データベースの結果がないときに何も返さない方法を知っていますか?結果がある場合はうまく表示されますが、結果がない場合はこれが発生します。私は、データが提出されたときに結果を示すために画像を添付しました! 条件が結果と一致しない場合は、何も表示しないでください。データベースからの出力がないときに何も返さない方法
ご協力いただきありがとうございます。
Click here for an image of my result
if(isset($_POST['submit'])){
$rap=$_POST['AtRap'];
$percent = (15/100);
$diff = $percent * $rap ;
$a= $rap - $diff;
$b= $rap + $diff;
$query = mysqli_query($con,"SELECT Max(Shape), Max(Clarity), Max(Colour), Max(Carat), Max(RapNinety), Max(AtRap) FROM Rapaport WHERE (SELECT AtRap BETWEEN '$a' AND '$b') AND (Colour='J' and Clarity='VS2' and Shape='Round') LIMIT 1 ") ;
$query2 = mysqli_query($con,"SELECT Max(Shape), Max(Clarity), Max(Colour), Max(Carat), Max(RapNinety), Max(AtRap) FROM Rapaport WHERE (SELECT AtRap BETWEEN '$a' AND '$b') AND (Colour='G' and Clarity='VS1' and Shape='Round') LIMIT 1 ") ;
$query3 = mysqli_query($con,"SELECT Max(Shape), Max(Clarity), Max(Colour), Max(Carat), Max(RapNinety), Max(AtRap) FROM Rapaport WHERE (SELECT AtRap BETWEEN '$a' AND '$b') AND (Colour='F' and Clarity='VVS2' and Shape='Round') LIMIT 1") ;
$query4 = mysqli_query($con,"SELECT Max(Shape), Max(Clarity), Max(Colour), Max(Carat), Max(RapNinety), Max(AtRap) FROM Rapaport WHERE (SELECT AtRap BETWEEN '$a' AND '$b') AND (Colour='D' and Clarity='VVS1' and Shape='Round') LIMIT 1") ;
$count4 = mysqli_num_fields($query4);
if($count4 == 0){
echo "<script type='text/javascript'>alert('No Results')</script>";
}else{
while($row4 = mysqli_fetch_array($query4)) {
$shape = $row4['Max(Shape)'];
$clarity = $row4['Max(Clarity)'];
$colour = $row4['Max(Colour)'];
$carat = $row4['Max(Carat)'];
$rap90 = $row4['Max(RapNinety)'];
$atrap = $row4['Max(AtRap)'];
$output .= " <br /><br />Shape: <b>$shape</b> Clarity: $clarity Colour: $colour Carat: $carat <br /><br /> Price Quote: <br /><br /> <b>$$rap90 - $$atrap</b> (in SGD)<br /><br /> ";
}
}
$count3 = mysqli_num_fields($query3);
if($count3 == 0){
echo "<script type='text/javascript'>alert('No Results')</script>";
}else{
while($row3 = mysqli_fetch_array($query3)) {
$shape = $row3['Max(Shape)'];
$clarity = $row3['Max(Clarity)'];
$colour = $row3['Max(Colour)'];
$carat = $row3['Max(Carat)'];
$rap90 = $row3['Max(RapNinety)'];
$atrap = $row3['Max(AtRap)'];
$output .= " <br /><br />Shape: <b>$shape</b> Clarity: $clarity Colour: $colour Carat: $carat <br /><br /> Price Quote: <br /><br /> <b>$$rap90 - $$atrap</b> (in SGD)<br /><br /> ";
}
}
$count2 = mysqli_num_fields($query2);
if($count2 == 0){
echo "<script type='text/javascript'>alert('No Results')</script>";
}else{
while($row2 = mysqli_fetch_array($query2)) {
$shape = $row2['Max(Shape)'];
$clarity = $row2['Max(Clarity)'];
$colour = $row2['Max(Colour)'];
$carat = $row2['Max(Carat)'];
$rap90 = $row2['Max(RapNinety)'];
$atrap = $row2['Max(AtRap)'];
$output .= " <br /><br />Shape: <b>$shape</b> Clarity: $clarity Colour: $colour Carat: $carat <br /><br /> Price Quote: <br /><br /> <b>$$rap90 - $$atrap</b> (in SGD)<br /><br /> ";
}
}
$count = mysqli_num_fields($query);
if($count == 0){
echo "<script type='text/javascript'>alert('No Results')</script>";
}else{
while($row = mysqli_fetch_array($query)) {
$shape = $row['Max(Shape)'];
$clarity = $row['Max(Clarity)'];
$colour = $row['Max(Colour)'];
$carat = $row['Max(Carat)'];
$rap90 = $row['Max(RapNinety)'];
$atrap = $row['Max(AtRap)'];
$output .= " <br /><br />Shape: <b>$shape</b> Clarity: $clarity Colour: $colour Carat: $carat <br /><br /> Price Quote: <br /><br /> <b>$$rap90 - $$atrap</b> (in SGD)<br /><br /> ";
}
}
}
私は何も表示されなかったので何も表示されなかったので、誤解をおかけして申し訳ありませんでした! –