blocks|key|1836993|text|我想出了这个小函数，它会检查你是否使用DD(separator)MM(sameseparator)YYYY格式|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1836994|以DD、MM和YYYY为整数。|1836995|function+valid_date($input_date)+{
++++if(!preg_match('/(?P<d>\d{2})(?P<sep>\D)(?P<m>\d{2})\2(?P<y>\d{4})/',$input_date,+$aux_date))+
++++++++return+false;+
++++$aux+=+mktime(0,0,0,$aux_date['m'],$aux_date['d'],$aux_date['y']);
++++return+$input_date+==+date('d'.$aux_date['sep'].'m'.$aux_date['sep'].'Y',$aux);
}|code-block|syntax|javascript|1836996|(按照下面的建议编辑)|1836997|entityMap^0|J|Y|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|U|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|V|8|@]|D|@]|E|$]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

I came up with this little function, it checks you use the format <code>DD(separator)MM(sameseparator)YYYY</code>

With DD, MM and YYYY as integers.

<pre><code>function valid_date($input_date) {
 if(!preg_match('/(?P&lt;d&gt;\d{2})(?P&lt;sep&gt;\D)(?P&lt;m&gt;\d{2})\2(?P&lt;y&gt;\d{4})/',$input_date, $aux_date)) 
 return false; 
 $aux = mktime(0,0,0,$aux_date['m'],$aux_date['d'],$aux_date['y']);
 return $input_date == date('d'.$aux_date['sep'].'m'.$aux_date['sep'].'Y',$aux);
}
</code></pre>

(Edited as sugested below)

blocks|key|3142296|text|$date+=+str_replace("/",+"-",+$incoming);
$d+=+explode("-"++,+$date);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3142297|重新组装零件，然后通过检查日期运行它|unstyled|3142298|if(+!checkdate($d[1],+$d[0],+$d[2])+)
echo+'Not+a+recognised+date'+;|3142299|http://www.php.net/manual/en/function.checkdate.php|offset|length|3142300|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|1F|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|V|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|W|8|@]|9|@$K|X|L|Y|1|Z]]|A|$]]|$1|M|3|-4|5|F|7|10|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|J]]]]

<pre><code>$date = str_replace("/", "-", $incoming);
$d = explode("-" , $date);
</code></pre>

Re-assemble the parts and then run it through checkdate

<pre><code>if( !checkdate($d[1], $d[0], $d[2]) )
echo 'Not a recognised date' ;
</code></pre>

<a href="http://www.php.net/manual/en/function.checkdate.php" rel="noreferrer">http://www.php.net/manual/en/function.checkdate.php</a>

blocks|key|1836949|text|我强烈推荐使用PHP方法strtotime()，因为它不仅会检查格式是否有效，还会检查格式指定的时间是否正确(即永远不会有2月31日，但正则表达式可能无法捕捉到)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1836950|您可以检查这是否对if+(strtotime($toCheck))+{有效，因为如果不成功(http://us2.php.net/strtotime)，它将返回FALSE。|1836951|EDIT:您需要先切换顺序，然后才能使用strtotime检查日期是否有效，如下所示：|BOLD|1836952|$str+=+"07-31-1987";
$str+=+preg_replace('/([%5E-\/]%2B)[-\/]([%5E-\/]%2B)[-\/]([%5E-\/]%2B)/',+'$2-$1-$3',+$str);
echo+date('r',+strtotime($str))+.+"\n";+//+Fri,+31+Jul+1987+00:00:00+-0700|code-block|syntax|javascript|1836953|entityMap|0|LINK|mutability|MUTABLE|url|http://us2.php.net/strtotime^0|C|B|0|9|Q|28|5|1A|S|0|0|0|5|K|9|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|10|8|@$9|11|A|12|B|C]|$9|13|A|14|B|C]]|D|@$9|15|A|16|1|17]]|E|$]]|$1|H|3|I|5|6|7|18|8|@$9|19|A|1A|B|J]|$9|1B|A|1C|B|C]]|D|@]|E|$]]|$1|K|3|L|5|M|7|1D|8|@]|D|@]|E|$N|O]]|$1|P|3|-4|5|6|7|1E|8|@]|D|@]|E|$]]]|Q|$R|$5|S|T|U|E|$V|W]]]]

I highly recommend using the PHP method<code>strtotime()</code>, as it will not only check to see if the format is valid, but if the time specified by the format is correct as well (i.e. there will never be a February 31st, but a regex might not catch this).

You can check to see if this is valid with <code>if (strtotime($toCheck)) {</code> as it'll return <code>FALSE</code> if it doesn't succeed (http://us2.php.net/strtotime).

