问数组将字符串从javascript更改为php

EN

<input name="feature[1]" value="1" type="hidden">
<input name="feature[2]" value="1" type="hidden">
<input name="feature[3]" value="1" type="hidden">

features = $.map($('#add-place [name^="feature"]'), function(item, index)
{
    if($(item).val()=='1')
    {
        return $(item).attr('name').replace(/[^0-9]/g, '');
    }
});

form = new FormData();
features = $.map($('[name^="feature"]'), function(item, index){if($(item).val()=='1'){return $(item).attr('name').replace(/[^0-9]/g, '');}});
form.append('features', features);
$.ajax({
    url: url,
    type: 'POST',
    dataType: 'json',
    enctype: 'multipart/form-data',
    cache: false,
    processData: false,
    contentType: false,
    data: form,
    complete: function(response)
    {
        //
    }
});