How to fix display date showing empty in wordpress post - php

Question

I am editing code in template tags to show the last modified date on my WordPress website, what I mean is if I update the post, it should conditionally show update and ignore "Published", and if I do not, it should leave as is.
I got it to work, the problem I have is "Published On" appearing on all my post: http://prntscr.com/nn9hfl, this is my code so far
function chicken_wings_posted_on() {
/**
* Function to show last updated date
*/
$u_time = get_the_time('U');
$u_modified_time = get_the_modified_time('U');
if ($u_modified_time >= $u_time + 86400) {
echo '<p class = "last-updated-up">Last updated on ';
the_modified_time('F jS, Y');
echo "</p> "; }
else {
echo '<p class = "entry-date published">Published on ';
the_time('F jS, Y');
echo "</p> "; }
$time_string = sprintf( $time_string,
esc_attr( get_the_date( 'c' ) ),
esc_html( get_the_date() ),
esc_attr( get_the_modified_date( 'c' ) ),
esc_html( get_the_modified_date() )
);
$posted_on = sprintf(
/* translators: %s: post date. */
esc_html_x( 'Published on %s', 'post date', 'chicken-wings' ),
'' . $time_string . ''
);
I expect the result to be showing Updated Date only if a post is updated only
I can spot the problem is between the $posted_on = sprintf(, and I can see that is including permalink on the actual date, how do I correct the code to include the permalink in the updated date if post updated, and the actual date if not updated.
Thanks.

Answer 1

I have reformatted your code to display the post date and updated date with conditional. Also I have added correct link for the published date and also updated date. Please check following.
function chicken_wings_posted_on() {
$u_time = get_the_time('U');
$u_modified_time = get_the_modified_time('U');
if ($u_modified_time >= $u_time + 86400) {
echo '<p class="last-updated-up">Last updated on ';
echo '<a href="' . esc_url( get_day_link( get_the_modified_time( 'Y' ), get_the_modified_time( 'm' ), get_the_modified_time( 'd' ) ) ) . '">';
the_modified_time('F jS, Y');
echo '</a>';
echo "</p> ";
} else {
echo '<p class="entry-date published">Published on ';
echo '<a href="' . esc_url( get_day_link( false, false, false ) ) . '">';
the_time('F jS, Y');
echo '</a>';
echo "</p> ";
}
}