我在Select All选项中看到了很多演示或类似的问题。但我想要的是只有一个下拉菜单，允许我选择All选项而不显示整个选择框。
以下是我的示例HTML：
<select name="status" id="status" style="width: 224px;">
<option value="" selected="selected">Please select...</option>
<option value="All">All</option>
<option value="Option1">Option1</option>
<option value="Option2">Option2</option>
<option value="Option3">Option3</option>
<option value="Option4">Option4</option>
</select>
从上面的代码中我想只使用All选项过滤结果。
所以这是我过滤页面并在表格中显示结果的页面，
<script>
$(document).ready(function(){
$("#results").show();
});
</script>
<script type="text/javascript">
$(document).ready(function(){
$("#RetrieveList").on('click',function() {
var status = $('#status').val();
var date = $('#Date').val();
var date1 = $('#Date1').val();
$.post('retrieve_status.php',{status:status, date:date, date1:date1}, function(data){
$("#results").html(data);
});
return false;
});
});
</script>
<form id="form2" name="form2" method="post" action="">
<table width="941" border="0" align="center">
<tr>
<th width="935" colspan="9" scope="col">Status:
<select name="status" id="status" style="width: 224px;">
<option value="" selected="selected">Please select...</option>
<option value="All">All</option>
<option value="Option1">Option1</option>
<option value="Option2">Option2</option>
<option value="Option3">Option3</option>
<option value="Option4">Option4</option>
</select>
Start Date:<input type="text" name="Date" id="Date" size="8"/>
End Date:<input type="text" name="Date1" id="Date1" size="8"/>
<input name="action" type="submit" id="RetrieveList" value="Retrieve List" />
</th>
</tr>
</table>
</form>
<div id="results">
</div>
这就是我获取数据的方式，UPDATED显示来自Adam Silenko的代码
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDBPDO";
// check data before use it and convert from string to expected type, use try, not like here:
$status = $_POST['status'];
$date = $_POST['date'];
$date1 = $_POST['date1'];
// use valid data to select rows
try {
//1. connect to MySQL database
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
//2. set the PDO error mode to exception
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
//3. create query string (here is answer on your question)
$sql = 'SELECT column1, column2, status FROM tracker WHERE 1=1';
if ($status != 'ALL') $sql .= ' AND status = :st';
$sql .= ' AND scheduled_start_date BETWEEN :d1 AND :d2';
//4. prepare statement from query string
$stmt = $conn->prepare($sql);
//5. bind optional parameters
if ($status != 'ALL') $stmt->bindParam(':st', $status);
//6. bind parameters
$stmt->bindParam(':d1', $date);
$stmt->bindParam(':d2', $date1);
//7. execute statement
$stmt->execute();
//8. returns an array containing all of the result set rows
$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
//get count of rows
$numrow = count($result);
//print array - there is many solution to print array,
//to debug you can do:
print_r($result);
} catch(PDOException $e) {
echo "Error: " . $e->getMessage();
}
$conn = null;
if($numrow == 0)
echo "No results found.";
else
echo "Count: $numrow</br>";
{
echo "<table width='auto' cellpadding='1px' cellspacing='0px' border=1 align='center'>
<tr>
<th align='center'><strong>Column1</strong></th>
<th align='center'><strong>Column2</strong></th>
<th align='center'><strong>Status</strong></th>
</tr>";
foreach ($result as $row => $info) {
echo "<form action='retrieve_status_test1.php' method='post'>";
echo"<tr>"; echo "<td align='center'>" . $info['column1'] . "<input type=hidden name=column1 value=" . $info['column1'] . " </td>";
echo "<td align='center'>" . $info['column2'] . "<input type=hidden name=column2 value=" . $info['column2'] . " </td>";
echo "<td align='center'>" . $info['status'] . "<input type=hidden name=status value=" . $info['status'] . " </td>";
echo "</tr>";
echo "</form>";
}
}
echo "</table>";
?>
答案 0 :(得分：0)
只有当选项值不等于'ALL'时才向sql string中的where子句添加状态，你应该使用[参数化查询]
示例：
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDBPDO";
// check data before use it and convert from string to expected type, use try, not like here:
$status = $_POST['status'];
$date = $_POST['date'];
$date1 = $_POST['date1'];
// use valid data to select rows
try {
//1. connect to MySQL database
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
//2. set the PDO error mode to exception
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
//3. create query string (here is answer on your question)
$sql = 'SELECT column1, column2, status FROM tracker WHERE 1=1';
if ($status != 'ALL') $sql .= ' AND status = :st';
$sql .= ' AND scheduled_start_date BETWEEN :d1 AND :d2';
//4. prepare statement from query string
$stmt = $conn->prepare($sql);
//5. bind optional parameters
if ($status != 'ALL') $stmt->bindParam(':st', $status);
//6. bind parameters
$stmt->bindParam(':d1', $date);
$stmt->bindParam(':d2', $date1);
//7. execute statement
$stmt->execute();
//8. returns an array containing all of the result set rows
$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
//get count of rows
$numrow = count($result);
//print array - there is many solution to print array,
//to debug you can do:
//print_r($result);
} catch(PDOException $e) {
echo "Error: " . $e->getMessage();
}
$conn = null;
if($numrow == 0)
echo "No results found.";
else
echo "CRQ Count: $numrow</br>";
foreach ($result as $row => $info) {
echo $info['column1'] . ', ' . $info['column1'] . ', ' . $info['status'] . '; </br>';
}