i am trying to write a script that will send out an email to all the email addresses stored in a mysql db when the site has been updated. the code i have so far is as follows

$sql= "INSERT INTO $table (date, title, article) VALUES ('$a', '$b', '$c')";

if (!mysql_query($sql,$con))
  die('Error: ' . mysql_error());
  $lastid = mysql_insert_id();
  $message .= '<body leftmargin="0" topmargin="0">
	<table width="700" border="0" align="center" cellpadding="0" cellspacing="5">
		<td>The ' . $table . ' section of the <a href="piponline.info"> PiPonline website</a> has been updated.  Please follow the link to see the new content.

	$query = "SELECT email FROM emails";
	$result = mysql_query($query) or die(mysql_error());

	while($row = mysql_fetch_array($result)){
	$contactemail = $row['email']. ", ";

	// Contacts
	//$replyName = $merc_replyId;
	//$replyEmail = $merc_replyAddress;
	$replyName = "PiPonliine";
	$replyEmail = "info@piponline.info";

	$contactname = "";

	// Subject
	$subject = "Website Update";

	// Headers
	$headers = "MIME-Version: 1.0" . PHP_EOL;
	$headers .= "Content-type: text/html; charset=iso-8859-1" . PHP_EOL;
	$headers .= "From: ".$replyName." <".$replyEmail.">\r\n" . PHP_EOL;
	$headers .= "BCC: ".$contactname." <".$contactemail.">\r\n" . PHP_EOL;

	mail(implode(',', $contactemail), $subject, $message, $headers);
  echo "$contactemail";
  echo "<h2>Email notification sent</h2>";
  echo "<h2>1 record added</h2>";


this code is giving me the following error message which as far as i know means that array is not being populated.

Warning: implode(): Bad arguments

due to the error the emails are not being sent even if the code for that section is correct or not.

i have changed the code slightly now and have got it sending out one email. i have narrowed the problem down to the mysql query as this is not populating the array it is only putting on email address in.

here is the code for the mysql statement

$query = "SELECT email FROM emails";
	$result = mysql_query($query) or die(mysql_error());

	while($row = mysql_fetch_array($result)) {
	$contactemail = $row[0]. ", ";

If you have a long number of mails in your db, then it is better to use sleep function to avoid overload of server....
Read more about this on gooogle.....

the sleep function pauses the mysql statement. i cannot see how that would solve the problem of my array not being populated.