Php 如何将在线考试系统的答案存储到数据库
我正在创建一个在线考试系统,从数据库中获取问题和答案,并在单选按钮中显示选项。但是,问题是如果我单击“保存”,它只保存一个答案,而不是所有问题的答案Php 如何将在线考试系统的答案存储到数据库,php,mysql,Php,Mysql,我正在创建一个在线考试系统,从数据库中获取问题和答案,并在单选按钮中显示选项。但是,问题是如果我单击“保存”,它只保存一个答案,而不是所有问题的答案 $quer=" SELECT * FROM questionset ORDER BY RAND() "; $query=mysqli_query($sql,$quer); while($row = mysqli_fetch_array($query)) { $na= $row['qus']; $opa= $row['opa'];
$quer=" SELECT * FROM questionset ORDER BY RAND() ";
$query=mysqli_query($sql,$quer);
while($row = mysqli_fetch_array($query))
{
$na= $row['qus'];
$opa= $row['opa'];
$opb= $row['opb'];
$opc= $row['opc'];
$opd= $row['opd'];
echo "<div class='pr3'>";
echo "<div id='question'>";
echo $na;
echo "</div>";
echo "<br/>";
echo "<form name='cart' method='post'>";
echo "<input type='radio' name='ans' value='" . $opa. "' onclick='answ(this.value)' >";
echo $opa;
echo "<br/>";
echo "<input type='radio' name='ans' value='" . $opb. "' onclick='answ(this.value)'>";
echo $opb;
echo "<br/>";
echo "<input type='radio' name='ans' value='" . $opc. "' onclick='answ(this.value)'>";
echo $opc;
echo "<br/>";
echo "<input type='radio' name='ans' value='" . $opd. "' onclick='answ(this.value)'>";
echo $opd;
echo "<br/>";
echo "<input type='text' id='ansval' name='ansval' >";
echo "</form>";
echo " </div>";
}
用于获取问题的php代码
$quer=" SELECT * FROM questionset ORDER BY RAND() ";
$query=mysqli_query($sql,$quer);
while($row = mysqli_fetch_array($query))
{
$na= $row['qus'];
$opa= $row['opa'];
$opb= $row['opb'];
$opc= $row['opc'];
$opd= $row['opd'];
echo "<div class='pr3'>";
echo "<div id='question'>";
echo $na;
echo "</div>";
echo "<br/>";
echo "<form name='cart' method='post'>";
echo "<input type='radio' name='ans' value='" . $opa. "' onclick='answ(this.value)' >";
echo $opa;
echo "<br/>";
echo "<input type='radio' name='ans' value='" . $opb. "' onclick='answ(this.value)'>";
echo $opb;
echo "<br/>";
echo "<input type='radio' name='ans' value='" . $opc. "' onclick='answ(this.value)'>";
echo $opc;
echo "<br/>";
echo "<input type='radio' name='ans' value='" . $opd. "' onclick='answ(this.value)'>";
echo $opd;
echo "<br/>";
echo "<input type='text' id='ansval' name='ansval' >";
echo "</form>";
echo " </div>";
}
$query=“按兰德()从问题集顺序选择*”;
$query=mysqli\u查询($sql,$query);
while($row=mysqli\u fetch\u数组($query))
{
$na=$row['qus'];
$opa=$row['opa'];
$opb=$row['opb'];
$opc=$row['opc'];
$opd=$row['opd'];
回声“;
回声“;
echo$na;
回声“;
回声“
”;
回声“;
回声“;
echo$opa;
回声“
”;
回声“;
echo$opb;
回声“
”;
回声“;
echo$opc;
回声“
”;
回声“;
echo$opd;
回声“
”;
回声“;
回声“;
回声“;
}
只更新一个文本框的Javascript
<script>
function answ(answer) {
document.getElementById("ansval").value = answer;
}
</script>
函数answ(答案){
document.getElementById(“ansval”).value=answer;
}
ID字段必须是唯一的
++$counter;
回声“
所有问题的单选按钮名称都相同。您必须为每个答案集动态命名单选按钮。您可以使用以下代码:
$quer=" SELECT * FROM questionset ORDER BY RAND() ";
$query=mysqli_query($sql,$quer);
while($row = mysqli_fetch_array($query))
{
$questionId = $row['questionId']; //primary key of question table
$na= $row['qus'];
$opa= $row['opa'];
$opb= $row['opb'];
$opc= $row['opc'];
$opd= $row['opd'];
echo "<div class='pr3'>";
echo "<div id='question'>";
echo $na;
echo "</div>";
echo "<br/>";
echo "<form name='cart' method='post'>";
echo "<input type='radio' name='ans<?php echo $questionId; ?>' value='" . $opa. "' onclick='answ(this.value,'<?php echo $questionId; ?>')' >";
echo $opa;
echo "<br/>";
echo "<input type='radio' name='ans<?php echo $questionId; ?>' value='" . $opb. "' onclick='answ(this.value,'<?php echo $questionId; ?>')'>";
echo $opb;
echo "<br/>";
echo "<input type='radio' name='ans<?php echo $questionId; ?>' value='" . $opc. "' onclick='answ(this.value,'<?php echo $questionId; ?>')'>";
echo $opc;
echo "<br/>";
echo "<input type='radio' name='ans<?php echo $questionId; ?>' value='" . $opd. "' onclick='answ(this.value,'<?php echo $questionId; ?>')'>";
echo $opd;
echo "<br/>";
echo "<input type='text' id='ansval<?php echo $questionId; ?>' name='ansval<?php echo $questionId; ?>' >";
echo "</form>";
echo " </div>";
}
$query=“按兰德()从问题集顺序选择*”;
$query=mysqli\u查询($sql,$query);
while($row=mysqli\u fetch\u数组($query))
{
$questionId=$row['questionId'];//问题表的主键
$na=$row['qus'];
$opa=$row['opa'];
$opb=$row['opb'];
$opc=$row['opc'];
$opd=$row['opd'];
回声“;
回声“;
echo$na;
回声“;
回声“
”;
回声“;
echo“您没有显示任何类似于保存答案的代码。当有人单击单选按钮时,我会在文本框中显示单选按钮的值,但它只会在一个文本框中更新答案,这就是我没有尝试保存按钮的原因。请检查编辑的问题如何使用该计数器?
<script>
function answ(answer,qId) {
document.getElementById("ansval"+qId).value = answer;
}
</script>