使用复选框值更新SQL数据库
好的我知道这已经回答了几次，但我似乎无法让我的工作！
我的数据库中有8周（设置为列），我用php显示这些值，如下所示
<form method="post" id="updating" action="<?php $_PHP_SELF ?>">
<?php
$count = 1;
foreach ($results as $v) {
while($count<9){
$week = Week.$count;
$checkvalue = $v -> $week;
?>
Week<?echo $count;?> <input type="checkbox" id="Week<?php echo$count;?>" name="week[]" value="<?php echo $checkvalue;?>" <?php if($checkvalue==1){?>
checked="checked"
<?php } ?>
/>
<?php
$count++;
}
}
?>
<input name="update" type="submit" id="update" value="Update">
</form>
我知道它可能不像它应该的那样优雅，但它会为我输出正确的HTML并显示数据库中显示的信息。
<form method="post" id="updating" action="">
Week1 <input type="checkbox" id="Week1" name="week[]" value="1" checked="checked"
/>
Week2 <input type="checkbox" id="Week2" name="week[]" value="0" />
Week3 <input type="checkbox" id="Week3" name="week[]" value="1" checked="checked"
/>
Week4 <input type="checkbox" id="Week4" name="week[]" value="1" checked="checked"
/>
Week5 <input type="checkbox" id="Week5" name="week[]" value="0" />
Week6 <input type="checkbox" id="Week6" name="week[]" value="1" checked="checked"
/>
Week7 <input type="checkbox" id="Week7" name="week[]" value="1" checked="checked"
/>
Week8 <input type="checkbox" id="Week8" name="week[]" value="1" checked="checked"
/>
<input name="update" type="submit" id="update" value="Update">
</form>
我遇到的问题是当我勾选或取消选中这些复选框时，似乎没有捕获更新的值，因此数据库没有正确更新。这是处理自我发布请求的地方。
<?php if(isset($_POST['update']))
{
$count = 1;
if(isset($_POST['week']) && !empty($_POST['week']))
foreach($_POST['week'] as $w){ echo $w; //prints 1 all the time
$week = Week.$count;
echo $week;//prints out weeks I want to update correctly (database headings)
$query = $db->getQuery(true);
// Fields to update.
$fields = array(
$week.'=' . $db->quote( $w ));
// Conditions for which records should be updated.
$conditions = array(
'UserID='. (int) $user_id);
$query->update($db->quoteName('tools_engage'))->set($fields)->where($conditions);
$db->setQuery($query);
try {
$result = $db->query(); // Use $db->execute() for Joomla 3.0.
echo ("Values saved and updated </br>");
$count++;
} catch (Exception $e) {
// Catch the error.
}
}
}?>
我在Joomla中这样做，因此奇怪的数据库更新语法，但它确实有效，我已经在这个程序的其他地方使用它们所以我知道它们不是问题
正如我在代码中评论的那样，无论我检查或取消选中哪个框，数组周[]似乎都包含所有内容的值1。然后，这会导致数据库中的每个值都更新为1 / true，这显然是不对的。
我怀疑问题在于我的HTML输出更新表单，但似乎无法破解它，非常感谢任何帮助！
更新 好的，所以继续nvuono的建议我已经更新我的表格就像这样
<?php
$count = 1;
foreach ($results as $v) {
while($count<9){
$week = Week.$count;
$checkvalue = $v -> $week;
?>
Week<?echo $count;?> <input type="checkbox" id="Week<?php echo$count;?>" name="week[<?php echo $count;?>]" value="1" <?php if($checkvalue==1){?>
checked="checked"
<?php } ?>
/>
<?php
$count++;
}
}
?>
那么现在每个名字在数组中都有一个索引吗？如果是这样的话，我应该
if(isset($_POST['update']))
部分现在不按照输入的顺序打印出数组中的所有值？
即。我的逻辑是它打印出1,0,0,1,0,0,0（选中框1和4）或者检查了哪些框。但相反它只打印出1,1因此我无法知道它们是什么样的索引，以及随后我应该更新的那一周
1 个答案:
答案 0 :(得分：1)
我添加了一些非常hacky的更新方式。使用post时，您需要注意SQL注入和其他不好的事情...确保始终验证和清理数据。 “hacky”方式有效，因为我们使用整数值，并且很容易清理。
截图：
这是我的表...我为了stackoverflow而调用它...
+----+-------+-------+-------+-------+-------+-------+-------+-------+
| id | week1 | week2 | week3 | week4 | week5 | week6 | week7 | week8 |
+----+-------+-------+-------+-------+-------+-------+-------+-------+
| 1 | | | | | | | | |
| 2 | 1 | | | | | | | |
| 3 | 1 | | 1 | | | | | |
| 4 | 1 | | 1 | | 1 | | | |
| 5 | 1 | | 1 | | 1 | | 1 | |
+----+-------+-------+-------+-------+-------+-------+-------+-------+
这是我的PHP文件....（将其粘贴在一个空的PHP文档中运行，除了更改数据库连接和查询之外，它是自包含的）
<?php
$mysqli = new mysqli("localhost", "root", "password", "test");
if (!empty($_POST)) {
print "<pre>POST VARS: \n".print_r($_POST,true)."</pre>";
foreach($_POST as $i => $data)
{
if (substr($i,0,3)=='row' && is_numeric(substr($i,3)))
{
$row_id = substr($i,3);
$data = array_flip($data);
$values = array();
for ($x=1; $x<9; $x++) {
$values[] = "week$x = ". ((isset($data[$x])) ? '1' : '0');
}
$stmt = "\nupdate so ".
"\n set ".implode(", \n ",$values).
