The Imagick::mergeImageLayers() function is an inbuilt function in PHP which is used to merge image layers into one.
Syntax:
Imagick Imagick::mergeImageLayers( int $layer_method )
Parameters: This function accepts a single parameter $layer_method which holds an integer value corresponding to one of LAYERMETHOD constants. You can also pass the constants directly like mergeImageLayers(Imagick::LAYERMETHOD_COMPAREANY).
List of LAYERMETHOD constants are given below:
- imagick::LAYERMETHOD_UNDEFINED (0)
- imagick::LAYERMETHOD_COALESCE (1)
- imagick::LAYERMETHOD_COMPAREANY (2)
- imagick::LAYERMETHOD_COMPARECLEAR (3)
- imagick::LAYERMETHOD_COMPAREOVERLAY (4)
- imagick::LAYERMETHOD_DISPOSE (5)
- imagick::LAYERMETHOD_OPTIMIZE (6)
- imagick::LAYERMETHOD_OPTIMIZEPLUS (7)
- imagick::LAYERMETHOD_OPTIMIZEIMAGE (8)
- imagick::LAYERMETHOD_OPTIMIZETRANS (9)
- imagick::LAYERMETHOD_REMOVEDUPS (10)
- imagick::LAYERMETHOD_REMOVEZERO (11)
- imagick::LAYERMETHOD_COMPOSITE (12)
- imagick::LAYERMETHOD_MERGE (13)
- imagick::LAYERMETHOD_FLATTEN (14)
- imagick::LAYERMETHOD_MOSAIC (15)
Return Value: This function returns an Imagick object containing the new image.
Exceptions: This function throws ImagickException on error.
Below programs illustrate the Imagick::mergeImageLayers() function in PHP:
Program 1:
<?php   // Create a new Imagick object $imagick = new Imagick(   // Add another image in the same object $imagick->addImage(new Imagick(   // Set the Opacity $imagick->setImageOpacity(0.5);   // Merge the Layers $result = $imagick->mergeImageLayers(Imagick::LAYERMETHOD_FLATTEN);   // Display the image header("Content-Type: image/png"); echo $result->getImageBlob(); ?> |
Output:
Program 2:
<?php   // Create a new Imagick object $imagick = new Imagick(   // Add another image in the same object $imagick->addImage(new Imagick(   // Set the Opacity $imagick->setImageOpacity(0.7);   // Merge the Layers $result = $imagick->mergeImageLayers(11);   // Display the image header("Content-Type: image/png"); echo $result->getImageBlob(); ?> |
Output:
Reference: https://www.php.net/manual/en/imagick.mergeimagelayers.php
