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816Part VCase StudiesListing 43-16(continued) $query2 = SELECT date FROM mylog WHERE ID = $prev_ID ; $result2 = mysql_query($query2); $prevdate_row = mysql_fetch_array($result2); $prev_date = $prevdate_row[0]; } else { $prev_date = ; } // Get next date for Cases 2 and 3if ($entry_ID != $last_ID) { $next_ID = $entry_ID + 1; $query3 = SELECT date FROM mylog WHERE ID = $next_ID ; $result3 = mysql_query($query3); $nextdate_row = mysql_fetch_array($result3); $next_date = $nextdate_row[0]; } else { $next_date = ; } // Assemble the Previous/Next links// Case 2if ($next_date != && $prev_date != ) { $flipbar = n

<– Previous

Next –>

n ; } // Case 3elseif ($next_date != && $prev_date == ) { $flipbar = n

Next –>

n ; } // Case 4elseif($next_date == && $prev_date != ) { $flipbar = n

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n ; } // ——————— // NOW ASSEMBLE THE PAGE// ———————
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