Howto detect if typed date is valid

Autore articolo Di Diego La Monica
Data dell'articolo 30 Agosto 2012
6 commenti su Howto detect if typed date is valid

This simple tip allow you to detect if the date is typed correctly and the date format is as expected.

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Tag date, leap year, validation

6 risposte su “Howto detect if typed date is valid”

Riddle: catch the bug.

isValidDate('30/08/2012', '/', 'dmy') == true
isValidDate('29/02/2000', '/', 'dmy') == true
isValidDate('10/10/1580', '/', 'dmy') == true
isValidDate('29/02/2001', '/', 'dmy') == false
isValidDate('10/10/1582', '/', 'dmy') == true
isValidDate('10/12/2121', '/', 'dmy') == true
isValidDate('10/10/2000', '/', 'dmy') == true

where is the function lack?

Hi Giacomo,
trying the following code:

var_dump(validaData('30/08/2012', '/', 'dmy')); # bool(true)
var_dump(validaData('29/02/2000', '/', 'dmy')); # bool(true)
var_dump(validaData('10/10/1580', '/', 'dmy')); # bool(true)
var_dump(validaData('29/02/2001', '/', 'dmy')); # bool(false)
var_dump(validaData('10/10/1582', '/', 'dmy')); # bool(true)
var_dump(validaData('10/12/2121', '/', 'dmy')); # bool(true)
var_dump(validaData('10/10/2000', '/', 'dmy')); # bool(true)

the output is as expected. So… where is the bug? :)

Think: which was the day after 4th October 1582 ?

It was the October, 5th 1582, not? :)

no, it wasn’t!
the day after 4th october, was 15th october, according to Gregorian calendar.

….but ….

…but…. there are many consideration we could do. (i.e. Swedish Reign used Giulian (Assange) calendar till 1699)

touche! :)

Thanks Giacomo! As you can notice, I’ve changed the script.

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6 risposte su “Howto detect if typed date is valid”