e.php

<form method="post">
	Jméno:<br>
	<input type="text" name="firstname"><br>
	Příjmení:<br>
	<input type="text" name="lastname"><br>
	Email:<br>
	<input type="email" name="email"><br>
	<input type="submit">
</form>

<?php

$firstname = $_POST["firstname"];
$lastname = $_POST["lastname"];
$email = $_POST["email"];

$toIntl = Array('ä'=>'a','Ä'=>'A','á'=>'a','Á'=>'A','à'=>'a','À'=>'A','ã'=>'a','Ã'=>'A','â'=>'a','Â'=>'A','č'=>'c','Č'=>'C','ć'=>'c','Ć'=>'C','ď'=>'d','Ď'=>'D','ě'=>'e','Ě'=>'E','é'=>'e','É'=>'E','ë'=>'e','Ë'=>'E','è'=>'e','È'=>'E','ê'=>'e','Ê'=>'E','í'=>'i','Í'=>'I','ï'=>'i','Ï'=>'I','ì'=>'i','Ì'=>'I','î'=>'i','Î'=>'I','ľ'=>'l','Ľ'=>'L','ĺ'=>'l','Ĺ'=>'L','ń'=>'n','Ń'=>'N','ň'=>'n','Ň'=>'N','ñ'=>'n','Ñ'=>'N','ó'=>'o','Ó'=>'O','ö'=>'o','Ö'=>'O','ô'=>'o','Ô'=>'O','ò'=>'o','Ò'=>'O','õ'=>'o','Õ'=>'O','ő'=>'o','Ő'=>'O','ř'=>'r','Ř'=>'R','ŕ'=>'r','Ŕ'=>'R','š'=>'s','Š'=>'S','ś'=>'s','Ś'=>'S','ť'=>'t','Ť'=>'T','ú'=>'u','Ú'=>'U','ů'=>'u','Ů'=>'U','ü'=>'u','Ü'=>'U','ù'=>'u','Ù'=>'U','ũ'=>'u','Ũ'=>'U','û'=>'u','Û'=>'U','ý'=>'y','Ý'=>'Y','ž'=>'z','Ž'=>'Z','ź'=>'z','Ź'=>'Z');

if (!empty($firstname) AND !empty($lastname) AND !empty($email)) {
	$first = strtolower(strtr($firstname, $toIntl));
	$last = strtolower(strtr($lastname, $toIntl));
	$fileName = $first.'-'.$last.'.jpg';

	$im = imagecreatetruecolor(300, 100);
	$text_color = imagecolorallocate($im, 233, 14, 91);
	imagestring($im, 1, 5, 5,  "$firstname $lastname", $text_color);
	imagestring($im, 1, 5, 25, $email, $text_color);
	imagejpeg($im, $fileName);
} else {
	echo "Musíte vyplnit všechna pole.";
}

?>