DATA AND TIME FUNCTIONS IN PHP

1. time() – To get current date and time information as timestamp value. Timestamp is total number of seconds from 1970 Jan 1 12:00 am

Example –

<?php

echo time();

?>

Output –

1485861862

2. date() – This function converts timestamp value as date, month and year format string.

Example –

<?php

echo date('d/m/y',time());

?>

Output –

31/01/17

Characters supported by date() –

• ·        d – 2-digit date number with leading 0.
• ·        j – A number without leading 0.
• ·        D – 3-character day name (Mon, Tue etc).
• ·        l – Full day name.
• ·        m – Month number with leading 0.
• ·        n – Month number without leading 0.
• ·        M – Month name with 3-character (Jan, Feb etc).
• ·        F – Full month name.
• ·        y – 2-digit year number.
• ·        Y – 4-digit year number.
• ·        h – 12-hour format with leading 0.
• ·        H – 24-hour format with leading 0.
• ·        g – 12-hour format without 0.
• ·        G – 24-hour format without 0.
• ·        i – Minutes.
• ·        s – Seconds.
• ·        a – Lowercase am/pm.
• ·        A – Uppercase AM/PM.
• ·        w – Day number in a week from 0 to 6.
• ·        N – Day number in a week from 1-7.
• ·        W – Number of completed weeks in current year.
• ·        e – Country date format, to get time zone of server.
• ·        P – To get GMT value of server (+01:00)

3. getdate() – To get current date and time information as array.

Example –

<?php

print_r(getdate());

?>

Output –

Array

(

    [seconds] => 22

    [minutes] => 39

    [hours] => 12

    [mday] => 31

    [wday] => 2

    [mon] => 1

    [year] => 2017

    [yday] => 30

    [weekday] => Tuesday

    [month] => January

    [0] => 1485862762

)

4. checkdate() – To check input date is existent or not.

Example –

<?php

echo checkdate(1,31,2017);

?>

Output –

1