PHP Ajax form controller Jquery

form-submit-jquery.js

$(function () {
    $.notifyDefaults({
        placement: {from: "top", align: "center"},
        animate: {enter: "animated fadeInUp", exit: "animated fadeOutDown"}
    });
    $('body').on('submit', 'form', function (e) {
        e.preventDefault();
        $('button[type=submit]').attr('disabled', true);
        var data = new FormData($(this)[0]);
        var form_url = $(this).attr('action');
        if ($('[name=_method]').val() == "POST") {
            var mest = 'created';
        } else {
            var mest = 'updated';
        }
        $.ajax({
            url: form_url,
            type: 'POST',
            data: data,
            dataType: 'json',
            async: true,
            cache: false,
            contentType: false,
            processData: false,
            success: function (res) {
                console.log(res);
                if (res.success) {
                    $.notify({
                        title: '<strong>Success!</strong>',
                        message: 'Record has been ' + mest + ' successfully.'
                    }, {type: 'success'});
                    setTimeout(function () {
                        location.reload();
                    }, 500);
                } else {
                    if (res.error) {
                        showError(res.error);
                    }
                    $('button[type=submit]').attr('disabled', false);
                }
            },
            error: function (res) {
                $.notify({
                    title: '<strong>Sorry!</strong>',
                    message: 'Record has not been ' + mest + '.'
                }, {type: 'danger'});
                $('button[type=submit]').attr('disabled', false);
            }
        });
    });
    $('.btn-delete').click(function (e) {
        e.preventDefault();
        var url = $(this).attr('href');
        var r = confirm("Do you want to delete this record?");
        if (r == true) {
            $.ajax({
                url: url, type: 'POST', dataType: 'json', success: function (e) {
                    if (e.success) {
                        $.notify({title: '<strong>Success!</strong>', message: e.msg}, {type: 'success'});
                        location.reload();
                    } else {
                        $.notify({title: '<strong>Sorry!</strong>', message: e.msg}, {type: 'danger'});
                    }
                }, error: function (e) {
                    $.notify({
                        title: '<strong>Sorry!</strong>',
                        message: 'Record not has been deleted.'
                    }, {type: 'warning'});
                }
            });
        }
    });
    function showError(errors) {
        $.each(errors, function (index, val) {
            $('[name=' + index + ']').closest('.form-group').addClass('has-error');
            var ip_parent = $('[name=' + index + ']').closest('.form-group').children('div');
            $.each(val, function (index, val) {
                ip_parent.find('.error-container').html('<span class="clear-fix error text-danger"><span class="glyphicon glyphicon-exclamation-sign"></span> ' + val + '</span>')
            });
        });
    }

    $('.form-control, input').blur(function (event) {
        if ($(this).val() != '') {
            $(this).closest('.form-group').removeClass('has-error');
            $(this).closest('.form-group').find('.error').remove();
            $(this).closest('.form-group').addClass('has-success');
        } else {
            $(this).closest('.form-group').removeClass('has-error');
        }
    });
});
function editCharges(code) {
    $('#form-container').css('opacity', '0.5');
    $.get(location + '/edit/' + code, function (data) {
        $('#form-container').html(data);
        $('#form-container').css('opacity', '1');
    });
}
function fillForm(form_data) {
    $.each(form_data, function(index, val) {
 		var name_main = index;

 		$.each(val, function(index, val) {
 			$('[name="'+name_main+'['+index+']"]').val(val);
 		});
 	});
}