我的代码存在问题：
错误是：Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in C:\xampp\htdocs\siix_dev\overtime\track_reports.php on line 333
我认为联接表函数中的错误，但我无法分析这种情况下的解决方案。
<?php
include ("config.php");
$bagianWhere = "";
if (isset($_POST['chkBadge']))
{
$badge_id = $_POST['badge_id'];
$status_acknowledge = "Acknowledged";
if (empty($bagianWhere))
{
$bagianWhere .= "badge_id = '$badge_id' order and t_submissions.submission_no=t_acknowledged.submission_no and t_acknowledged.status_acknowledge='$status_acknowledge' by time_submission DESC";
}
}
if (isset($_POST['chkEmp']))
{
$employee_name = $_POST['employee_name'];
$status_acknowledge = "Acknowledged";
if (empty($bagianWhere))
{
$bagianWhere .= "employee_name LIKE '$employee_name' and t_submissions.submission_no=t_acknowledged.submission_no and t_acknowledged.status_acknowledge='$status_acknowledge' order by time_submission DESC";
}
else
{
$bagianWhere .= " AND employee_name LIKE '$employee_name' and t_submissions.submission_no=t_acknowledged.submission_no and t_acknowledged.status_acknowledge='$status_acknowledge' order by time_submission DESC";
}
}
if (isset($_POST['chkOtdate']))
{
$date_from = $_POST['date_from'];
$date_to = $_POST['date_to'];
$status_acknowledge = "Acknowledged";
if (empty($bagianWhere))
{
$bagianWhere .= "ot_date between '$date_from' and '$date_to' and t_submissions.submission_no=t_acknowledged.submission_no and t_acknowledged.status_acknowledge='$status_acknowledge' order by time_submission DESC";
}
else
{
$bagianWhere .= " AND ot_date between '$date_from' and '$date_to' and t_submissions.submission_no=t_acknowledged.submission_no and t_acknowledged.status_acknowledge='$status_acknowledge' order by time_submission DESC";
}
}
$query = "SELECT t_submissions.submission_no, t_submissions.badge_id,
t_submissions.employee_name, t_submissions.ot_date, t_submissions.dept_name,
t_submissions.ot_from, t_submissions.ot_to,
t_submissions.remarks, t_submissions.submission_by, t_acknowledged.acknowledge_by,
FROM t_submissions, t_acknowledged WHERE ".$bagianWhere;
$hasil = mysql_query($query);
if(mysql_num_rows($hasil) > 0)
{
?>
<div class="outer">
<div id="main" class="wrapper">
<div class="content-area">
<table cellspacing="0" class="font">
<thead>
<tr>
<th class="th">Form No</th>
<th class="th">Badge ID</th>
<th class="th">Name</th>
<th class="th">OT Date</th>
<th class="th">OT From</th>
<th class="th">OT To</th>
<th class="th">Submission By</th>
<th class="th">Status Ack.</th>
<th class="th">Status App.</th>
</tr>
</thead>
<?php
while($submission = mysql_fetch_array($hasil))
{?>
<tbody>
<tr>
<td class="td"><?php echo $submission['submission_no'];?></td>
<td class="td"><?php echo $submission['badge_id'];?></td>
<td class="td"><?php echo $submission['employee_name'];?></td>
<td class="td"><?php echo $submission['ot_date'];?></td>
<td class="td"><?php echo $submission['ot_from'];?></td>
<td class="td"><?php echo $submission['ot_to'];?></td>
<td class="td"><?php echo $submission['submission_by'];?></td>
<td class="td"><?php echo $submission['acknowledge_by'];?></td>
<td class="td"><?php echo $submission['approval_by'];?></td>
</tr>
</tbody>
<?php
}?>
</table>
</div>
</div>
</div>
<?php
}
else
{
echo '<p STYLE="position:absolute; TOP:170px; left:500px;">Data not found.</p>';
}
;
?>
使用日期范围输入和2个表关系进行搜索。
请帮我解决这个问题。 谢谢。
答案 0 :(得分：0)
SQL查询设置不正确（因此向FALSE提供mysql_num_rows）。最有可能在WHERE条款$bagianWhere中。乍一看似乎如果设置$_POST['chkEmp']和$_POST['chkOtdate']，它将返回错误，因为后者不以AND开头。
我建议您使用所有可能的组合自己测试查询（它们看起来很小）。
此外，这里真的需要笛卡尔产品吗？
修改：$bagianWhere .= "badge_id = '$badge_id' order and - order似乎不合适？