มี 2 คำถามอยากให้ช่วยหน่อยค่ะ คำถามที่ 1น้องมีอีเมล์ที่เก็บใน notepad เป็นรายชื่ออีเมล์ประมาณ 20 เมล์ค่ะ

<?php
	$_d = '_file3';
	$_f = '_file3.txt';
	define('PREFIX','tb');
	$_em = array(
		1 => " [email protected] \n ",
		2 => ' [email protected] '
	);
	//////////  //////
	if(! opendir($_d)) mkdir($_d, '0775');
	if(! file_exists($_d.'/'.$_f)) touch($_d.'/'.$_f);
	// $_fp = fopen($_d.'/'.$_f, 'wb'); fwrite($_fp, serialize($_em)); fclose($_fp);
	$_fp = fopen($_d.'/'.$_f, 'wb');
	foreach($_em as $_val){
		fwrite($_fp, $_val); 
	} fclose($_fp); // End.

	/////////  ///////

	$_file = file($_d.'/'.$_f);
	$_db = mysql_connect($_s, $_u, $_p);
	foreach($_file as $_val){
	
		$_query = mysql_db_query($_db, 'INSERT INTO '.PREFIX.'_email(id, email) VALUES(NULL, \''.$_val.'\')'); // PHP v4 ,PHP v5 not 5.3, 6
		mysql_free_result($_query); // return free result
	} // End.
	mysql_close($_db);

	// ////////////////////////
	// mail 
	
	$_query = mysql_query($_db,'SELECT email FROM '.PREFIX.'_email ');
	$_email = array();
	while($_result = mysql_fetch_assoc($_query)){
			
			$_email = $_result['email'];
	}
	// bool mail  (  string $to  ,  string $subject  ,  string $message  [,  string $additional_headers  [,  string $additional_parameters  ]] )
	$_err = ' ';
	foreach($_email as $_key=> $_val){
		if(! mail($_val  , $_subject  ,  $_message ,$_headers)) $_err .= ' Sent error ! ! '.($_key+1).' : '.$_val .'<br>';	
	}
?>
<div id = "_get_error"><?= $_err; ?></div>