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PHP Date - Exercises, Practice, Solution

PHP date [28 exercises with solution]

1. Write a PHP script which will display the copyright information in the following format. To get current year you can use the date() function. Go to the editor
Expected Format : © 2013 PHP Exercises - w3resource
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2. Create a simple 'birthday countdown' script, the script will count the number of days between current day and birthday. Go to the editor
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3. Write a PHP script to print the current date in the following format. To get current date's information you can use the date() function. Go to the editor
Sample format : (assume current date is September 01, 2013)
2013/09/01
13.09.01
01-09-13
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4. Write a PHP script to calculate the difference between two dates. Go to the editor
Sample dates : 1981-11-04, 2013-09-04
Expected Result : 31 years, 10 months, 11 days
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5. Write a PHP script to convert a date from yyyy-mm-dd to dd-mm-yyyy. Go to the editor
Sample date : 2012-09-12
Expected Result : 12-09-2012
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6. Write a PHP script to convert the date to timestamp. Go to the editor
Sample date : 12-05-2014
Expected Result : 1399852800

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7. Write a PHP script to calculate a number of days between two dates. Go to the editor
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8. Write a PHP script to get the first and last day of a month from a specified date. Go to the editor
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9. Write a PHP script to print like : Saturday the 7th. Go to the editor
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10. Write a PHP script to check whether the given dates are valid or not? Go to the editor
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11. Write a PHP script to get time difference in days and years, months, days, hours, minutes, seconds between two dates. Go to the editor
Note : Use DateTime class.
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12. Write a PHP script to change month number to month name. Go to the editor
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13. Write a PHP script to get yesterday's date. Go to the editor
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14. Write a PHP script to get the current date/time of 'Australia/Melbourne'. Go to the editor
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15. Write a PHP script to check whether a date is a weekend or not. Go to the editor
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16. Write a PHP script to add/subtract the number of days from a particular date. Go to the editor
Sample Output : Original date : 2011-01-01
Before 40 days : 2010-11-22
After 40 days : 2011-02-10
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17. Write a PHP function to get start and end date of a week (by week number) of a particular year. Go to the editor
Sample week and year : 12, 2014
Output :
Starting date of the week: 2014-3-24
End date the week: 2014-3-30
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18. Write a PHP script to calculate the current age of a person. Go to the editor
Sample date of birth : 11.4.1987
Output : Your age : 27 years, 1 month, 29 days
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19. Write a PHP script to calculate weeks between two dates. Go to the editor
Sample Output : Weeks between 1/1/2014 and 12/31/2014 is 52
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20. Write a PHP script to get the number of the month before the current month. Go to the editor
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21. Write a PHP script to convert seconds into days, hours, minutes and seconds. Go to the editor
Sample seconds : 200000
Expected output : 2 days, 7 hours, 33 minutes and 20 second
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22. Write a PHP script to get the last 6 months from the current month. Go to the editor
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23. Write a PHP script to get the current month and previous three months. Go to the editor
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24. Write a PHP script to increment date by one month Go to the editor
Sample date : 2012-12-21
Expected Output : 2013-01-21
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25. Write a PHP script to get the current date in Italian. Go to the editor
Sample Output : Today is lun on ott 06, 2014
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26. Write a PHP script to convert the number to month name. Go to the editor
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27. Write a PHP script to get the number of days of the current month. Go to the editor
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28. Write a PHP script to display time in a specified timezone. Go to the editor
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PHP Code Editor:

More to Come !

Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page.



PHP: Tips of the Day

Members of objects or classes can be accessed using the object operator (->) and the class operator (::).

Example:

class MyClass {
 public $a = 1;
 public static $b = 2;
 const C = 3;
 public function d() { return 4; }
 public static function e() { return 5; }
}
$object = new MyClass();
var_dump($object->a); // int(1)
var_dump($object::$b); // int(2)
var_dump($object::C); // int(3)
var_dump(MyClass::$b); // int(2)
var_dump(MyClass::C); // int(3)
var_dump($object->d()); // int(4)
var_dump($object::d()); // int(4)
var_dump(MyClass::e()); // int(5)
$classname = "MyClass"; 
var_dump($classname::e()); // also works! int(5)

Note that after the object operator, the $ should not be written ($object->a instead of $object->$a). For the class operator, this is not the case and the $ is necessary. For a constant defined in the class, the $ is never used.

Also note that var_dump(MyClass::d()); is only allowed if the function d() does not reference the object:

class MyClass {
 private $a = 1;
 public function d() {
 return $this->a;
 }
}
$object = new MyClass();
var_dump(MyClass::d()); // Error!

This causes a 'PHP Fatal error: Uncaught Error: Using $this when not in object context'

These operators have left associativity, which can be used for 'chaining':

class MyClass {
 private $a = 1;

 public function add(int $a) {
 $this->a += $a;
 return $this;
 }

 public function get() {
 return $this->a;
 }
}
$object = new MyClass();
var_dump($object->add(4)->get()); // int(5)

These operators have the highest precedence (they are not even mentioned in the manual), even higher that clone. Thus:

class MyClass {
 private $a = 0;
 public function add(int $a) {
 $this->a += $a;
 return $this;
 }
 public function get() {
 return $this->a;
 }
}
$o1 = new MyClass();
$o2 = clone $o1->add(2);
var_dump($o1->get()); // int(2)
var_dump($o2->get()); // int(2)

The value of $o1 is added to before the object is cloned!

Note that using parentheses to influence precedence did not work in PHP version 5 and older (it does in PHP 7):

// using the class MyClass from the previous code
$o1 = new MyClass();
$o2 = (clone $o1)->add(2); // Error in PHP 5 and before, fine in PHP 7
var_dump($o1->get()); // int(0) in PHP 7
var_dump($o2->get()); // int(2) in PHP 7