Description:
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There is an syntax error in Example 966. imap_fetch_overview()

<?php
// Fetch an overview for all messages in INBOX
$result = imap_fetch_overview($mbox,"1:{$MC->Nmsgs}",0);
foreach ($result => $overview) {
   echo "#{$overview->msgno} ({$overview->date}) - From: {$overview->from}
   {$overview->subject}\n";
}
?>

foreach ($result => $overview) should be: 
foreach ($result as $overview)