Current Age shortcode

This function adds a shortcode that displays current age based on birthdate from datepicker.

/*
 * Current Age shortcode based on birthdate from datepicker. Tags: age, shortcode, datepicker
 * Use like [age date="mm/dd/yyyy"]
 */
add_shortcode( 'age', 'wppbc_calculate_age' );
function wppbc_calculate_age( $atts, $content ){
	$atts = shortcode_atts(	array(
			'date' => '',
			'format' => 'm/d/Y'
		), $atts );

	if ( wppbc_validateDate( $atts['date'], $atts['format'] ) ){
		$formated_date = DateTime::createFromFormat($atts['format'], $atts['date']);
		$to   = new DateTime('today');
		return $formated_date->diff($to)->y;
	}

	return $atts['date'];
}
function wppbc_validateDate($date, $format = 'Y-m-d H:i:s')
{
	$d = DateTime::createFromFormat($format, $date);
	return $d && $d->format($format) == $date;
}

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