Mine

$image_attr = getimagesize($file);
$squarepic = imagecreatetruecolor(140, 140);
@ imagecopyresampled($squarepic, $image, -($image_attr[0]/2) + 70, -($image_attr[1]/2) + 70, 0, 0, 140, 140, $image_attr[0], $image_attr[1]);