Delete ACF Field from the backend with expired date - php

Question

I have an ACF field called sub seminars, inside this is another field called sub seminars which is a repeater field containing start_date and end_date.
I have posts that have several rows of this field.
I want to delete the row of the repeater field which has an expired date in it from the backend so that it doesn't show up in the front end.
I am using this function to achieve this but somethings are not working.
add_filter('acf/load_value/name=repeater_field_name', 'delete_old_courses_by_date');
function delete_old_courses_by_date($rows, $post_id, $field) {
if (!is_array($value) || !count($value)) {
return $value;
}
// get the current timestamp
$now = time();
// set up a new array to hold the values we keep
$new_value = array();
foreach ($rows as $row) {
// the php strtotime() function could fail depending on
// the return format of the date/time fields
// this requires a valid date/time format as documented here
// http://php.net/manual/en/datetime.formats.php
// if this does not work I probably won't be much help figuring
// our how to covert your return value to something usable
$start = strtotime($row['start_date']);
$end = strtotime($row['end_date']);
if ($start > $now || $end > $now) {
$new_value[] = $row;
}
}
return $new_value;
}
If I put repeater_field_name as start_date, all the start_date rows are deleted.
Please not my date format is Ymd and I don't know if the format is compatible with strtotime() function
Any help would be really appreciated.

Answer 1

This is what finally worked for me
<?php for($i=0;$i<10;$i++){
$ap = get_post_meta($post->ID,'sub_seminars_'.$i.'_start_date',true);
$startdate = date("Ymd", strtotime($ap));
$todaydate = date("Ymd");
if(strtotime($todaydate) > strtotime($startdate) && !empty($ap)){
$del_data = array(
'Ref' => 'sub_seminars_'.$i.'_ref',
'Start date' => 'sub_seminars_'.$i.'_start_date',
'End Date' => 'sub_seminars_'.$i.'_end_date',
'Venue' => 'sub_seminars_'.$i.'_venue',
'Fees' => 'sub_seminars_'.$i.'_fees',
'CPE Credits' => 'sub_seminars_'.$i.'_cpe_credits'
);
delete_row('sub_seminars', 1);
}
} ?>
Hope this helps to someone else.