我在搜索mysql数据库的日期字段时遇到问题..我有一个html表单..允许用户选择3种不同的方式来搜索数据库..字段1是student_id，字段2是姓氏，字段3 是日期。好吧，当我运行程序并选择学生 ID 时，我得到了正确的结果，当我使用姓氏执行相同操作时，我得到了正确的结果，但是当我使用日期时......我没有得到任何返回。我碰巧知道结果应该是什么，因为我在数据库中看到它......除此之外，它的数据记录与学生 ID 和姓氏相同。我认为这可能与格式有关，但我无法弄清楚..
我不了解 aJax，所以现在请不要建议 ajax 代码。
这是 html 代码。 [代码]
-- start javascript -->
<script type="text/javascript">
/*<![CDATA[ */
function check(){
if(document.lastname.last.value == "" || document.lastname.last.value == null)
{
alert("no last name entered");
return false;
}
}
function checkdate() {
var date_regex = /^(0[1-9]|1[0-2])\/(0[1-9]|1\d|2\d|3[01])\/(19|20)\d{2}$/ ;
if(!(date_regex.test(testDate)))
{
return false;
}
}
function fieldSwap(image){
var sb = document.getElementById('sb');
if(sb.value == ""){
sb.style.background = "url(images/"+image+") no-repeat";
}
}
function buttonSwap(image){
var sb = document.getElementById('sb');
sb.src = "images/"+image;
}
function validate(){
var x = document.information.search.value;
if (x.length<10 || x.length>10){
alert("student id is incorrect");
return false;
}
}
/*]]> */
</script>
<!-- end javascript -->
</head>
<body>
<div id="form_wrap"><!-- start form wrap -->
<div id="form_header">
</div>
<div id="form_body">
<p>Search for a certification request (Enter one of the following):</p>
<form action="search.php" method="POST" name="information" id="information" onsubmit="return(validate()or return(checkdate())">
<div class="field">
<select name="type">
<option value="student_id">Student ID</option>
<option value="last_name">Last name</option>
<option value="examDate">Exam date</option>
</select>
<input name="typeValue" value="" />
<input type="submit" value="Search" />
</form>
</div>
</div>
</div><!-- end form wrap -->
</body>
</html>
<form action = "" method = "POST">
<div class="field">
<label for = "first_name"> first_name</label>
<input type = "text" name = "first_name" id = "first_name">
</div>
<div class = "field">
<label for = "last_name"> last_name </label>
<input type ="text" name = "last_name" id = "last_name">
</div>
<div class = "field">
<label for = "bio"> bio </label>
<textarea name = "bio" id = "bio"></textarea>
</div>
<input type = "submit" value = "Insert">
</form>
[/代码]
这是 PHP 代码
[代码]
$records = array();
$typeValue = $_REQUEST['typeValue'];
//If they did not enter a search term we give them an error
if ($typeValue == "")
{
echo "<p>You forgot to enter a search term!!!";
exit;
}
// We perform a bit of filtering
//$typevalue = strtoupper($search);
$typeValue = strip_tags($typeValue);
$typeValue = trim ($typeValue);
$value = $_POST['typeValue'];
if($_POST['type'] == "student_id")
{
//Query with $value on student_id
if($result = $db->query("SELECT * FROM records WHERE student_id LIKE '$typeValue'" )){
if($result->num_rows){
while($row = $result->fetch_object()){
$records[] = $row;
}
$result->free();
}
}
}
elseif($_POST['type'] == "last_name")
{
//Query with $value on last_name
if($result = $db->query("SELECT * FROM records WHERE last_name LIKE '$typeValue'" )){
if($result->num_rows){
while($row = $result->fetch_object()){
$records[] = $row;
}
$result->free();
}
}
}
elseif($_POST['type'] == "examDate")
{
//Query with $value on date
if($result = $db->query("SELECT * FROM records WHERE examDate LIKE '$typeValue'" )){
if($result->num_rows){
while($row = $result->fetch_object()){
$records[] = $row;
}
$result->free();
}
}
}
//This counts the number or results - and if there wasn't any it gives them a little message explaining that
//$anymatches=$result;
//if ($anymatches == 0 )
//{
//echo "Sorry, but we can not find an entry to match your query...<br><br>";
//}
//And we remind them what they searched for
//echo "<b>Results For:</b> " .$typeValue;
//}
?>
<!DOCTYPE html>
<html>
<style type="text/css">
th{text-align: left;}
table, th, td{ border: 1px solid black;}
</style>
<head>
<title>Search Result</title>
</head>
<body>
<h3> Results for <?php echo $typeValue ?> </h3>
<?php
if(!count($records)) {
echo 'No records';
} else {
?>
<table style="width:100%">>
<th>
<tr>
<th>student_id</th>
<th>First name</th>
<th>Last name</th>
<th>email</th>
<th>Major</th>
<th>Exam Name</th>
<th>Taken class</th>
<th>Prepare</th>
<th>MeasureUp Key</th>
<th>Exam Date</th>
<th>Request Made On</th>
</tr>
</thead>
<tbody>
<?php
foreach($records as $r){
?>
<tr>
<td><?php echo $r->student_id; ?></td>
<td><?php echo $r->first_name; ?></td>
<td><?php echo $r->last_name; ?></td>
<td><?php echo $r->email; ?></td>
<td><?php echo $r->major; ?></td>
<td><?php echo $r->examName?></td>
<td><?php echo $r->taken_class; ?></td>
<td><?php echo $r->prepare; ?></td>
<td><?php echo $r->measureUpKey; ?></td>
<td><?php echo $r->examDate; ?></td>
<td><?php echo $r->request_made; ?></td>
</tr>
<?php
}
?>
</tbody>
</table>
<?php
}
?>
</html>
<html>
<head></head>
<body>
<br/>
<a href="query.html">Return to Search </a>
</body>
</html>
[/代码]
最佳答案
我相信您正在使用类似的方法来获取该 session 或月份的考试日期，以便您可以使用它 使用DATE_FORMAT功能
SELECT * FROM records WHERE DATE_FORMAT(examDate, '%Y %m') = DATE_FORMAT('$typeValue', '%Y %m') ORDER BY examDate
或者您可能正在寻找特定日期
SELECT * FROM records WHERE examDate = '$typeValue'
关于php - 如何使用 php - mysqli 搜索日期字段，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/25965127/