wp_footer action hook generating error in my WordPress files - wordpress

Question

I am using beaver builder theme and beaver builder plugin, currently I am creating a new module my own and trying to send all my script code to footer for that my code looks like shown below:
<?php function gt_footer_script(){?>
<script>
jQuery(document).ready(function($) {
"use strict";
if ($('#gt-lightgallery_v<?php echo $gt_filter_counter; ?>').length) {
$('#gt-lightgallery_v<?php echo $gt_filter_counter; ?>').lightGallery({
selector: '.gt-gallery-box',
});
}
});
</script>
<?php } add_action('wp_footer', 'gt_footer_script');?>
my function is gt_footer_script but once I run my code it says can't re-declare function gt_footer_script its already declared on line number 110, while its first function created i am otherwise i have never used this function ever or in my current plugin but still having issue in running my code.

Answer 1

You should just check it's already loaded once. Your plugin probably loads these actions when it's called and then load again your function when it calls your module. Like :
<?php
// We check first if the function wasn't declared earlier :
if(!function_exists('gt_footer_script')) :
// Then we load it
function gt_footer_script(){
?>
<script>
jQuery(document).ready(function($) {
"use strict";
if ($('#gt-lightgallery_v<?php echo $gt_filter_counter; ?>').length) {
$('#gt-lightgallery_v<?php echo $gt_filter_counter; ?>').lightGallery({
selector: '.gt-gallery-box',
});
}
});
</script>
<?php
}
endif;
// If the function already exists, no issue to run this code :
add_action('wp_footer', 'gt_footer_script');
?>