. Exceptions: This function throws ImagickException on error. Below given programs illustrate the Imagick::setFirstIterator() function in PHP: Program 1:

php

<?php
 
// Create a new imagick object
$imagick = new Imagick(
'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-9.png');
 
// Add a new image to same object, this
// will automatically move index to new
// image which is added.
$imagick->addImage(new Imagick(
'https://media.geeksforgeeks.org/wp-content/uploads/20190918234528/colorize1.png'));
 
echo 'Index before setFirstIterator(); is '
    . $imagick->getIteratorIndex() 
    .'<br>';
 
// Set the Imagick iterator to the first image
$imagick->setFirstIterator();
 
echo 'Index after setFirstIterator(); is ' 
    . $imagick->getIteratorIndex() 
    .'<br>';
?>

Output:

Index before setFirstIterator(); is 1
Index after setFirstIterator(); is 0

Program 2:

php

<?php
// Create a new imagick object
$imagick = new Imagick();
 
// Array of images
$images = [
'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-13.png',
'https://media.geeksforgeeks.org/wp-content/uploads/20190918234528/colorize1.png',
'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-13.png'
];
 
// Read the images
$imagick->readImages($images);

echo 'Index before setFirstIterator(); is ' 
    . $imagick->getIteratorIndex() 
    . '<br>';

// Set the Imagick iterator to the first image
$imagick->setFirstIterator();

echo 'Index after setFirstIterator(); is ' 
    . $imagick->getIteratorIndex() 
    . '<br>';
?>

Output:

Index before setFirstIterator(); is 2
Index after setFirstIterator(); is 0

Reference: https://www.php.net/manual/en/imagick.setfirstiterator.php

PHP | Imagick setImageIterations() Function

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