Call ACF field in PHP function - php

Question

I have this PHP function to add a scheduled banner to my website. I want to make it workable with ACF fields.
The function:
function holiday_site_banner() {
$from_time = new DateTime( 'get_field('banner_start_date')' );
$to_time = new DateTime( 'get_field('banner_end_date')' );
if ( new DateTime() > $from_time && new DateTime() < $to_time ) {
?><div class="site-banner">
<span>
<strong style="">ⓘ LET OP:</strong> <?php get_field('banner_message')?>
</span>
</div><?php
}
}
add_action( 'wp_footer', 'holiday_site_banner' );
I tried to use the get_field for implementing the ACF values in $from_time and $to_time but it doens't work.
I set the ACF field for this as a datepicker with output Y-m-d H:i, named [banner_start_date] and [banner_end_date].
Then I also have a ACF textarea field named [banner_message] to place in between the <span>tags as you can see which also not works.
The ACF fields are added to a custom option page created with this code:
if( function_exists('acf_add_options_page') ) {
acf_add_options_page(array(
'page_title' => 'DWD Vakantiesluiting',
'menu_title' => 'DWD Vakantie',
'menu_slug' => 'dwd-vakantiesluiting',
'capability' => 'edit_posts',
'icon_url' => 'dashicons-lock',
'redirect' => true,
'updated_message' => __("Vakantiemodus ingesteld", 'acf'),
));
}
I modified the code to this but that still doesn't work:
function scheduled_site_banner() {
// Get the start and end date values from ACF fields
$start_date = get_field('banner_start_date', 'option');
$end_date = get_field('banner_end_date', 'option');
$banner_message = get_field('banner_message', 'option');
// Create DateTime objects for the start and end date
$start_time = new DateTime($start_date);
$end_time = new DateTime($end_date);
// Format the start and end date
$formatted_start_date = date("F j, Y",strtotime($start_date));
$formatted_end_date = date("F j, Y",strtotime($end_date));
// Check if the current date and time falls between the start and end dates
if ( new DateTime() > $start_time && new DateTime() < $end_time ) {
?>
<div class="site-banner">
<span>
<strong>Important Notice:</strong> <?php echo $banner_message; ?> Our site-wide banner is scheduled to display from <?php echo $formatted_start_date ?> to <?php echo $formatted_end_date ?>
</span>
</div>
<?php
}
}
add_action( 'wp_footer', 'scheduled_site_banner' );
Also using double quotations marks in // Get the start and end date values from ACF fields doesn't work.
Is there anyone who could help me with this?
Thanks in advance!

Answer 1

I got it done, thanks for the help. The problem was the date format among some other things. I also added Europe/Amsterdam Timezone.
This is the correct code:
function scheduled_site_banner() {
// Get the start and end date values from ACF fields
$start_date = get_field("banner_start_date", "option");
$end_date = get_field("banner_end_date", "option");
$banner_message = get_field("banner_message", "option");
// Create DateTime objects for the start and end date and set Amsterdam timezone
$start_time = DateTime::createFromFormat("Y-m-d H:i:s", $start_date, new DateTimeZone('Europe/Amsterdam'));
$end_time = DateTime::createFromFormat("Y-m-d H:i:s", $end_date, new DateTimeZone('Europe/Amsterdam'));
if($start_time === false || $end_time === false) {
// date is not in correct format
return;
}
// Check if the current date and time falls between the start and end dates
if ( new DateTime('Europe/Amsterdam') > $start_time && new DateTime('Europe/Amsterdam') < $end_time ) {
?>
<div class="site-banner">
<span>
<strong>Important:</strong> <?php echo $banner_message; ?>
</span>
</div>
<?php
}
}
add_action( 'wp_footer', 'scheduled_site_banner' );
add_filter('acf/format_value', 'do_shortcode');
I also added 2 shortcodes which can be used in the message to display the start and enddates which are set in the acf fields. I used this code for that:
function register_acf_shortcodes() {
add_shortcode('begin_vakantie', 'acf_banner_start_date_shortcode');
add_shortcode('einde_vakantie', 'acf_banner_end_date_shortcode');
}
add_action( 'init', 'register_acf_shortcodes');
function acf_banner_start_date_shortcode() {
$start_date = get_field('banner_start_date', 'option');
return date('d-m-Y', strtotime($start_date));
}
function acf_banner_end_date_shortcode() {
$end_date = get_field('banner_end_date', 'option');
return date('d-m-Y', strtotime($end_date));
}
And added this filter to the function scheduled_site_banner() as you can see:
add_filter('acf/format_value', 'do_shortcode');
Last but not least I used this CSS for styling the banner and positioned it at the bottom of the page:
.site-banner {
position: fixed;
bottom: 0;
width: 100%;
background-color: #cf2e2e;
padding: 1em;
z-index: 99999;
text-align: center;
color: #ffffff;
}