PHP | ImagickPixelIterator __construct() function Last Updated : 02 Jan, 2020 Comments Improve Suggest changes Like Article Like Report The ImagickPixelIterator::__construct() function is an inbuilt function in PHP which is used create a instance of ImagickPixelIterator object. This object is used to iterate through the pixels. Syntax: bool ImagickPixelIterator::__construct( Imagick $wand ) Parameters:This function accepts a single parameter $wand which holds the image. Return Value: This function returns TRUE on success. Exceptions: This function throws ImagickException on error. Below given programs illustrate the ImagickPixelIterator::__construct() function in PHP: Program 1: php <?php // Create a new imagick object $imagick = new Imagick(); // Create a image on imagick object $imagick->newImage(800, 250, 'black'); // Create a new imagickPixelIterator object $imageIterator = new ImagickPixelIterator($imagick); // Loop through pixel rows foreach ($imageIterator as $row => $pixels) { foreach ($pixels as $column => $pixel) { // Set the color of each pixel to blue $pixel->setColor('blue'); } // Sync the iterator after each iteration $imageIterator->syncIterator(); } // Show the output $imagick->setImageFormat('png'); header("Content-Type: image/png"); echo $imagick->getImageBlob(); ?> Output: Program 2: php <?php // Create a new imagick object $imagick = new Imagick( 'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-13.png'); // Create a new imagickPixelIterator object $imageIterator = new ImagickPixelIterator($imagick); $i = 0; // Loop through pixel rows foreach ($imageIterator as $row => $pixels) { foreach ($pixels as $column => $pixel) { $i++; } // Sync the iterator after each iteration $imageIterator->syncIterator(); } echo 'Total number of pixels: ' . $i; ?> Output: Total number of pixels: 122728 Reference: https://www.php.net/manual/en/imagickpixeliterator.construct.php Comment More info G gurrrung Follow Improve Article Tags : Web Technologies PHP PHP-function PHP-Imagick Explore PHP Tutorial 8 min read BasicsPHP Syntax 4 min read PHP Variables 5 min read PHP | Functions 8 min read PHP Loops 4 min read ArrayPHP Arrays 5 min read PHP Associative Arrays 4 min read Multidimensional arrays in PHP 5 min read Sorting Arrays in PHP 4 min read OOPs & InterfacesPHP Classes 2 min read PHP | Constructors and Destructors 5 min read PHP Access Modifiers 4 min read Multiple Inheritance in PHP 4 min read MySQL DatabasePHP | MySQL Database Introduction 4 min read PHP Database connection 2 min read PHP | MySQL ( Creating Database ) 3 min read PHP | MySQL ( Creating Table ) 3 min read PHP AdvancePHP Superglobals 6 min read PHP | Regular Expressions 12 min read PHP Form Handling 4 min read PHP File Handling 4 min read PHP | Uploading File 3 min read PHP Cookies 9 min read PHP | Sessions 7 min read Like