Category : PHP

A list of PHP dateTime method date and time formatting option

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PHP dateTime formatting list for reference.

  • d – The day of the month (from 01 to 31)
  • D – A textual representation of a day (three letters)
  • j – The day of the month without leading zeros (1 to 31)
  • l (lowercase ‘L’) – A full textual representation of a day
  • N – The ISO-8601 numeric representation of a day (1 for Monday, 7 for Sunday)
  • S – The English ordinal suffix for the day of the month (2 characters st, nd, rd or th. Works well with j)
  • w – A numeric representation of the day (0 for Sunday, 6 for Saturday)
  • z – The day of the year (from 0 through 365)
  • W – The ISO-8601 week number of year (weeks starting on Monday)
  • F – A full textual representation of a month (January through December)
  • m – A numeric representation of a month (from 01 to 12)
  • M – A short textual representation of a month (three letters)
  • n – A numeric representation of a month, without leading zeros (1 to 12)
  • t – The number of days in the given month
  • L – Whether it’s a leap year (1 if it is a leap year, 0 otherwise)
  • o – The ISO-8601 year number
  • Y – A four digit representation of a year
  • y – A two digit representation of a year
  • a – Lowercase am or pm
  • A – Uppercase AM or PM
  • B – Swatch Internet time (000 to 999)
  • g – 12-hour format of an hour (1 to 12)
  • G – 24-hour format of an hour (0 to 23)
  • h – 12-hour format of an hour (01 to 12)
  • H – 24-hour format of an hour (00 to 23)
  • i – Minutes with leading zeros (00 to 59)
  • s – Seconds, with leading zeros (00 to 59)
  • u – Microseconds (added in PHP 5.2.2)
  • e – The timezone identifier (Examples: UTC, GMT, Atlantic/Azores)
  • I (capital i) – Whether the date is in daylights savings time (1 if Daylight Savings Time, 0 otherwise)
  • O – Difference to Greenwich time (GMT) in hours (Example: +0100)
  • P – Difference to Greenwich time (GMT) in hours:minutes (added in PHP 5.1.3)
  • T – Timezone abbreviations (Examples: EST, MDT)
  • Z – Timezone offset in seconds. The offset for timezones west of UTC is negative (-43200 to 50400)
  • c – The ISO-8601 date (e.g. 2013-05-05T16:34:42+00:00)
  • r – The RFC 2822 formatted date (e.g. Fri, 12 Apr 2013 12:01:05 +0200)
  • U – The seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)
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Rounding up and rounding out numbers with PHP functions

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Some PHP functions to round numbers up and out, with examples.

// Round "up" method
// Rounds up to the specified number of decimal places
function roundUp ($value, $places=0) {
  if ($places < 0) { $places = 0; }
  $mult = pow(10, $places);
  return ceil($value * $mult) / $mult;
}

// Round "out" method
// rounds a float away from zero to a specified number of decimal places
function roundOut ($value, $places=0) {
  if ($places < 0) { $places = 0; }
  $mult = pow(10, $places);
  return ($value >= 0 ? ceil($value * $mult):floor($value * $mult)) / $mult;
}

echo roundUp (56.77001, 2); // displays 56.78
echo roundUp (-0.453001, 4); // displays -0.453
echo roundOut (56.77001, 2); // displays 56.78
echo roundOut (-0.453001, 4); // displays -0.4531

 

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Count the number of days between two dates – PHP

How to count the number of days in between two dates using PHP and the dateTime function.

$date_1 = new DateTime($start_date);
$date_2 = new DateTime($finish_date);
$days= $date_2->diff($date_1)->format("%a");

 

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Setting a cookie value immediately – PHP

The way to set a cookie:

setcookie("COOKIE NAME", "COOKIE VALUE", time() + 3600 * 8 * 7);

This cookie will be in place when the page next refreshes/loads;

To work with an immediate value of the cookie, add this as well:

$_COOKIE['COOKIE NAME']= COOKIE VALUE;
setcookie("COOKIE NAME", "COOKIE VALUE", time() + 3600 * 8 * 7);

Using the above method will shove the value of the cookie into the session variable version, as well as writing it where it should be ready for a page reload.

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