$im= imagecreatetruecolor(55, 30);
$red= imagecolorallocate($im, 255, 0, 0);
$black= imagecolorallocate($im, 0, 0, 0);
imagefilledrectangle($im, 4, 4, 50, 25, $red);
echo("Transparent image created and saved successfully.");
After running the program you will get the following output
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