EDIT:
You'll need to switch the order before you can check if the date is valid with <code>strtotime</code> first like this:

<pre><code>$str = "07-31-1987";
$str = preg_replace('/([^-\/]+)[-\/]([^-\/]+)[-\/]([^-\/]+)/', '$2-$1-$3', $str);
echo date('r', strtotime($str)) . "\n"; // Fri, 31 Jul 1987 00:00:00 -0700
</code></pre>

blocks|key|4552671|text|一种非常简单的方法是使用一个正则表达式来检查其中一种格式，然后确保通过替换任何字符首先将输入转换为该格式：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4552672|$regexDate+=+'#\d\d\-\d\d\-\d\d\d\d#'+;

$dateIn+=+trim($_GET['date'])+;

//replace+all+/+with+-+since+our+regex+expects+those
$dateIn+=+str_replace('/',+'-',+$dateIn)+;

if+(preg_match($regexDate,+$dateIn))+{
++++//valid+date+input
}|code-block|syntax|javascript|4552673|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

A very simplistic way would be to have a regular expression that checks for one of the formats, then make sure the input is converted to that first by replacing any characters:

<pre><code>$regexDate = '#\d\d\-\d\d\-\d\d\d\d#' ;

$dateIn = trim($_GET['date']) ;

//replace all / with - since our regex expects those
$dateIn = str_replace('/', '-', $dateIn) ;

if (preg_match($regexDate, $dateIn)) {
 //valid date input
}
</code></pre>

blocks|key|1088534|text|我会使用strftime和strptime。首先，我会将字符串转换为"time“，然后再转换回字符串，然后进行比较……|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1088535|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I'd use strftime and strptime. At first I'd convert string into "time" than back to string and compare it...

blocks|key|1837019|text|您可以使用datetime类，将要验证的日期传递给构造函数。如果你有一个有效的日期，你会得到一个datetime对象。如果它是一个无效的日期，构造函数将抛出一个异常，你可以捕捉它并相应地处理错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1837020|entityMap|0|LINK|mutability|MUTABLE|url|http://ca.php.net/manual/en/datetime.construct.php^0|5|8|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You could use the <a href="http://ca.php.net/manual/en/datetime.construct.php" rel="nofollow">datetime</a> class, passing the date you want to validate to the constructor. If you have a valid date you'll get back a datetime object. If it's an invalid date the constructor will throw an exception, which you can catch and the handle the error accordingly.

blocks|key|3142381|text|'/%5E(?=\d)(?:(?:(?:(?:(?:0?[13578]%7C1[02])(\/%7C-%7C\.)31)\1%7C(?:(?:0?[1,3-9]%7C1[0-2])(\/%7C-%7C\.)(?:29%7C30)\2))(?:(?:1[6-9]%7C[2-9]\d)?\d{2})%7C(?:0?2(\/%7C-%7C\.)29\3(?:(?:(?:1[6-9]%7C[2-9]\d)?(?:0[48]%7C[2468][048]%7C[13579][26])%7C(?:(?:16%7C[2468][048]%7C[3579][26])00))))%7C(?:(?:0?[1-9])%7C(?:1[0-2]))(\/%7C-%7C\.)(?:0?[1-9]%7C1\d%7C2[0-8])\4(?:(?:1[6-9]%7C[2-9]\d)?\d{2}))($%7C\+(?=\d)))?(((0?[1-9]%7C1[012])(:[0-5]\d){0,2}(\+[AP]M))%7C([01]\d%7C2[0-3])(:[0-5]\d){1,2})?$/'|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3142382|这样就可以解决问题了。|unstyled|3142383|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>'/^(?=\d)(?:(?:(?:(?:(?:0?[13578]|1[02])(\/|-|\.)31)\1|(?:(?:0?[1,3-9]|1[0-2])(\/|-|\.)(?:29|30)\2))(?:(?:1[6-9]|[2-9]\d)?\d{2})|(?:0?2(\/|-|\.)29\3(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))|(?:(?:0?[1-9])|(?:1[0-2]))(\/|-|\.)(?:0?[1-9]|1\d|2[0-8])\4(?:(?:1[6-9]|[2-9]\d)?\d{2}))($|\ (?=\d)))?(((0?[1-9]|1[012])(:[0-5]\d){0,2}(\ [AP]M))|([01]\d|2[0-3])(:[0-5]\d){1,2})?$/'
</code></pre>

This will Do the business.

blocks|key|3142155|text|由于月份中的天数不同，因此仅使用正则表达式无法验证日期-尤其是对于闰年。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3142156|/%5E(\d{1,2})(\/%7C-)(\d{1,2})\2(\d{2}%7C\d{4})$/|code-block|syntax|javascript|3142157|但是上面的regex解决了允许-或者/基于这些格式dd-mm-yyyy或dd/mm/yyyy的问题|3142158|下面是一些例子|3142159|//Date+d/m/yy+and+dd/mm/yyyy
//1/1/00+through+31/12/99+and+01/01/1900+through+31/12/2099
//Matches+invalid+dates+such+as+February+31st
'\b(0?[1-9]%7C[12][0-9]%7C3[01])[-+/.](0?[1-9]%7C1[012])[-+/.](19%7C20)?[0-9]{2}\b'

//Date+dd/mm/yyyy
//01/01/1900+through+31/12/2099
//Matches+invalid+dates+such+as+February+31st
'(0[1-9]%7C[12][0-9]%7C3[01])[-+/.](0[1-9]%7C1[012])[-+/.](19%7C20)[0-9]{2}'

