PHP | Gmagick getimageformat() Function

<?php 
// require_once('path/vendor/autoload.php');
 
// Create an Gmagick Object
$image = new Gmagick(
'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-15.png');
 
// Use getimageformat function to find the 
// formats of image
 
$res = $image->getimageformat();
 
// Display the format sequence of image
echo $res; 
?>

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

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

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

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

$im->setImageFormat('jpeg');

// Gmagick function to get format of created image
$res= $im->getimageformat();

// Display the format of image
echo $res;
?>