Show bi-weekly dates based on starting date

Hello Orlando,

Here is your custom source code that you need to place in your child theme’s functions.php:

add_shortcode("wpdts-regular-period", "denra_shortcode_regular_period");
function denra_shortcode_regular_period($atts, $content, $tag)
{
	# Settngs #

	// The current timestamp.
    $ts_now = current_time( 'timestamp', false );
	// The current date.
	$date_today = "2023-12-16"; //date( "Y-m-d", $ts_now);
	// The timestamp for the current date.
	$ts_today = intval( strtotime($date_today) );

	$atts_default = [
		'first_day'	=> $date_today, 	// The date you start counting.
		'period'	=> "14",			// How many days to the next regular day.
        'tag'       => 'span',  		// The default result tag attribute.
		'class'		=> '',				// CSS class, if needed.
        'format'    => get_option('date_format'),	// You may select a custom one "M j, Y"
													// More about the date and time formatting symbols on:
													// https://www.php.net/manual/en/datetime.format.php
    ];
	// Get the shortcode attributes.
	$atts = shortcode_atts( 
		$atts_default,
		$atts,
		$tag
	);

	# Calucations #
	
	// The timestamp of the date when you start counting.
	$ts_first_day = strtotime( $atts['first_day'] );	

	// The magic happens here. :)
	$ts_days_difference = $ts_today - $ts_first_day;
	$days_passed = $ts_days_difference / DAY_IN_SECONDS;
	$days_remnant = $days_passed % $atts['period'];
	$ts_period_day = $ts_today - ($days_remnant * DAY_IN_SECONDS) + $atts['period'] * DAY_IN_SECONDS;
	
    // Display the date and time in a chosen format.
    return '<' . $atts['tag'] . ($atts['class'] ? " class=\"{$atts['class']}\"" : "") . '>' . date_i18n( $atts['format'], $ts_period_day ) . '</' . $atts['tag'] . '>';
}

Then you may use the shortcode in the following way:

[wpdts-regular-period first_day="2023-12-16" period="14"]

You can also change:

• tag – the HTML tag that is used (span by default)
• format – the display format (the current WordPress date format for the website by default).
• class – if you want to add and HTML class to modify via CSS.

[wpdts-regular-period first_day="2023-12-16" period="14" tag="div" class="my_css_class" format="Y-m-d"]

Sweet! Just what I need. Thank you so much!

Orlando

I pasted some test code above by mistake. Please use the full shown below instead.

add_shortcode("wpdts-regular-period", "denra_shortcode_regular_period");
function denra_shortcode_regular_period($atts, $content, $tag)
{
	# Settngs #

	// The current timestamp.
    $ts_now = current_time( 'timestamp', false );
	// The current date.
	$date_today = date( "Y-m-d", $ts_now);
	// The timestamp for the current date.
	$ts_today = intval( strtotime($date_today) );

	$atts_default = [
		'first_day'	=> $date_today, 	// The date you start counting.
		'period'	=> "14",			// How many days to the next regular day.
        'tag'       => 'span',  		// The default result tag attribute.
		'class'		=> '',				// CSS class, if needed.
        'format'    => get_option('date_format'),	// You may select a custom one "M j, Y"
													// More about the date and time formatting symbols on:
													// https://www.php.net/manual/en/datetime.format.php
    ];
	// Get the shortcode attributes.
	$atts = shortcode_atts( 
		$atts_default,
		$atts,
		$tag
	);

	# Calucations #
	
	// The timestamp of the date when you start counting.
	$ts_first_day = strtotime( $atts['first_day'] );	

	// The magic happens here. :)
	$ts_days_difference = $ts_today - $ts_first_day;
	$days_passed = $ts_days_difference / DAY_IN_SECONDS;
	$days_remnant = $days_passed % $atts['period'];
	$ts_period_day = $ts_today - ($days_remnant * DAY_IN_SECONDS) + $atts['period'] * DAY_IN_SECONDS;
	
    // Display the date and time in a chosen format.
    return '<' . $atts['tag'] . ($atts['class'] ? " class=\"{$atts['class']}\"" : "") . '>' . date_i18n( $atts['format'], $ts_period_day ) . '</' . $atts['tag'] . '>';
}

There was a temporary test code to verify the functionality:

$date_today = "2023-12-16";

which now I changed to the current dynamic date:

$date_today = date( "Y-m-d", $ts_now);

Unfortunately I can no longer edit the first post.