//Date+m/d/y+and+mm/dd/yyyy
//1/1/99+through+12/31/99+and+01/01/1900+through+12/31/2099
//Matches+invalid+dates+such+as+February+31st
//Accepts+dashes,+spaces,+forward+slashes+and+dots+as+date+separators
'\b(0?[1-9]%7C1[012])[-+/.](0?[1-9]%7C[12][0-9]%7C3[01])[-+/.](19%7C20)?[0-9]{2}\b'

//Date+mm/dd/yyyy
//01/01/1900+through+12/31/2099
//Matches+invalid+dates+such+as+February+31st
'(0[1-9]%7C1[012])[-+/.](0[1-9]%7C[12][0-9]%7C3[01])[-+/.](19%7C20)[0-9]{2}'

//Date+yy-m-d+or+yyyy-mm-dd
//00-1-1+through+99-12-31+and+1900-01-01+through+2099-12-31
//Matches+invalid+dates+such+as+February+31st
'\b(19%7C20)?[0-9]{2}[-+/.](0?[1-9]%7C1[012])[-+/.](0?[1-9]%7C[12][0-9]%7C3[01])\b'

//Date+yyyy-mm-dd
//1900-01-01+through+2099-12-31
//Matches+invalid+dates+such+as+February+31st
'(19%7C20)[0-9]{2}[-+/.](0[1-9]%7C1[012])[-+/.](0[1-9]%7C[12][0-9]%7C3[01])'|3142160|3142161|http://www.roscripts.com/PHP_regular_expressions_examples-136.html|unordered-list-item|offset|length|3142162|3142163|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|0|0|0|1U|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|12|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|13|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|14|8|@]|9|@]|A|$E|F]]|$1|M|3|-4|5|6|7|15|8|@]|9|@]|A|$]]|$1|N|3|O|5|P|7|16|8|@]|9|@$Q|17|R|18|1|19]]|A|$]]|$1|S|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|T|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|U|$V|$5|W|X|Y|A|$Z|O]]]]

A regular expression alone cannot validate a date because of the different number of days in months - especially for leap years.

<pre><code>/^(\d{1,2})(\/|-)(\d{1,2})\2(\d{2}|\d{4})$/
</code></pre>

but above regex solves your problem of allowing - or / based on these format dd-mm-yyyy or dd/mm/yyyy

Here are some examples

<pre><code>//Date d/m/yy and dd/mm/yyyy
//1/1/00 through 31/12/99 and 01/01/1900 through 31/12/2099
//Matches invalid dates such as February 31st
'\b(0?[1-9]|[12][0-9]|3[01])[- /.](0?[1-9]|1[012])[- /.](19|20)?[0-9]{2}\b'

//Date dd/mm/yyyy
//01/01/1900 through 31/12/2099
//Matches invalid dates such as February 31st
'(0[1-9]|[12][0-9]|3[01])[- /.](0[1-9]|1[012])[- /.](19|20)[0-9]{2}'

//Date m/d/y and mm/dd/yyyy
//1/1/99 through 12/31/99 and 01/01/1900 through 12/31/2099
//Matches invalid dates such as February 31st
//Accepts dashes, spaces, forward slashes and dots as date separators
'\b(0?[1-9]|1[012])[- /.](0?[1-9]|[12][0-9]|3[01])[- /.](19|20)?[0-9]{2}\b'

//Date mm/dd/yyyy
//01/01/1900 through 12/31/2099
//Matches invalid dates such as February 31st
'(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)[0-9]{2}'

//Date yy-m-d or yyyy-mm-dd
//00-1-1 through 99-12-31 and 1900-01-01 through 2099-12-31
//Matches invalid dates such as February 31st
'\b(19|20)?[0-9]{2}[- /.](0?[1-9]|1[012])[- /.](0?[1-9]|[12][0-9]|3[01])\b'

//Date yyyy-mm-dd
//1900-01-01 through 2099-12-31
//Matches invalid dates such as February 31st
'(19|20)[0-9]{2}[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])'
</code></pre>

<ul>
<li><a href="http://www.roscripts.com/PHP_regular_expressions_examples-136.html" rel="nofollow">http://www.roscripts.com/PHP_regular_expressions_examples-136.html</a></li>
</ul>

I get dates from a text area in the dd-mm-yyyy or dd/mm/yyyy format (the user is allowed to use - or /) How do I check (using a regex or php) if the date is valid? Is there a regex or php method done this far to validate dates in this format? I tried searching here but could not find anything.

Date validation dd-mm-yyyy or dd/mm/yyyy

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我从dd-mm-yyyy或dd/mm/yyyy格式的文本区域获取日期(允许用户使用-或/)如何检查(使用regex或php)日期是否有效？到目前为止，是否有regex或php方法来验证此格式的日期？我试着在这里搜索，但什么也找不到。

问日期验证dd-mm-yyyy或dd/mm/yyyy
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回答 8

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