gistfile1.php

<?php 
class ascii
{
	function decode($str) { 
		preg_match_all("/(\d{2,5})/", $str,$a);
		$a = $a[0];
		foreach ($a as $dec){
			if ($dec < 128) { 
				$utf .= chr($dec); 
			} else if ($dec < 2048) { 
				$utf .= chr(192 + (($dec - ($dec % 64)) / 64)); 
				$utf .= chr(128 + ($dec % 64)); 
			} else { 
				$utf .= chr(224 + (($dec - ($dec % 4096)) / 4096)); 
				$utf .= chr(128 + ((($dec % 4096) - ($dec % 64)) / 64)); 
				$utf .= chr(128 + ($dec % 64)); 
			} 
		}
		return $utf;
	} 
	
	function encode($c){
		$len = strlen($c);
		$a = 0;
		while ($a < $len){
			$ud = 0;
			if (ord($c{$a})>=0 && ord($c{$a})<=127){
				$ud = ord($c{$a});
				$a += 1;
			}else if (ord($c{$a})>=192 && ord($c{$a})<=223){
				$ud = (ord($c{$a})-192)*64 + (ord($c{$a+1})-128);
				$a += 2;
			}else if (ord($c{$a})>=224 && ord($c{$a})<=239){
				$ud = (ord($c{$a})-224)*4096 + (ord($c{$a+1})-128)*64 + (ord($c{$a+2})-128);
				$a += 3;
			}else if (ord($c{$a})>=240 && ord($c{$a})<=247){
				$ud = (ord($c{$a})-240)*262144 + (ord($c{$a+1})-128)*4096 + (ord($c{$a+2})-128)*64 + (ord($c{$a+3})-128);
				$a += 4;
			}else if (ord($c{$a})>=248 && ord($c{$a})<=251){
				$ud = (ord($c{$a})-248)*16777216 + (ord($c{$a+1})-128)*262144 + (ord($c{$a+2})-128)*4096 + (ord($c{$a+3})-128)*64 + (ord($c{$a+4})-128);
				$a += 5;
			}else if (ord($c{$a})>=252 && ord($c{$a})<=253){
				$ud = (ord($c{$a})-252)*1073741824 + (ord($c{$a+1})-128)*16777216 + (ord($c{$a+2})-128)*262144 + (ord($c{$a+3})-128)*4096 + (ord($c{$a+4})-128)*64 + (ord($c{$a+5})-128);
				$a += 6;
			}else if (ord($c{$a})>=254 && ord($c{$a})<=255){ //error
				$ud = false;
			}
			$scill .= "&#$ud;";
		}
		return $scill;
	}
}


header("Content-Type: text/html; charset=UTF-8"); 

if($_POST['str']){
	$str = $_POST['str'];
}else {
$str ='中文：春节愉快！
港台：春節愉快！
英文：Happy Spring Festival!
韩国语：봄 축제는 행복하다!
日文：スプリング・フェスティバルは幸せである!
荷兰：Gelukkige Festival van de Lente!
德语：Glückliches Frühling Festival!
法语：Festival Heureux De Ressort !
希腊语：Το φεστιβάλ άνοιξη είναι ευτυχές!
意大利：Festival Felice Della Molla!
俄语：Счастливое Празднество Весны!
葡萄牙(巴西)：O Festival da mola é feliz!
阿拉伯语：نابض مهرجان سعيدة!
西班牙语：El festival del resorte es feliz!
';
}
//echo '<pre>';
//$str= ascii::encode($str);
//echo $str;//."<br />";
//$str = ascii::decode($str);
//echo $str."<br />";
$str= ascii::encode($str);
echo str_replace(array("&#13;","&#10;"), array("<br />","\n"), $str); 
?>
<form action="" method="post" name="form1" target="_self" id="form1">
<?php
echo ascii::encode('这是个完美的acsii转换类，此转换类不同于一般的依靠对照表来完成。acsii包含所有不同语言的字符集，请输入各国语言试试：(多国翻译：http://www.mutouyu.com/translation/)');
?>
  <div align="center">
    <textarea name="str" cols="100" rows="10"></textarea>
  <br />
  <input type="submit" name="Submit" value="submit" />
 </div>
</form>