異なるタブを表示する必要があります。最初のタブに問題のない最初のグラフが表示されますが、2番目のタブに2番目のグラフを表示する際に問題があります。私は2番目のタブをクリックすると、私はこれらのエラーを取得し続ける:警告:mysqli :: query():C: xampp htdocs palo graph.phpにmysqliをフェッチできませんでした
ここWarning: mysqli::query(): Couldn't fetch mysqli in C:\xampp\htdocs\palo\graph.php on line 248
Warning: main(): Couldn't fetch mysqli in C:\xampp\htdocs\palo\graph.php on line 248
Warning: main(): Couldn't fetch mysqli in C:\xampp\htdocs\palo\graph.php on line 248
Error code():
は私のコードです:
<div id="c2017" class="tabcontent">
<center>
<?php
$strQuery = "SELECT COUNT(*) as student_count, exam_year, result FROM studentsinfo WHERE exam_year = 2017 GROUP BY result ORDER BY student_count DESC";
$result = $dbhandle->query($strQuery) or exit("Error code ({$dbhandle->errno}): {$dbhandle->error}");
if ($result) {
$arrData = array(
"chart" => array(
"caption" => "TEST RESULTS GRAPH FOR SCHOOL YEAR 2017",
"showValues" => "0",
"theme" => "fint"
)
);
$arrData["data"] = array();
while($row = mysqli_fetch_array($result)) {
array_push($arrData["data"], array(
"label" => $row["result"],
"value" => $row["student_count"]
)
);
}
$jsonEncodedData = json_encode($arrData);
$columnChart = new FusionCharts("column2D", "myFirstChart" , 700, 400, "chart-1", "json", $jsonEncodedData);
$columnChart->render();
$dbhandle->close();
}
?>
<br>
<div id="chart-1"></div>
</center>
</div>
<div id="c2018" class="tabcontent">
<center>
<?php
$strQuery2 = "SELECT COUNT(*) as student_count, exam_year, result FROM studentsinfo WHERE exam_year = 2018 GROUP BY result ORDER BY student_count DESC";
$result2 = $dbhandle->query($strQuery2) or exit("Error code ({$dbhandle->errno}): {$dbhandle->error}");
if ($result2) {
$arrData2 = array(
"chart" => array(
"caption" => "TEST RESULTS GRAPH FOR SCHOOL YEAR 2018",
"showValues" => "0",
"theme" => "fint"
)
);
$arrData2["data"] = array();
while($row2 = mysqli_fetch_array($result2)) {
array_push($arrData2["data"], array(
"label" => $row2["result"],
"value" => $row2["student_count"]
)
);
}
$jsonEncodedData2 = json_encode($arrData2);
$columnChart2 = new FusionCharts("column2D", "mySecondChart" , 700, 400, "chart-2", "json", $jsonEncodedData2);
$columnChart2->render();
$dbhandle->close();
}
?>
<br>
<div id="chart-2"></div>
</center>
</div>
エラーがどこかにありますin:
$strQuery2 = "SELECT COUNT(*) as student_count, exam_year, result FROM studentsinfo WHERE exam_year = 2018 GROUP BY result ORDER BY student_count DESC";
$result2 = $dbhandle->query($strQuery2) or exit("Error code ({$dbhandle->errno}): {$dbhandle->error}");
私はまだこのことを初めて知っているので、エラーの意味は分かりません。誰かがこの問題を眺めてコードを修正できるように願っています。どうもありがとうございます!
今、私は知っています。どうもありがとうございます!! – Dza