Conversor de textos By 2Fac3R v4.0

<title> Conversor de textos By 2Fac3R v4.0</title>

<form action="" method="POST">
	<select name="convertir">
		<option value="bin2hex"> BinToHex </option>
		<option value="encode"> Encode </option>
		<option value="decode">	Decode </option>
		<option value="gzinflate"> gzinflate </option>
		<option value="utf-7"> Encode UTF-7</option>
		<option value="ASCII"> ASCII </option>
		<option value="MD5"> MD5 </option>
		<option value="SHA1"> SHA1 </option>
		<option value="Base64_encode"> Base64 encode</option>
		<option value="Base64_decode"> Base64 decode</option>
		<option value="bindec"> Binario To Decimal</option>	
		<option value="mcrypt">mcrypt</option>
	</select>
	<input type="text" name="str">
	<input type="submit" name="enviado" value="Convertir!">
	</form>
	
<?php
/*
 * Conversor de textos
 * .- Underc0de.org -.
 * 	   v4.0 2015
 * Autor: 2Fac3R
 * 
 * Gr33tz to:
 * 
 * xt3mp, arcangel_nigth, EddyW, ANTRAX, 11Sep, Kr34t0r, GAMARRA, SkippyCreammy, v1c0_h4ck, w4rning, Snifer, 
 * arthusu, Kodeinfect, [Q]3rV[0], WilyXem, m3x1c0h4ck, etc, etc...
 * 
 * */


function convertir($a, $string){ // a : eleccion, string:texto
	
	switch($a){
		case 'bin2hex':
			$res = bin2hex($string);
			break;
		case 'encode':
			$res = urlencode($string);
			break;
		case 'gzinflate':
			$res = gzinflate($string);
		case 'decode':
			$res = htmlentities(urldecode($string));
			break;
		case 'utf-7':
			$res = mb_convert_encoding($string,'UTF-7');
			break;
		case 'ASCII':
			for($i=0;$i<strlen($string);$i++){
				$obt=ord($string[$i]);
				$ascii=$obt.',';
			}
			$res = $ascii;
			break;
		case 'MD5':
			$res = md5($string);
			break;
		case 'SHA1':
			$res = sha1($string);
			break;
		case 'Base64_encode':
			$res = base64_encode($string);
			break;
		case 'Base64_decode':
			$res = base64_decode($string);
			break;
		case 'bindec':
			$res = bindec($string);
			break;
		case 'mcrypt':
			$res = crypt($string);
			break;
		default:
			die("Ha habido un error <a href=''> Regresar! </a>");
			break;
	}
	return $res;
}

if(!empty($_POST['enviado']) && isset($_POST['str']))
{
	echo '<b>Original:</b> '.htmlentities($_POST['str']).' </br></br>';
	echo '<textarea rows=4 cols=50>' .convertir($_POST['convertir'],$_POST['str']).'</textarea>';
}
	
?>