谁能告诉我为什么下面代码的网页上没有显示更新链接？（“更新”链接）
{
echo ('You did not complete all of the required fields');
echo "<BR>";
while($rows=mysql_fetch_array($result)){
echo '<a href="update.php?Reference='. $rows['Reference'].' ">update</a>';
}
} // end of while loop
else {
echo "Successful";
echo "<BR>";
echo "<a href='list_records.php'>View result</a>";
}
更新 2
<?php
require_once('auth.php');
$host="xxx"; // Host name
$username="xxx"; // Mysql username
$password="xxx"; // Mysql password
$db_name="xxx"; // Database name
$tbl_name="xxx"; // Table name
// Connect to server and select database.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
$Reference=$_REQUEST['Reference'];
$directly = $_REQUEST['directly'];
$behalfclient = $_REQUEST['behalfclient'];
$investigations = $_REQUEST['investigations'];
$injuries = $_REQUEST['injuries'];
$duties = $_REQUEST['duties'];
$Wherepain = $_REQUEST['Wherepain'];
$pain = $_REQUEST['pain'];
$aggravates = $_REQUEST['aggravates'];
$eases = $_REQUEST['eases'];
$Movement = $_REQUEST['Movement'];
$neural = $_REQUEST['neural'];
$UnderstandNPRS = $_REQUEST['UnderstandNPRS'];
$NPRSassessment = $_REQUEST['NPRSassessment'];
$yourhobbies = $_REQUEST['yourhobbies'];
$hobbiesaffected = $_REQUEST['hobbiesaffected'];
$social = $_REQUEST['social'];
$activities = $_REQUEST['activities'];
$lifestyle = $_REQUEST['lifestyle'];
$avoiddriving = $_REQUEST['avoiddriving'];
$grip = $_REQUEST['grip'];
$flashbacks = $_REQUEST['flashbacks'];
$braking = $_REQUEST['braking'];
$past = $_REQUEST['past'];
$psychologically = $_REQUEST['psychologically'];
$stomach = $_REQUEST['stomach'];
$dental = $_REQUEST['dental'];
$organs = $_REQUEST['organs'];
$genitals = $_REQUEST['genitals'];
$memory = $_REQUEST['memory'];
$scaring = $_REQUEST['scaring'];
$deformity = $_REQUEST['deformity'];
$eyes = $_REQUEST['eyes'];
$burns = $_REQUEST['burns'];
$head = $_REQUEST['head'];
$symptoms = $_REQUEST['symptoms'];
$otherchanges = $_REQUEST['otherchanges'];
$receivingtreatment = $_REQUEST['receivingtreatment'];
$surgery = $_REQUEST['surgery'];
$Impression = $_REQUEST['Impression'];
$management = $_REQUEST['management'];
$ifyes = $_REQUEST['ifyes'];
$Rehabilitation = $_REQUEST['Rehabilitation'];
$Number = $_REQUEST['Number'];
$Psychological = $_REQUEST['Psychological'];
$diagnostic = $_REQUEST['diagnostic'];
$notrequiretreatment = $_REQUEST['notrequiretreatment'];
$house = $_REQUEST['house'];
$recommendations = $_REQUEST['recommendations'];
$Prognosis = $_REQUEST['Prognosis'];
$CV = $_REQUEST['CV'];
$cervical = $_REQUEST['cervical'];
$heat = $_REQUEST['heat'];
$ice = $_REQUEST['ice'];
$lumbar = $_REQUEST['lumbar'];
$medication = $_REQUEST['medication'];
$posture = $_REQUEST['posture'];
$sport = $_REQUEST['sport'];
$given = $_REQUEST['given'];
$sceneaccident = $_REQUEST['sceneaccident'];
