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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

$GLOBALS: An associative array containing references to all variables which are currently defined in the global scope of the script. The variable names are the keys of the array

Example:

<?php
$myGlobal = "global"; // declare variable outside of scope
function test()
{
$myLocal = "local"; // declare variable inside of scope
 // both variables are printed
 var_dump($myLocal);
 var_dump($GLOBALS["myGlobal"]);
}
test(); // run function
// only $myGlobal is printed since $myLocal is not globally scoped
 
var_dump($myLocal);
var_dump($myGlobal); 
?>

Output:

string(5) "local"
string(6) "global"
NULL
string(6) "global"

In the above example $myLocal is not displayed the second time because it is declared inside the test() function and then destroyed after the function is closed.

Becoming global

To remedy this there are two options.

Option one: global keyword

function test()
{
 global $myLocal;
 $myLocal = "local";
 var_dump($myLocal);
 var_dump($GLOBALS["myGlobal"]);
}

The global keyword is a prefix on a variable that forces it to be part of the global scope.

Note that you cannot assign a value to a variable in the same statement as the global keyword. Hence, why I had to assign a value underneath. (It is possible if you remove new lines and spaces but I don't think it is neat. global $myLocal; $myLocal = "local").

Option two: $GLOBALS array

function test()
{
 $GLOBALS["myLocal"] = "local";
 $myLocal = $GLOBALS["myLocal"];
 var_dump($myLocal);
 var_dump($GLOBALS["myGlobal"]);
}

In this example I reassigned $myLocal the value of $GLOBAL["myLocal"] since I find it easier writing a variable name rather than the associative array.