PHP | Imagick getImageUnits() Function

The Imagick::getImageUnits() function is an inbuilt function in PHP which is used to get the units of resolution of a particular image. 
Syntax:

int Imagick::getImageUnits( void )

Parameters: This function does not accepts any parameter.
Return Value: This function returns an integer of the image units of resolution.
Below programs illustrate the Imagick::getImageUnits() function in PHP: 
Program 1:
Original Image:

php

<?php

// PHP program to illustrate getimageunits function
$image = new Imagick(
'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-15.png');

// Use getImageUnits Function
$unit = $image->getImageUnits();

// Display the output
echo "</br>units = ";
print_r($unit);
?>

Output:

Units = 2

Program 2:

php

<?php
$string = "Computer Science portal for Geeks!";

// creating new image of above String
// and add color and background
$im = new Imagick();
$draw = new ImagickDraw();

// Fill the color in image
$draw->setFillColor(new ImagickPixel('green'));

// Set the text font size
$draw->setFontSize(50);

$metrix = $im->queryFontMetrics($draw, $string);
$draw->annotation(0, 40, $string);
$im->newImage($metrix['textWidth'], $metrix['textHeight'],
         new ImagickPixel('white'));

// Draw the image
$im->drawImage($draw);

// Imagick function to gets
// units of created image
$res= $im->getImageUnits();

// Display the units of image
echo "Units =  ";
print_r($res);
?>

Output:

Units = 0

Reference: http://php.net/manual/en/imagick.getimageunits.php