Gravity form After Submit PDF Download

add_action( 'gform_after_submission_12', 'after_submission', 10, 2 );
function after_submission($form) {
$get_entry_data =  rgar( $form, '9' );
if(rgar($form, '9')=='1721'){
echo "<script>
var link = document.createElement('a');
link.href = '/wp-content/uploads/2020/08/eBook-Cellular-Failover.pdf';
link.download = 'download';
link.target = '_blank';
link.dispatchEvent(new MouseEvent('click'));
</script>";
}elseif(rgar($form, '9')=='1708'){
echo "<script>
var link = document.createElement('a');
link.href = '/wp-content/uploads/2020/08/eBook-Definitive-Guide-to-ZTP.pdf';
link.download = 'download';
link.target = '_blank';
link.dispatchEvent(new MouseEvent('click'));
</script>";
}
elseif(rgar($form, '9')=='1675'){
echo "<script>
var link = document.createElement('a');
link.href = '/wp-content/uploads/2020/08/GGE-OOB.pdf';
link.download = 'download';
link.target = '_blank';
link.dispatchEvent(new MouseEvent('click'));
</script>";
}
elseif(rgar($form, '9')=='1686'){
echo "<script>
var link = document.createElement('a');
link.href = '/wp-content/uploads/2020/08/eBook-Enterprise-Networking-Survival-Guide.pdf';
link.download = 'download';
link.target = '_blank';
link.dispatchEvent(new MouseEvent('click'));
</script>";
}
elseif(rgar($form, '9')=='1693'){
echo "<script>
var link = document.createElement('a');
link.href = '/wp-content/uploads/2020/08/eBook-Evolve-with-SD-Branch-to-Solve-Three-Major-SD-WAN-Problems.pdf';
link.download = 'download';
link.target = '_blank';
link.dispatchEvent(new MouseEvent('click'));
</script>";
}
elseif(rgar($form, '9')=='1699'){
echo "<script>
var link = document.createElement('a');
link.href = '/wp-content/uploads/2020/08/eBook-How-Automation-is-Transforming-the-Datacenter-Landscape.pdf';
link.download = 'download';
link.target = '_blank';
link.dispatchEvent(new MouseEvent('click'));
</script>";
}
}