มีปัญหาอยากจะถามหน่อยครับ เกี่ยวกับโปรแกรมการตัดคำ

<form action="index2.php" method="post" name="form1" id="form1">
 	Insert Text : <br />
 <textarea name="text" rows="5" id="text" style="width:100%"></textarea><br />
  <input type="submit" name="Submit" id="Submit" value="Submit" />&nbsp;&nbsp; &nbsp; &nbsp;  <input type="Reset" name="Reset" id="Reset" value="Reset" /><br /><hr />
</form>

<?php
if($_POST["text"]!= ""){
	function swath($input_text){
		$input_filename= "test.txt";
		$output_filename= "output.txt";
		$input_text = iconv('UTF-8', 'TIS-620', trim($input_text));
		file_put_contents($input_filename, $input_text);
		system( SWATH .'/swath.exe -b "&nbsp" -d ' . SWATH . '/swath -m long < ' . $input_filename . ' > ' . $output_filename); 
		$raw = file_get_contents($output_filename);
		$raw = iconv('TIS-620', 'UTF-8', rtrim($raw));
		unlink($input_filename);
		unlink($output_filename);
		return $raw;
	}//END FUNC SWATH
        function multiexplode ($delimiters,$string) {
		$ready = str_replace($delimiters, $delimiters[0], $string);
		$launch = explode($delimiters[0], $ready);
		return  $launch;
	}
        $trim = str_replace( " ", "",  ($_POST["text"]) );
        $w = swath ($trim);  
        $ex = multiexplode(array("&nbsp"),$w);
 
        }

Code (PHP)
[php]<?php
if($_POST["q"]!=""){
	//echo $_POST["q"];
	echo $_POST["q"] ."<hr / >";
	$q = trim( $_POST["q"] );
	if( ord ( $q ) > "160" and ord ( $q ) < "250"){
	  $url = "http://th.asianwordnet.org/services/dictionary/xml/th2en/".urlencode($q);
	}else{
	  $url = "http://th.asianwordnet.org/services/dictionary/xml/en2th/".$q;
	}		
	$page = file_get_contents($url);
	$xml = simplexml_load_string($page);
	$str = "";

	if($xml->rows > 0){
		foreach($xml->data->item as $key => $item){
			if($item->words != ""){
				if( $item->ss_type == "n" ){
					$str .= $item->words;
					$str .= ", ";
					if($item->translate){
						$str .= $item->translate;
						$str .= ", ";
					}//END IF
				}//END IF
				else{
					echo "ไม่ใช่คำนาม" ."<br />";
				}
			}//END IF
		}//END foreach
	}//END IF
	

	function multiexplode ($delimiters,$string) {
		$ready = str_replace($delimiters, $delimiters[0], $string);
		$launch = explode($delimiters[0], $ready);
		return  $launch;
	}	
	$ex = multiexplode(array( " ", "," ),$str);
	$stack = array( );	
	for($b=0; $b <= count($ex); $b++){
	   if( $ex[$b] != "" ){
			array_push( $stack, $ex[$b]);
	   }
	}
	
	
	
	
	
	echo "<pre>";
	print_r($stack);
	echo "</pre><hr>";
	foreach ($stack as $value) {
		$link = "http://th.wikipedia.org/wiki/".$value;
		echo "<a href=".$link.">". $value ."</a><br>";
	}

	
}//END IF
?>