CODEWITHSUNDEEP
phpdatedatetime
Spialdor
Spialdor

Reputation: 1645

Check if date have a specific format

I need to check if a date have a format to save it or no, I use the function strptime() :

if (!strptime($contact[14], '%Y') && isset($contact[14]) && $contact[14] != ""){
      $date_naissance =  $contact[14];
      dsm("BON FORMAT : ".$contact[14]);
    } else {
      $date_naissance = null;
      dsm("MAUVAIS FORMAT : ".$contact[14]);
    }

The problem is that the format seems not working, i need to validate all date with format year (like this : 2010, 2020, ..) but they are not validate, I don't understand why, in the php date documentation the Y is for a 4 digit year representation.

Anyone have an idea ?

Edit : with CreateFromFormat :

if(DateTime::createFromFormat('Y', $contact[22])){
      dsm("Bon format : ".$contact[22]);
      $date_derniere_inscription = strtotime($contact[22]);
    } else {
      $date_derniere_inscription = null;
    }

But the date with only two digits and even the date with 0 value are validated too.

The 'Y' format seems doesn't work, with all the values (for example, 2012 but also 96 or 0) it create a date, with a 0 value it create '0000-07-11 10:38:45.000000' .. what is wrong with this format ?

Upvotes: 0

Views: 281

Answers (2)

Joppe De Cuyper
Joppe De Cuyper

Reputation: 414

You can use a simple regular expression to do this.

/(\d{4})/

Sample code:

<?php
$pattern = "/(\d{4})/";
$year = "2015";
if(preg_match($pattern, $year)){
    echo "Format correct!";
} else{
    echo "Format incorrect!";
}
?>

For more information on regex, check the PHP Manual and the REGEX Builder & Tester

Upvotes: 0

Lovepreet Singh
Lovepreet Singh

Reputation: 4840

createFromFormat can help in this case. It will return false if given date string will not in given format.

$date = DateTime::createFromFormat('Y-m-d', '11-Jan-2018');

if ($date) {
    echo 'In format';
} else {
    echo 'Not in format';
}

For resetting all fields (Month, day, Minutes, seconds) except year, you can use:

$date = DateTime::createFromFormat('Y|', '2012');

And output will be: 2012-01-01 00:00:00.000000. Can be converted to any format using format() function.

Upvotes: 2

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