Make layer on and off using checkboxes - leaflet

Question

I have sample of layers stored on my database, I tried to display names of this layers in a panel, each layer is associated to a checkbox. When I check each checkbow I want to add its correspondent layer on map and remove it from map when checkbox is unchecked. My problem is I can't remove layers from map.
Here is my php and jquery snippet code:
**jquery file **
$.get( $("#myForm5").attr("action"),
$("#myForm5 :input").serializeArray(),
function(data) {
$("#Liste").html(data);
$('input[id^="DisplayCheckbox"]').on('change', function()
{
var CoordItem = $(this).parents("div.parent").find("li#Lis te").text();
var content = $(this).val();
var DataItem = $(this).parents("div.parent").find("li#ListeData").text();
var array = DataItem.split(',');
var dataDomaine = $.parseJSON(CoordItem);
var geojsonFeature =
{
"type": "Feature",
"properties": {
"name": content,
},
"geometry": {
"type": dataDomaine.type,
"coordinates":dataDomaine.coordinates
}
};
var layer = L.geoJson(geojsonFeature);
if($(this).is(":checked"))
{
layer.addTo(map);
map.fitBounds(layer.getBounds());
}else
{
map.removeLayer(layer);
});//end change checkbox
});//end get function
php file
<?php
......
echo '<ul>'
echo '<div id="' . $row2['nom'] . '" class="col-sm-10 parent"><li class="Liste" id="idListe">' . $row2['nom'] . '</li>
<div class="checkbox DisplayLayer">
<label><input type="checkbox" name="id" id="DisplayCheckbox" value="' . $row2['nom'] . '"></label></div>
<li id="ListeData" name="id" style="display:none;">' . $tostring. '</li>';
.......
echo '<li id="ListeGeom" name="id" style="display:none;">' . $row3[0]. '</li></div><br/>';
echo '</ul>
?>

Answer 1

It's because you are removing "new created" feature - there is no reference to existing layer.
Before layer.addTo(map) give a layer private property, e.g layer._id = 1. And in an else block, let's iterate over all layers and try to find it by id. Something like this:
map.eachLayer(function(layer){
if(layer._id == 1) map.removeLayer(layer)
})