PHP | Imagick getPixelIterator() Function

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The Imagick::getPixelIterator() function is an inbuilt function in PHP which is used to return the image MagickPixelIterator.

Syntax:

ImagickPixelIterator Imagick::getPixelIterator( void )

Parameters:This function does not accept any parameter.

Return Value: This function returns an ImagickPixelIterator value.

Errors/Exceptions: This function throws ImagickException on error.

Below programs illustrate the Imagick::getPixelIterator() function in PHP:

Program 1:

<?php 
  
// Create a new imagick object 
$imagick = new Imagick( 
'https://media.zambiatek.com/wp-content/uploads/zambiatek-13.png'); 
  
$imageIterator = $imagick->getPixelIterator(); 
  
// Change the color of every second pixel to green 
foreach ($imageIterator as $row => $pixels) { 
    foreach ($pixels as $column => $pixel) { 
        if ($column % 2) { 
            $pixel->setColor("green"); 
        } 
    } 
    $imageIterator->syncIterator(); 
} 
  
// Display the output 
header("Content-Type:image/png"); 
echo $imagick; 
?> 

Output:

Program 2:

<?php 
   
// Create a new imagick object 
$imagick = new Imagick( 
'https://media.zambiatek.com/wp-content/uploads/zambiatek-13.png'); 
   
$imageIterator = $imagick->getPixelIterator(); 
   
// Change the color of every second pixel to green 
foreach ($imageIterator as $row => $pixels) { 
    foreach ($pixels as $column => $pixel) { 
        if ($row % 2) { 
            $pixel->setColor("blue"); 
        } 
    } 
    $imageIterator->syncIterator(); 
} 
   
// Display the output 
header("Content-Type:image/png"); 
echo $imagick; 
?> 