"\n where id = $row_id; \n";
$update = $mysqli->query($stmt);
if ($update) { print "Row $row_id updated successfully.<br/>"; }
}
print "<br/>";
}
}
$result = $mysqli->query("select * from so");
$mysqli->close();
?>
<form method="post" id="updating" action="<?php $_PHP_SELF ?>">
<?php
while($row = $result->fetch_object())
{
$count = 1;
print "<div style='border:1px solid black; display:inline-block;'>\n";
print "Row ".$row->id."<br/>\n";
while($count < 9)
{
$week = "week$count";
$checkvalue = $row->{$week};
?>
Week<?php echo $count ?> <input type="checkbox" id="Week<?php echo$count;?>" name="row<?php echo $row->id
?>[]" value="<?php echo $count;?>" <?php if($checkvalue==1){
?> checked="checked" <?php } ?> />
<?php
$count++;
}
print "</div><br/><br/>\n\n\n";
}
?>
<input name="update" type="submit" id="update" value="Update">
</form>
这是提交后的$_POST：
POST VARS:
Array
(
[row2] => Array
(
[0] => 1
)
[row3] => Array
(
[0] => 1
[1] => 3
)
[row4] => Array
(
[0] => 1
[1] => 3
[2] => 5
)
[row5] => Array
(
[0] => 1
[1] => 3
[2] => 5
[3] => 7
)
[update] => Update
)
表单的“查看来源”：
<form method="post" id="updating" action="">
<div style='border:1px solid black; display:inline-block;'>
Row 1<br/>
Week1 <input type="checkbox" id="Week1" name="row1[]" value="1" />
Week2 <input type="checkbox" id="Week2" name="row1[]" value="2" />
Week3 <input type="checkbox" id="Week3" name="row1[]" value="3" />
Week4 <input type="checkbox" id="Week4" name="row1[]" value="4" />
Week5 <input type="checkbox" id="Week5" name="row1[]" value="5" />
Week6 <input type="checkbox" id="Week6" name="row1[]" value="6" />
Week7 <input type="checkbox" id="Week7" name="row1[]" value="7" />
Week8 <input type="checkbox" id="Week8" name="row1[]" value="8" />
</div><br/><br/>
<div style='border:1px solid black; display:inline-block;'>
Row 2<br/>
Week1 <input type="checkbox" id="Week1" name="row2[]" value="1" checked="checked" />
Week2 <input type="checkbox" id="Week2" name="row2[]" value="2" />
Week3 <input type="checkbox" id="Week3" name="row2[]" value="3" />
Week4 <input type="checkbox" id="Week4" name="row2[]" value="4" />
Week5 <input type="checkbox" id="Week5" name="row2[]" value="5" />
Week6 <input type="checkbox" id="Week6" name="row2[]" value="6" />
Week7 <input type="checkbox" id="Week7" name="row2[]" value="7" />
Week8 <input type="checkbox" id="Week8" name="row2[]" value="8" />
</div><br/><br/>
<div style='border:1px solid black; display:inline-block;'>
Row 3<br/>
Week1 <input type="checkbox" id="Week1" name="row3[]" value="1" checked="checked" />
Week2 <input type="checkbox" id="Week2" name="row3[]" value="2" />
Week3 <input type="checkbox" id="Week3" name="row3[]" value="3" checked="checked" />
Week4 <input type="checkbox" id="Week4" name="row3[]" value="4" />
Week5 <input type="checkbox" id="Week5" name="row3[]" value="5" />
Week6 <input type="checkbox" id="Week6" name="row3[]" value="6" />
Week7 <input type="checkbox" id="Week7" name="row3[]" value="7" />
Week8 <input type="checkbox" id="Week8" name="row3[]" value="8" />
</div><br/><br/>
<div style='border:1px solid black; display:inline-block;'>
Row 4<br/>
Week1 <input type="checkbox" id="Week1" name="row4[]" value="1" checked="checked" />
Week2 <input type="checkbox" id="Week2" name="row4[]" value="2" />
Week3 <input type="checkbox" id="Week3" name="row4[]" value="3" checked="checked" />
Week4 <input type="checkbox" id="Week4" name="row4[]" value="4" />
Week5 <input type="checkbox" id="Week5" name="row4[]" value="5" checked="checked" />
Week6 <input type="checkbox" id="Week6" name="row4[]" value="6" />
Week7 <input type="checkbox" id="Week7" name="row4[]" value="7" />
Week8 <input type="checkbox" id="Week8" name="row4[]" value="8" />
</div><br/><br/>
<div style='border:1px solid black; display:inline-block;'>
Row 5<br/>
Week1 <input type="checkbox" id="Week1" name="row5[]" value="1" checked="checked" />
Week2 <input type="checkbox" id="Week2" name="row5[]" value="2" />
Week3 <input type="checkbox" id="Week3" name="row5[]" value="3" checked="checked" />
Week4 <input type="checkbox" id="Week4" name="row5[]" value="4" />
Week5 <input type="checkbox" id="Week5" name="row5[]" value="5" checked="checked" />
Week6 <input type="checkbox" id="Week6" name="row5[]" value="6" />
Week7 <input type="checkbox" id="Week7" name="row5[]" value="7" checked="checked" />
Week8 <input type="checkbox" id="Week8" name="row5[]" value="8" />
</div><br/><br/>
<input name="update" type="submit" id="update" value="Update">
</form>
修改
我回到这个回答引用的东西，我刚刚意识到我正在重复使用ID值作为复选框。在这种情况下这不是问题，但总是不好的做法。每个复选框都应具有页面上唯一的ID。所以....它应该是id="row1week1"，id="row1week2" ...... id="row8week1" ... id="row8week8"。
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