How to get a Web POST variable into an array using PHP

Using PHP 4.3.2 I'm wanting to validate email addresses that are entered into a form. There may be one or more adrresses but multiples will be separated by commas ','.
i.e - dbn@acme.com,sam@acme.com
The following code does not work. Any ideas?
Also how to trim spaces out of the entry in case of:
i.e - dbn@acme.com, sam@acme.com

$emails = array($_POST['EmailRecipients']);
for ($i = 0; $i < count($emails); $i++) {
      if (!eregi ("^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$", $emails[i])) {
            ReportAdminError("Email is incorrect - $emails[i]",'Error','report_template');
            exit;
      }
}

Thanks in advance,
David

Start Free Trial