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 // Create a new imagick object $imagick = new Imagick( // Add a new image to same object, this // will automatically move index to new // image which is added. $imagick->addImage(new Imagick( 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 // Create a new imagick object $imagick = new Imagick(); // Array of images $images = [ ]; // 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
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