日期在一个形式和验证 [英] Date in a form and validate
问题描述
所以基本上一个文件是form.php和我必须以dd / mm / yy编写当前服务器的日期，用户可以编辑它。日期应以表单格式显示，例如在网页浏览器上应该出现日期：[23/9/2012]。
，而另一个文件即为进程.php我必须验证日期。
所以对于我的form.php这是我到目前为止写的：
< html>
< body>
<？php
if（isset（$ _POST [date]））{
$ date = date（d / m / y（$ _ POST [date] ））;
echo $ date;
}
？>
< form action =form.phpmethod =POST>
日期：< input type =textname =datevalue =Date/>
< / form>
< / body>
< / html>
日期在网络浏览器上显示的内容只是日期：[日期]不是日期。
您可以使用正则表达式执行此操作：
<？php
if（isset（$ _ POST ['date']）&&！空（$ _ POST ['date ']））{
$ date = trim（$ _ POST ['date']）;
}
$ regex ='/ ^（（（[1-2] [0-9]）|（[1-9]））/（[2]）/ 0-9] {4}）|（（（[1-2] [0-9]）|（[1-9]）|（3 [0-1]））/（（1 [0-2] ）|（[3-9]）|（[1]））/ [0-9] {4}）$ /';
if（preg_match（$ regex，$ date））{
$ disp_date = $ date;
//更新db
$ error =''中的日期
}
else {
$ error ='无效的日期格式< br />';
//从db
$ disp_date = $ date_from_db获取最后一个日期
}
？>
<？= $ error？>
< form action =method =POST>
< input type =textvalue =<？= $ disp_date？> name =date/>
< input type =submitvalue =提交日期/>
< / form>
正则表达式如何工作：
DD / MM / YYYY：
DD必须为1-31，MM 1-12，YYYY为4位数字。
编辑：修复了二月的问题。
I am a little stuck here how to write a code for current date of the server and validate them.
So basically on one file is the form.php and i have to write the code for current date of the server in dd/mm/yy and this can be edited by the user. The date should appear in a form format for example on the web browser should appear date: [23/9/2012].
and on the other file which is the process.php I have to validate the date.
so for my form.php this is what i wrote so far:
<html>
<body>
<?php
if (isset ($_POST["date"])){
$date = date("d/m/y"($_POST["date"]));
echo $date;
}
?>
<form action="form.php" method="POST">
Date: <input type="text" name="date" value="Date" />
</form>
</body>
</html>
what it appear on the web browser for date is only date:[date] just the word date but not the date. I've been stuck for an hour for this.
You can do this with a regex:
<?php
if (isset($_POST['date']) && !empty($_POST['date'])) {
$date = trim($_POST['date']);
}
$regex = '/^((([1-2][0-9])|([1-9]))/([2])/[0-9]{4})|((([1-2][0-9])|([1-9])|(3[0-1]))/((1[0-2])|([3-9])|([1]))/[0-9]{4})$/';
if (preg_match($regex, $date)) {
$disp_date = $date;
//update the date in db
$error = '';
}
else {
$error = 'Invalid date format<br />';
//get last date from db
$disp_date = $date_from_db;
}
?>
<?=$error?>
<form action="" method="POST">
<input type="text" value="<?=$disp_date?>" name="date" />
<input type="submit" value="Submit Date" />
</form>
How the regex works: DD/MM/YYYY: DD must be 1-31, MM 1-12 and YYYY a 4 digit num.
Edit: Fixed the problem with February.
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