problema array

$sql = mysql_query("SELECT * FROM spam_aristotele") or die (mysql_error());

while($row = mysql_fetch_array($sql)){

$p1 = explode(' ', $row['keyword']);
 
 var_dump($p1);
}

$sql = mysql_query("SELECT * FROM spam_aristotele") or die (mysql_error());

$array_textarea = explode(' ', $parolechiave);
$p1 = array();	

while($row = mysql_fetch_array($sql)){
	
	$p1[] = $row['keyword'];
	
}
	
 var_dump($array_textarea);

 var_dump($p1);

  if(in_array($array_textarea, $p1))
   {
       echo "spam";
   }

$sql = mysql_query("SELECT * FROM spam_aristotele") or die (mysql_error());


	$array_textarea = explode(' ', $parolechiave);
	$p1 = array();	

	while($row = mysql_fetch_array($sql))
	{
	
		$p1[] = $row['keyword']."";
	
	}
   
   if(array_intersect($array_textarea, $p1))
	{
		echo "Non si accettano siti spam.<br><br>\n";	
	}

$array_textarea = explode(' ', strtolower($parolechiave));