PHP | ImagickPixelIterator getNextIteratorRow() Function

0 1 1 minute read

The ImagickPixelIterator::getNextIteratorRow() function is an inbuilt function in PHP which is used to get the next row as an array of pixel wands from the pixel iterator.

Syntax:

array ImagickPixelIterator::getNextIteratorRow( void )

Parameters:This function doesn’t accepts any parameter.

Return Value: This function returns an array value containing the ImagickPixel objects.

Below programs illustrate the ImagickPixelIterator::getNextIteratorRow() function in PHP:

Program 1:

<?php 
  
// Create a new imagick object 
$imagick = new Imagick(); 
  
// Create a image on imagick object 
// with 10x10 pixels 
$imagick->newImage(10, 10, 'black'); 
  
// Get the pixel iterator 
$imageIterator = $imagick->getPixelIterator(); 
  
// Rows counter variable 
$rows = 0; 
  
// Count the number of rows 
while ($pixels = $imageIterator->getNextIteratorRow()) { 
    $rows++; 
} 
  
echo 'The number of rows are ' . $rows; 
?> 

Output:

The number of rows are 10

Program 2:

<?php 
  
// Create a new imagick object 
$imagick = new Imagick(); 
  
// Create a image on imagick object 
$imagick->newImage(800, 250, 'black'); 
  
// Get the pixel iterator 
$imageIterator = $imagick->getPixelIterator(); 
  
while ($pixels = $imageIterator->getNextIteratorRow()) { 
    foreach ($pixels as $column => $pixel) { 
        if ($column % 20) { 
  
            // Paint every 20th pixel black in each row 
            $pixel->setColor("white"); 
        } 
    } 
  
    // Sync the iterator 
    $imageIterator->syncIterator(); 
} 
  
// Show the output 
$imagick->setImageFormat('png'); 
header("Content-Type: image/png"); 
echo $imagick->getImageBlob(); 
?> 

Output:

Reference: https://www.php.net/manual/en/imagickpixeliterator.getnextiteratorrow.php

Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, zambiatek Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!