PHP Date Exercises : Display the copyright information in the specified format

Last update on May 30 2022 11:43:15 (UTC/GMT +8 hours)

PHP date: Exercise-1 with Solution

Write a PHP script which will display the copyright information in the following format. To get current year you can use the date() function.

Sample Solution:

PHP Code:

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Copyright Information</title>
</head>
<body>
<p>© <?php echo date('Y'); ?> PHP Exercises - w3resource</p>
</body>
</html>

Sample Output:

View the output in the browser

Flowchart :

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Next: Create a simple 'birthday countdown' script, the script will count the number of days between current day and birthday.

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PHP: Tips of the Day

How to Sort Multi-dimensional Array by Value?

Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:

Example:

function sortByOrder($a, $b) {
    return $a['order'] - $b['order'];
}

usort($myArray, 'sortByOrder');

Starting in PHP 5.3, you can use an anonymous function:

usort($myArray, function($a, $b) {
    return $a['order'] - $b['order'];
});

And finally with PHP 7 you can use the spaceship operator:

usort($myArray, function($a, $b) {
    return $a['order'] <=> $b['order'];
});

To extend this to multi-dimensional sorting, reference the second/third sorting elements if the first is zero - best explained below. You can also use this for sorting on sub-elements.

usort($myArray, function($a, $b) {
    $retval = $a['order'] <=> $b['order'];
    if ($retval == 0) {
        $retval = $a['suborder'] <=> $b['suborder'];
        if ($retval == 0) {
            $retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder'];
        }
    }
    return $retval;
});

If you need to retain key associations, use uasort() - see comparison of array sorting functions in the manual

Ref : https://bit.ly/3i77vCC