How to filter email and phone number in comments

Hi

Can any one help me hoe can we filter email & phone number in comments i have given

this code in _validate()

$s1 = $form_state['values']['comment'];
	$Phone_Pattern = "/(\d)?(\s|-)?(\()?(\d){3}(\))?(\s|-){1}(\d){3}(\s|-){1}(\d){4}/";
	$Email_Pattern = "|^[a-zA-Z0-9._-]+@[a-zA-Z0-9-]+\.[a-zA-Z.]{2,5}$|";
	$tendigit = "/([\d]{10})/";
	$lines = spliti("\n", $s1);
	$email_stripped_content = '';
	$phone_stripped_content1 = '';
	$phone_stripped_content2 = '';
	$email_flag = '';
	$phone_flag1 = '';
	$phone_flag2 = '';
	$str_content = '';
	$set_error = '';
	//srtip email addresses
	$cont = '';
	foreach($lines as $line)
	{
	$str_content = '';
	$words = spliti(" ",$line);
	if($words){
			
			foreach($words as $word){
			       $email_flag = "";
				   $phone_flag = "";
				   $phone_flag2 = "";
					if (!preg_match_all($Email_Pattern, $word, $matches)) {
					//$email_stripped_content = " ".$word;
					}
					else
					{
					$email_flag = "yes";
					$set_error = "yes";
					}
					
					if (!preg_match_all($Phone_Pattern, $word, $matches) && $email_flag != 'yes') {
					//$email_stripped_content = " ".$word;
					}
					else
					{
					$phone_flag = "yes";
					$set_error = "yes";
					}
					
					if (!preg_match_all($tendigit, $word, $matches) && $email_flag != 'yes') {
					//$email_stripped_content = " ".$word;
					}
					else
					{
					$phone_flag2 = "yes";
					$set_error = "yes";
					}
					
					if($email_flag == '' && $phone_flag == '' && $phone_flag2 == '')
					{
					$str_content .= " ".$word;
					}
			}
			//end - for each
			
		}
		// end - if
		$cont .= $str_content;
	}	
	drupal_set_message($cont);
	//end - main - for - each	
	$form_state['values']['comment'] =  $cont;

no use

Please any one help

is there any function or module for comment filter