如何从HTML5输入类型=“日期”中获取日期值
[英]How to get the Date value from HTML5 input type=“date”
问题描述
This is the user interface where user chooses the fromdate and todate from the form. 
这是用户界面，用户可以从中选择表单的fromdate和todate日期。
<html> <form name="frmSearch" method="post" action="searchdate2.php"> <label> From date </label> <input type="date" name="fromdate" /> <label> To date</label> <input type="date" name="todate" /> <input type="submit" name="go" value="Search"> </form>
Then in searchdate2.php, I am trying to display the result with matching date range from mysql 然后在searchdate2.php中，我试图显示与mysql匹配的日期范围的结果
include('connect-db.php');
$result = mysqli_query("SELECT * FROM treatmentdetail
WHERE nextdate BETWEEN '" . $_POST['fromdate'] . "' AND '" .
$_POST['todate'] . "'");
while($row = mysqli_fetch_array( $result ,MYSQL_ASSOC)) {
echo "<tr>";
echo '<td width="100px">' . $row['id'] . '</td>';
echo '<td width="200px">' . $row['patientid'] . '</td>';
echo '<td width="200px">' . $row['treatmentid'] . '</td>';
}
echo "</tr>";
echo "</table>";
?>
I'm trying to figure out how to get the Date value using HTML5 input type="date", 我试图弄清楚如何使用HTML5输入type =“ date”获取Date值，
Can I do it in PHP or JQuery? 我可以用PHP或JQuery做到吗？
2 个解决方案
解决方案1
1 2017-08-05 13:59:57
Can I do it in PHP or JQuery?
In JavaScript, on the browser, you can get it from the valueAsDate property : 在JavaScript的浏览器中，您可以从valueAsDate属性获取它：
// Without jQuery:
console.log(document.querySelector("input[name=fromdate]).valueAsDate);
// With jQuery:
console.log($("input[name=fromdate])[0].prop("valueAsDate"));
To access it from PHP, you'll need to submit the form and get the string value from $_GET or $_POST (as appropriate) and parse it. 要从PHP访问它，您需要提交表单并从$_GET或$_POST （根据需要）获取字符串值并进行解析。
解决方案2
1 2017-08-05 15:31:26
BETWEEN SQL operator works with numeric values... You are giving it strings. BETWEEN SQL运算符之间使用数字值...您正在为其提供字符串。
I suggest you use the > and < operators, which works with strings: 我建议您使用>和<运算符，它们适用于字符串：
$result = mysqli_query("SELECT * FROM treatmentdetail WHERE nextdate > '" . $_POST['fromdate'] . "' AND nextdate < '" . $_POST['todate'] . "'");
EDIT
编辑
From your last comment ( «if i have 2017-7-1 in the db...» ), I think I caught your actual problem. 从您的最后一条评论（ «如果我在数据库中有2017-7-1 ...» ），我想我发现了您的实际问题。
The HTML <input type="date"> returns the leading zeros. HTML <input type="date">返回前导零。
And the leading zeros are missing on month and date in your database. 并且数据库中月份和日期的前导零均缺失 。
You are a human, you don't need the leading zero to understand that "2017-7-1" is the same date as "2017-07-01". 您是人类，不需要前导零即可了解“ 2017-7-1”与“ 2017-07-01”是同一日期。
But a machine doesn't agree on that. 但是机器对此并不认同。
To it, those aren't dates... Those are string. 到目前为止，这些不是日期，而是字符串。 And the first is a greater value because 7 is greater than 0 at character position 5. 第一个是一个较大的值，因为在字符位置5处7大于0 。
"abcde" is greater than "aaabc" “ abcde”大于“ aaabc”
"12345" is greater than "11123". “ 12345”大于“ 11123”。
See here: 看这里：
date_db = "2017-7-1"; date_post="2017-07-01"; greater = (date_db > date_post); equal = (date_db == date_post); smaller = (date_db < date_post); console.log(greater); console.log(equal); console.log(smaller);
I would fix my database data. 我会修复我的数据库数据。
You just need to clean it once to avoid some complicated scripts that you would need to walk around some malformed data. 您只需要清理一次即可避免一些复杂的脚本，这些脚本需要处理一些格式错误的数据。
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