Php 更新选定复选框值的sql表
我使用复选框动态创建表行。检查其中一些,然后对所选的执行并更新查询。但我面临的问题是,即使我使用了foreach循环,也只有第一个选定的记录得到更新。 下面是代码Php 更新选定复选框值的sql表,php,html,forms,Php,Html,Forms,我使用复选框动态创建表行。检查其中一些,然后对所选的执行并更新查询。但我面临的问题是,即使我使用了foreach循环,也只有第一个选定的记录得到更新。 下面是代码 <?php $checkbox = $_POST['pr']; $year = $_POST['promoteyearselect1']; $semester = $_POST['promotesemselect1']; @ $db = mysql_connect("abc
<?php
$checkbox = $_POST['pr'];
$year = $_POST['promoteyearselect1'];
$semester = $_POST['promotesemselect1'];
@ $db = mysql_connect("abc", "abc", "");
mysql_select_db("abc");
foreach($checkbox as $value){
if(isset($checkbox)){
if(($semester%2)==0) {
$strSQL = "UPDATE student SET year='".++$year."', semester='".++$semester."' WHERE enrollment='".$value."'";
$rs = mysql_query($strSQL);
if($rs){
echo 'Promotion Successful';
header("location:page1.php");
echo '<script> alert("Promotion Successful");</script>';
}
else echo "Sorry, but that did not work. ";
}
else{
$strSQL = "UPDATE student SET semester=".++$semester."' WHERE enrollment='".$value."'";
$rs = mysql_query($strSQL);
if($rs){
echo 'Promotion Successful';
header("location:page1.php");
echo '<script> alert("Promotion Successful");</script>';
}
else echo "Sorry, but that did not work. ";
}
}
}
mysql_close($db);
?>
我在您的代码中未找到任何名为“pr”的复选框。如果有。请将其设置为数组并重试
像
我在你的代码中没有找到任何名为“pr”的复选框。如果有。请将其设置为数组并重试
就像
这里是最终对我有效的修改后的代码,我在if($Semment%2!=0)
这是最终对我有效的修改后的代码,我在if($sement%2!=0)
欢迎使用堆栈溢出。它们不再得到维护。看到了吗?相反,学习,并使用or-将帮助您决定哪一个。如果您选择PDO,。在php代码中,您使用的是一个名为“pr”的变量,但我在HTML代码段中没有看到带有此名称的复选框。请显示它们。@user4035在最后添加了PHP代码,生成了名为“pr”的复选框@DaveChen我切换到mysqli API,仍然只更新了第一条记录,其余记录没有更新:/@AkashGupta将var_转储($checkbox);在foreach之前给我看看结果。我在你的代码中没有看到任何重要的错误。仅当(isset($checkbox))离开forach并放在foreach之前时才移动。无需检查,数组是否一直在定义。欢迎使用堆栈溢出。它们不再得到维护。看到了吗?相反,学习,并使用or-将帮助您决定哪一个。如果您选择PDO,。在php代码中,您使用的是一个名为“pr”的变量,但我在HTML代码段中没有看到带有此名称的复选框。请显示它们。@user4035在最后添加了PHP代码,生成了名为“pr”的复选框@DaveChen我切换到mysqli API,仍然只更新了第一条记录,其余记录没有更新:/@AkashGupta将var_转储($checkbox);在foreach之前给我看看结果。我在你的代码中没有看到任何重要的错误。仅当(isset($checkbox))离开forach并放在foreach之前时才移动。无需检查,数组是否一直在定义。
<div class="dropdown dropdown-dark">
<select name="promoteyearselect1" id="promoteyearselect1" class="dropdown-select" onfocus="showhidephdmenu()" form="promotionform" required>
<option value="">Select an option</option>
<div id="yearselect1">
<option value="1">1st</option>
<option value="2">2nd</option>
<option value="3">3rd</option>
<option value="4">4th</option>
<option value="5">5th</option>
</div>
</option>
</select>
</div>
<div class="dropdown dropdown-dark">
<select name="promotesemselect1" id="promotesemselect1" class="dropdown-select" form="promotionform" required>
<option value="">Select an option</option>
<option value="1">1st</option>
<option value="2">2nd</option>
<option value="3">3rd</option>
<option value="4">4th</option>
<option value="5">5th</option>
<option value="6">6th</option>
<option value="7">7th</option>
<option value="8">8th</option>
<option value="9">9th</option>
<option value="10">10th</option>
</select>
</div>
<button id="promotego" class="login-button" style=" position:relative; padding: 0 0 0; " onclick="getpromotestudents()"></button>
</div>
<form id="promotionform" action="promotestudents.php" method="POST">
<div id="promoteresults">
The results will show up here..!!
</div>
<div style=" position:relative; margin-top:10px; padding-left:44%;">
<input type="submit" value="Promoted" class="button black"></input>
<a href="#" class="button black">Passed Out</a>
</div>
</form>
$i=1;
while($r = mysql_fetch_array($rs)){
echo "<tr>";
echo "<td class='promotetabledata'>".$r[7]."</td>";
echo "<td class='promotetabledata'>".$r[6]."</td>";
echo "<td class='promotetabledata'><input type='checkbox' name='pr[]' value='".$r[7]."'/></td>";
echo "</tr>";
$i++;
}
<?php
$checkbox = $_POST['pr'];
$year = $_POST['promoteyearselect1'] + 1 ;
$semester = $_POST['promotesemselect1'] + 1;
$con = mysqli_connect("localhost","root","","university") or die("Error " . mysqli_error($con));
foreach($checkbox as $value){
if(isset($checkbox)){
// echo $value;
if( $semester % 2 != 0) {
// echo $value;
$strSQL = "UPDATE student SET year='".$year."', semester='".$semester."' WHERE enrollment='".$value."'";
$rs = mysqli_query($con, $strSQL);
if($rs){
echo 'Promotion Successful';
header("location:page1.php");
echo '<script> alert("Promotion Successful");</script>';
}
else echo "Sorry, but that did not work. ";
}
else{
$strSQL = "UPDATE student SET semester='".$semester."' WHERE enrollment='".$value."'";
$rs = mysqli_query($con, $strSQL);
if($rs){
echo 'Promotion Successful';
header("location:page1.php");
echo '<script> alert("Promotion Successful");</script>';
}
else echo "Sorry, but that did not work. ";
}
}
}
mysqli_close($con);
?>