Page 515 - Beginning PHP 5.3

Chapter 16: PHP and the Outside World

Format String Description
B Swatch Internet Time — a time - zone - free, decimal time measure.
See http://en.wikipedia.org/wiki/Swatch_Internet_Time
for details
d Day of the month

h Hours (in 12 - hour format)
H Hours (in 24 - hour format)
i Minutes

I 1 if DST (Daylight Saving Time) is in effect, 0 otherwise
L 1 if the date is in a leap year, 0 otherwise
M Month number (1 – 12)

s Seconds
t The number of days in the month (28, 29, 30, or 31)
U The timestamp

w The day of the week, as a number (0 is Sunday)
W The week number within the year (counting from 1)

y The year as a two - digit number
Y The year as a four - digit number
z The day number within the year (0 is January 1)

Z The offset of the computer ’ s time zone from UTC (in seconds)

As you can see, you can use idate() to retrieve all sorts of useful information from a date. Here ’ s an
example:

$d = strtotime( “February 18, 2000 7:49am” );

// Displays “The year 2000 is a leap year.”
echo “The year “ . idate( “Y”, $d );
echo “ is “ . ( idate( “L”, $d ) ? “” : “not” ) . “ a leap year. < br / > ”;

// Displays “The month in question has 29 days.”

echo “ The month in question has “ . idate( “t”, $d ) . “ days. < br / > ”;

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