Validate emails in array using foreach

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How do I validate an array of emails from a textbox before sending them to the wp_mail() function? 

$emails = 'test@test.com;test2@test2.com
email3@email3.com,email4@email4.com, email5.com';

$emails = preg_split('/[;,n]/', $emails);
$validEmails = array();
$subject = 'Hey Subject';
$message = 'I am a message';

foreach($emails as $key=>$value){
  if (is_email($value)) {
    array_push($validEmails, $value);
  }
}

wp_mail($validEmails, $subject, $message, $headers);

The sample code above stops on the if (is_email()) condition. How can I validate each email in the array whichever way before sending to the mail function?

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1 comment

  1. Are you aware you can pass a comma-separated string of email adresses to wp_mail?

    // Make sure your email strings only uses comma as a separator
$emails = preg_replace('~[,;s]+~', ',', $emails);

    Then just throw that string into wp_mail’s first argument. Depending on exactly what you want to do with the emails, this approach may be sufficient.

    The wp_mail function internally relies on the PHPMailer library (unless you use a redefined wp_mail function). PHPMailer validates the email before adding it to the recipient list. Invalid emails will be skipped.