How do I know if today's date is Saturday or Sunday (weekend) in PHP?

To find out if the current date is a weekend:

date( 'N' ) > 5       // hora local
gmdate( 'N' ) > 5     // GMT

• The 'N' parameter returns the days of 1 to 7 , being 1 Monday, and 7 Sunday, and runs from PHP 5.1 onwards.

• To do operations without taking into account the server's timezone , just use gmdate() instead of date() , in all examples.

Just curious, if you need the 'w' (tiny!) this is enough:

! ( date( 'w' ) % 6 )   

or even

( date( 'w' ) % 6 ) == 0

• w returns the day of the week in the range of 0 to 6 , being 0 sunday and 6 sat.

>

• The % is required because it is PHP, and the evaluation order is weird.

If you want to further simplify the 0 case, simply reverse the test:

echo date( 'w' ) % 6 ? 'Não é fim de semana' : 'é fim de semana';

See all the 6 parameters in the manual:

  

link

If you have PHP > = 5.1:

function isWeekend($date) {
    return (date('N', strtotime($date)) >= 6);
}

else:

function isWeekend($date) {
    $weekDay = date('w', strtotime($date));
    return ($weekDay == 0 || $weekDay == 6);
}

Translated from link

if (date('w') == 0 or date('w') == 6) {
    echo "É final de semana ";
}

Another way of knowing this, is catching the day in full. As in English on Saturday ( saturday ) and sunday start with the letter S , just know that.

See:

if (substr(date('D'), 0, 1) === 'S') {

   echo 'final de semana';

}

If you are using PHP 5.4, you can delete substr() and replace with [0] , known as Function array dereferencing .

Example:

if (date('D')[0] === 'S') {

   echo 'final de semana';

}

I will give my pitaco in my own answer:

in_array(date('w'), [0, 6])

In this case, w returns the day of the week in numeric format, where 0 is Sunday and 6 , Saturday.

in_array will do the job of checking if the value of the first parameter ( $needle , translating is "needle") is in the array that must be passed in the second parameter ( $haystack , which means " haystack ").

<?php
$domingo = mktime(0, 0, 0, 6, 19, 2016); // 19/6/2016
$sabado = mktime(0, 0, 0, 7, 2, 2016); // 2/7/2016
$sexta = mktime(0, 0, 0, 6, 24, 2016); // 24/6/2016

echo "Data 01 : " . (fimDeSemana($domingo) ? "fim de semana" : "dia de semana");
echo "<br/>";
echo "Data 02 : " . (fimDeSemana($sabado) ? "fim de semana" : "dia de semana");
echo "<br/>";
echo "Data 03 : " . (fimDeSemana($sexta) ? "fim de semana" : "dia de semana");


function fimDeSemana($date)
{
    return date("D", $date) === "Sat" or date("D", $date) === "Sun";
}

Output:

Data 01 : fim de semana
Data 02 : fim de semana
Data 03 : dia de semana

Using the class DateTime

$str = null;
//$str = '2016-09-24';
$dt = new DateTime($str);
$weekend = ($dt->format('w') % 6) == 0;
var_dump($weekend);