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markl999
PostPosted: Tue Oct 21, 2003 11:17 am 
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Joined: Thu Oct 16, 2003 5:49 pm
Posts: 1972
Location: Manchester (UK)
To check a date is entered in YYYY-MM-DD format.
Syntax: [ Download ] [ Hide ]
 
if(preg_match('/^[0-9]{4}-[0-9]{2}-[0-9]{2}$/', $datein)){
    //it's ok
}else{
    //it's bad
}
 

This only checks the format and not the validity. E.g. 2003-09-31 will pass the check even though September doesn't have 31 days.


Last edited by feyd on Fri Aug 01, 2008 10:04 am, edited 1 time in total.
fix php tags.


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jason
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PostPosted: Tue Oct 21, 2003 11:32 am 
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Posts: 1767
Location: Montreal, CA
A little extension to this.

Syntax: [ Download ] [ Hide ]
$datein = '1998-09-21';
if(preg_match('/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])$/', $datein)){
    echo 'go';
}else{
    echo 'no go';
}


Makes sure things like 1998-13-32 won't get past and validate.


Last edited by feyd on Fri Aug 01, 2008 10:04 am, edited 1 time in total.
fix php tags.


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evilMind
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PostPosted: Tue Oct 21, 2003 12:16 pm 
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Joined: Fri Sep 19, 2003 10:09 am
Posts: 145
Location: Earth
alternative, with validation:
Syntax: [ Download ] [ Hide ]
 
function MyCheckDate( $postedDate ) {
   if ( ereg("^[0-9]{4}-[01][0-9]-[0-3][0-9]$",$postedDate) ) {
      list( $year , $month , $day ) = explode('-',$postedDate);
      return( checkdate( $month , $day , $year ) );
   } else {
      return( false );
   }
}
 


Check
for a breakdown of the ereg


Last edited by feyd on Fri Aug 01, 2008 10:03 am, edited 1 time in total.
fix php tags.


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jason
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PostPosted: Tue Oct 21, 2003 12:27 pm 
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Posts: 1767
Location: Montreal, CA
Of course, anyone can simply replace the pregular expression from above with the ereg and get the same result with the function resulting in this:

Syntax: [ Download ] [ Hide ]
 
function MyCheckDate( $postedDate ) {
   if ( preg_match('/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])$/', $postedDate) ) {
      list($year , $month , $day) = explode('-',$postedDate);
      return checkdate($month , $day , $year);
   } else {
      return false;
   }
}
 


Last edited by feyd on Fri Aug 01, 2008 10:03 am, edited 1 time in total.
fix php tags.


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fastfingertips
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PostPosted: Sat Jan 03, 2004 3:35 am 
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Joined: Sun Dec 28, 2003 2:40 am
Posts: 242


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redmonkey
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PostPosted: Sun Jan 04, 2004 4:36 pm 
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Joined: Thu Dec 18, 2003 4:58 pm
Posts: 836


Last edited by feyd on Fri Aug 01, 2008 10:03 am, edited 1 time in total.
fix php tags.


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volomike
PostPosted: Fri Jun 27, 2008 6:47 pm 
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Joined: Wed Jan 16, 2008 10:04 am
Posts: 633
Location: Myrtle Beach, South Carolina, USA


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matthijs
PostPosted: Thu Jul 03, 2008 2:26 am 
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Joined: Thu Oct 06, 2005 3:57 pm
Posts: 3360
What is $xadBits and were is it coming from? And what does checkdate look like?
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volomike
PostPosted: Thu Jul 03, 2008 3:20 am 
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syntia19
PostPosted: Mon Sep 19, 2011 3:00 am 
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Joined: Mon Sep 19, 2011 2:58 am
Posts: 1
Hi,
thank you, exactly what I'm looking for!
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Shirlee
PostPosted: Mon Jan 09, 2012 10:43 am 
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Joined: Mon Jan 09, 2012 10:23 am
Posts: 1
Thank you very much!
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TammaraBb1
PostPosted: Wed Oct 15, 2014 8:55 am 
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Joined: Wed Oct 15, 2014 1:49 am
Posts: 2
Take note of the format guys. Most of us missed it.
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