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Full Discussion: Problem with Date validation
Top Forums Shell Programming and Scripting Problem with Date validation Post 302100005 by sumesh.abraham on Friday 15th of December 2006 09:53:04 AM
Old 12-15-2006
Problem with Date validation
Hi All,

I've to validate a date input for the format YYYYMMDD. The input should be of 8 digits with only numeric values.

I tried the following

Code:
echo $1 | grep '^[0-9]\{8}$/p'
if [ $? -eq 0 ]
then
 echo "Valid"
else
 echo "invalid"

I get the error,

Code:
grep: RE error 16: Bad number.

Any help will be appreciated.
Thanks,
Sumesh
sumesh.abraham
 

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LEARN ABOUT PHP

dateinterval.format

DATEINTERVAL.FORMAT(3)							 1						    DATEINTERVAL.FORMAT(3)

DateInterval::format - Formats the interval

SYNOPSIS

       public string DateInterval::format (string  $format)

DESCRIPTION

	Formats the interval.

PARAMETERS

	      o $format
		-

	       The following characters are recognized in the $format parameter string. Each format character must be prefixed by a percent sign (
	      %).

	      +------------------+--------------------------------------+---+
	      |$format character |					|   |
	      | 		 |					|   |
	      | 		 |	       Description		|   |
	      | 		 |					|   |
	      | 		 |	      Example values		|   |
	      | 		 |					|   |
	      +------------------+--------------------------------------+---+
	      | 		 |					|   |
	      |        %	 |					|   |
	      | 		 |					|   |
	      | 		 |		Literal %		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |		    %			|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      |        Y	 |					|   |
	      | 		 |					|   |
	      | 		 | Years, numeric, at  least  2  digits |   |
	      | 		 | with leading 0			|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |		  01, 03		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      |        y	 |					|   |
	      | 		 |					|   |
	      | 		 |	      Years, numeric		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |		   1, 3 		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      |        M	 |					|   |
	      | 		 |					|   |
	      | 		 | Months,  numeric,  at least 2 digits |   |
	      | 		 | with leading 0			|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |		01, 03, 12		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      |        m	 |					|   |
	      | 		 |					|   |
	      | 		 |	     Months, numeric		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |		 1, 3, 12		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      |        D	 |					|   |
	      | 		 |					|   |
	      | 		 | Days, numeric,  at  least  2  digits |   |
	      | 		 | with leading 0			|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |		01, 03, 31		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      |        d	 |					|   |
	      | 		 |					|   |
	      | 		 |	      Days, numeric		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |		 1, 3, 31		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      |        a	 |					|   |
	      | 		 |					|   |
	      | 		 | Total  number of days as a result of |   |
	      | 		 | a DateTime::diff or (unknown) other- |   |
	      | 		 | wise 				|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |	       4, 18, 8123		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      |        H	 |					|   |
	      | 		 |					|   |
	      | 		 | Hours,  numeric,  at  least 2 digits |   |
	      | 		 | with leading 0			|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |		01, 03, 23		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      |        h	 |					|   |
	      | 		 |					|   |
	      | 		 |	      Hours, numeric		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |		 1, 3, 23		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      |        I	 |					|   |
	      | 		 |					|   |
	      | 		 | Minutes, numeric, at least 2  digits |   |
	      | 		 | with leading 0			|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |		01, 03, 59		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      |        i	 |					|   |
	      | 		 |					|   |
	      | 		 |	     Minutes, numeric		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |		 1, 3, 59		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      |        S	 |					|   |
	      | 		 |					|   |
	      | 		 | Seconds,  numeric, at least 2 digits |   |
	      | 		 | with leading 0			|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |		01, 03, 57		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      |        s	 |					|   |
	      | 		 |					|   |
	      | 		 |	     Seconds, numeric		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |		 1, 3, 57		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      |        R	 |					|   |
	      | 		 |					|   |
	      | 		 | Sign " -" when negative, "  +"  when |   |
	      | 		 | positive				|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |		   -, + 		|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      |        r	 |					|   |
	      | 		 |					|   |
	      | 		 | Sign  " -" when negative, empty when |   |
	      | 		 | positive				|   |
	      | 		 |					|   |
	      | 		 |					|   |
	      | 		 |		    -,			|   |
	      | 		 |					|   |
	      +------------------+--------------------------------------+---+
RETURN VALUES

	Returns the formatted interval.

NOTES

       Note

	       The DateInterval::format method does not recalculate carry over points in time strings nor  in  date  segments.	This  is  expected
	      because  it is not possible to overflow values like "32 days" which could be interpreted as anything from "1 month and 4 days" to "1
	      month and 1 day".

EXAMPLES

       Example #1

	      DateInterval example

	      <?php

	      $interval = new DateInterval('P2Y4DT6H8M');
	      echo $interval->format('%d days');

	      ?>

	      The above example will output:

	      4 days

       Example #2

	      DateInterval and carry over points

	      <?php

	      $interval = new DateInterval('P32D');
	      echo $interval->format('%d days');

	      ?>

	      The above example will output:

	      32 days

       Example #3

	      DateInterval and DateTime::diff with the %a and %d modifiers

	      <?php

	      $january = new DateTime('2010-01-01');
	      $february = new DateTime('2010-02-01');
	      $interval = $february->diff($january);

	      // %a will output the total number of days.
	      echo $interval->format('%a total days')."
";

	      // While %d will only output the number of days not already covered by the
	      // month.
	      echo $interval->format('%m month, %d days');

	      ?>

	      The above example will output:

	      31 total days
	      1 month, 0 days

SEE ALSO

       DateTime::diff.

PHP Documentation Group 												    DATEINTERVAL.FORMAT(3)
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