Description:
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---
From manual page: http://www.php.net/imagick.getimagegeometry
---
sample script in getimagegeometry doesn't include that function

"function getImageGeometry($imagePath) {
    $imagick = new \Imagick(realpath($imagePath));
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}" this is the sample. 

Yu can use 

function getImageGeometry($imagePath) {
    $imagick = new \Imagick(realpath($imagePath));
    return $imagick->getImageGeometry();
} 

as example