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  1. Table: cquestions -> cqid, cqtext, showdate. I want to update 'showdate' field to tomorrows date.. cqid cqtext showdate 200 q1 2013-05-22 201 q2 0000-00-00 202 q3 0000-00-00 the idea is to display only one question everyday. showdate is compared with the current date and display the first question q1. the starting date only store in db. now i want to update only the next row (q2)'s showdate to tomorrows date. next day wen q2 is displayed q3 will be updated to tomorrows date. today q1 displayed. db is like this. cqid cqtext showdate 200 q1 2013-05-22 201 q2 2013-05-23 202 q3 0000-00-00 tomorrow q2 displayed. then db cqid cqtext showdate 200 q1 2013-05-22 201 q2 2013-05-23 202 q3 2013-05-24 203 q4 0000-00-00 my code: $today=date("Y/m/d"); $tomorrow= date("Y-m-d", strtotime("tomorrow")); echo "<form method='post' id='submit' action='checkresult.php'>"; $sql="SELECT * FROM cquestions where showdate= '$today' limit 1"; $result=mysql_query($sql); while ($row = mysql_fetch_array($result)) { $cqid=mysql_result($result,"cqid"); $update1="update cquestions set showdate='$tomorrow' where showdate='0000-00-00' and cqid!='$cqid' order by cqid limit 1"; mysql_query($update1); echo "<p>" . $row['cqtext'] . "</p>"; $sql2="SELECT * FROM canswers where cqid=".$row['cqid']; $result2=mysql_query($sql2); while($row2=mysql_fetch_assoc($result2)){ echo "<input type='radio' name='".$row['cqid']."' value='".$row2['cqans']."' />".$row2['aatext']; } /*echo "<input type='hidden' name='email' value='email' />";*/ } echo"<input type='submit' id='submit' name='submit' value='Submit Answers' />"; echo "</form>"; ?> this code update the next row, but the problem is its executed every time page loads and update the next row... i want to execute the update query only once for the day. how to do it?
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