我正在尝试创建一个表,该表只是通过在表列状态中选择包含QLD的行来生成的。我不确定我的fetch数组是如何工作的,但我知道它会返回适合给定条件的行。
但是html会抛出错误。谁能知道我哪里出错了。
我的PHP代码
<?php
$q = intval($_GET['q']);
$con = mysqli_connect("localhost","root","","test");
if (!$con)
{
die('Could not connect: ' . mysqli_error($con));
}
mysqli_select_db($con,"fabrik");
if($q="1")
{
$sql="SELECT * FROM user WHERE state = 'QLD'";
$result = mysqli_query($con,$sql);
}
echo "<table border='1'>
<tr>
<th>Status</th>
<th>Consultant</th>
<th>Client</th>
<th>Role</th>
<th>Likelyhood</th>
<th>StartDate</th>
<th>EndDate</th>
<th>Comments</th>
</tr>";
while($row = mysqli_fetch_assoc($result))
{
echo "<tr>";
echo "<td>" . $row['statustable_name_'] . "</td>";
echo "<td>" . $row['consultant'] . "</td>";
echo "<td>" . $row['client'] . "</td>";
echo "<td>" . $row['role'] . "</td>";
echo "<td>" . $row['likelyhood'] . "</td>";
echo "<td>" . $row['startdate'] . "</td>";
echo "<td>" . $row['enddate'] . "</td>";
echo "<td>" . $row['comments_'] . "</td>";
echo "</tr>";
}
echo "</table>";
mysqli_close($con);
?>
HTML:
<html>
<head>
<script>
function showUser(str)
{
if (str=="")
{
document.getElementById("txtHint").innerHTML="";
return;
}
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200) // 200 to check the status is ok 4=onreadystatechange event is triggered five times (0-4), one time for each change in readyState
{
document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","view.php?q="+str,true);
xmlhttp.send();
}
</script>
</head>
<body>
<form>
<select name="users" onchange="showUser(this.value)">
<option value="">Select the State </option>
<option value="1">QLD</option>
<option value="2">NSW</option>
<option value="3">VIC</option>
</select>
</form>
<br>
<div id="txtHint"><b>List with selected State will be populated below</b></div>
</body>
</html>
如果有人对我的问题有所了解会很有帮助
由于
答案 0 :(得分:0)
请更改此
if($q="1") to if($q=="1")
您的查询仅在$ q值== 1时执行,并且还要确保您获得$ q值= 1始终
答案 1 :(得分:0)
这是许多人最常犯的错误,您没有检查所调用函数的返回值。当你这样做时:
$result = mysqli_query($con,$sql);
你应该检查$result
是否为假。如果是,则很可能您的查询不正确
通过执行此操作来尝试检查它是否正确
if (!$result) {
die('Invalid query: ' . mysql_error());
}
并且别忘了改变
if($q="1")
带
if($q=="1")
如果您仍然遇到相同的错误,请检查您是否有user
表,其中state
列拼写正确。
这应解决问题