我有一个表，当我想单击一个按钮时，它将数据从数据库获取到表，我尝试此代码，但出现错误。
<div class="wrapper wrapper-content animated fadeInRight">
<div class="row">
<div class="col-lg-12">
<div class="ibox float-e-margins">
<div class="ibox-title">
<h5>Conference Table</h5>
<div class="ibox-tools">
<a class="collapse-link">
<i class="fa fa-chevron-up"></i>
</a>
<a class="dropdown-toggle" data-toggle="dropdown" href="table_data_tables.php#">
<i class="fa fa-wrench"></i>
</a>
<ul class="dropdown-menu dropdown-user">
<li><a href="table_data_tables.php#">Config option 1</a>
</li>
<li><a href="table_data_tables.php#">Config option 2</a>
</li>
</ul>
<a class="close-link">
<i class="fa fa-times"></i>
</a>
</div>
</div>
<div class="ibox-content">
<div class="form-group">
<div class="col-sm-4 col-sm-offset-5">
<button class="btn btn-white" type="submit">Cancel</button>
<button class="btn btn-primary" type="submit">Run Report</button>
</div>
</div>
<table class="table table-striped table-bordered table-hover dataTables-example" >
<thead>
<tr>
<th>No</th>
<th>Aim</th>
<th>Date</th>
<th>Funded</th>
<th>Male</th>
<th>Female</th>
<th>Disabled</th>
<th>Total</th>
<th>Comments</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<?php
$mysqli = new mysqli( 'localhost', 'user2', 'password', 'database' );
if (mysqli_connect_error()) {
echo mysqli_connect_error();
exit();
}
if (isset($_POST['submit'])) {
$query = 'SELECT * FROM conference';
$data = mysqli_query($mysqli, $query) ;
if (!$data) {
echo("Error description: " . mysqli_error($mysqli));
} else {
while ($row = mysqli_fetch_array($data)) {
echo "<tr>
<td>" . $row['NOTW'] . "</td>
<td>" . $row['Aim'] . "</td>
<td>" . $row['date'] . "</td>
<td>" . $row['Funded'] . "</td>
<td>" . $row['Male'] . "</td>
<td>" . $row['Female'] . "</td>
<td>" . $row['Disabled'] . "</td>
<td>" . $row['Total'] . "</td>
<td>" . $row['Comments'] . "</td>
<td> Edit Trush </td>
</tr>";
}
}
}
?>
</tbody>
<tfoot>
</tfoot>
</table>
</div>
</div>
</div>
错误是
Warning: mysqli_fetch_array() expects parameter 1 to be mysqli_result, null given in /home/cshrnaf/public_html/MIS_CSHRN/reporttest.php on line 265
265行:
while($row = mysqli_fetch_array($data))
更新
将代码更改为:
<div class="ibox-content">
<table class="table table-striped table-bordered table-hover dataTables-example" >
<thead>
<tr>
<th>No</th>
<th>Aim</th>
<th>Date</th>
<th>Funded</th>
<th>Male</th>
<th>Female</th>
<th>Disabled</th>
<th>Total</th>
<th>Comments</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<?php
$mysqli = new mysqli( 'localhost', 'user2', 'password', 'database' );
if (mysqli_connect_error()) {
echo mysqli_connect_error();
exit();
}
/*
if(isset($_POST['submit']))
{
*/
$query = 'SELECT * FROM conference';
$data = mysqli_query($mysqli, $query);
while($row = mysqli_fetch_array($data))
{
echo " <tr>
<td>" . $row['NOTW'] . "</td>
<td>" . $row['Aim'] . "</td>
<td>" . $row['date'] . "</td>
<td>" . $row['Funded'] . "</td>
<td>" . $row['Male'] . "</td>
<td>" . $row['Female'] . "</td>
<td>" . $row['Disabled'] . "</td>
<td>" . $row['Total'] . "</td>
<td>" . $row['Comments'] . "</td>
<td> Edit Trush </td>
</tr>";
}
//}
?>
</tbody>
<tfoot>
</tfoot>
</table>
</div>
</div>
</div>
如果页面加载，数据也会被加载
最佳答案
如果 isset($_POST['submit']) 返回 false，则永远不会执行查询，并且 $data 为 null。但 while 循环会被执行。因此，将您的代码更改为:
if (isset($_POST['submit'])) {
$query = 'SELECT * FROM conference';
$data = mysqli_query($mysqli, $query) ;
if (!$data) {
echo("Error description: " . mysqli_error($mysqli));
} else {
while ($row = mysqli_fetch_array($data)) {
echo "<tr>
<td>" . $row['NOTW'] . "</td>
<td>" . $row['Aim'] . "</td>
<td>" . $row['date'] . "</td>
<td>" . $row['Funded'] . "</td>
<td>" . $row['Male'] . "</td>
<td>" . $row['Female'] . "</td>
<td>" . $row['Disabled'] . "</td>
<td>" . $row['Total'] . "</td>
<td>" . $row['Comments'] . "</td>
<td> Edit Trush </td>
</tr>";
}
}
}
更新
在 $_POST 中使用名称。不是类型，所以更改:
<button class="btn btn-primary" type="submit">Run Report</button>
到
<button class="btn btn-primary" type="submit" name="Report">Run Report</button>
和
if (isset($_POST['submit'])) {
至
if (isset($_POST['report'])) {
关于php - 单击提交按钮时从数据库中选择数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38344415/