$sql="UPDATE Triage SET sceneaccident='$sceneaccident', notrequiretreatment='$notrequiretreatment', house='$house', recommendations='$recommendations', Prognosis='$Prognosis', CV='$CV', cervical='$cervical', heat='$heat', ice='$ice', lumbar='$lumbar', medication='$medication', posture='$posture', sport='$sport', given='$given' ,organs='$organs', deformity='$deformity', otherchanges='$otherchanges', receivingtreatment='$receivingtreatment', surgery='$surgery', Impression='$Impression', management='$management', ifyes='$ifyes', Rehabilitation='$Rehabilitation', Number='$Number', Psychological='$Psychological', diagnostic='$diagnostic', eyes='$eyes', burns='$burns', head='$head', symptoms='$symptoms', memory='$memory', scaring='$scaring', genitals='$genitals', dental='$dental', stomach='$stomach', directly='$directly', behalfclient='$behalfclient', investigations='$investigations', injuries='$injuries', duties='$duties', Wherepain='$Wherepain', pain='$pain', aggravates='$aggravates', eases='$eases', Movement='$Movement', neural='$neural', UnderstandNPRS='$UnderstandNPRS', NPRSassessment='$NPRSassessment', yourhobbies='$yourhobbies', hobbiesaffected='$hobbiesaffected', social='$social', activities='$activities', lifestyle='$lifestyle', avoiddriving='$avoiddriving', grip='$grip', flashbacks='$flashbacks', braking='$braking', past='$past', psychologically='$psychologically' WHERE Reference='$Reference'";
$result=mysql_query($sql);
if (!$_REQUEST['sceneaccident'] || !$_REQUEST['notrequiretreatment'] || !$_REQUEST['house'] || !$_REQUEST['recommendations'] || !$_REQUEST['Prognosis'] || !$_REQUEST['CV'] || !$_REQUEST['cervical'] || !$_REQUEST['heat'] || !$_REQUEST['ice'] || !$_REQUEST['lumbar'] || !$_REQUEST['medication'] || !$_REQUEST['posture'] || !$_REQUEST['sport'] || !$_REQUEST['given'] || !$_REQUEST['organs'] || !$_REQUEST['deformity'] || !$_REQUEST['otherchanges'] || !$_REQUEST['receivingtreatment'] || !$_REQUEST['surgery'] || !$_REQUEST['Impression'] || !$_REQUEST['management'] || !$_REQUEST['ifyes'] || !$_REQUEST['Rehabilitation'] || !$_REQUEST['Number'] || !$_REQUEST['Psychological'] || !$_REQUEST['diagnostic'] || !$_REQUEST['eyes'] || !$_REQUEST['burns'] || !$_REQUEST['head'] || !$_REQUEST['symptoms'] || !$_REQUEST['memory'] || !$_REQUEST['scaring'] || !$_REQUEST['genitals'] || !$_REQUEST['dental'] || !$_REQUEST['stomach'] || !$_REQUEST['directly'] || !$_REQUEST['behalfclient'] || !$_REQUEST['investigations'] || !$_REQUEST['injuries'] || !$_REQUEST['duties'] || !$_REQUEST['Wherepain'] || !$_REQUEST['pain'] || !$_REQUEST['aggravates'] || !$_REQUEST['eases'] || !$_REQUEST['Movement'] || !$_REQUEST['neural'] || !$_REQUEST['UnderstandNPRS'] || !$_REQUEST['NPRSassessment'] || !$_REQUEST['yourhobbies'] || !$_REQUEST['hobbiesaffected'] || !$_REQUEST['social'] || !$_REQUEST['activities'] || !$_REQUEST['lifestyle'] || !$_REQUEST['avoiddriving'] || !$_REQUEST['grip'] || !$_REQUEST['flashbacks'] || !$_REQUEST['braking'] || !$_REQUEST['past'] || !$_REQUEST['psychologically'] )
{
echo ('You did not complete all of the required fields');
echo "<BR>";
while($rows=mysql_fetch_array($result)){
echo '<a href="update.php?Reference='. $rows['Reference'].' ">update</a>';
}
} // end of while loop
else {
echo "Successful";
echo "<BR>";
echo "<a href='list_records.php'>View result</a>";
}
?>