如何从数据库中的列中选择所有结果

Question

我有一个带有选择字段的表单：

<select class="indexSearchLocationList" name="locationList">
    <option value="allLocations">Anywhere in London</option>
    <option value="barking_and_dagenham">Barking and Dagenham </option>
    <option value="barnet">Barnet</option>

我想尝试做的是，如果用户选择分配选项（在伦敦的任何地方），那么我需要使用它来选择所有查询数据库下面是我当前拥有的php但是如何指定该特定选项选择：

$choosenLocation = $_POST['locationList'];

Answer 1

你期待类似的东西，

        $choosenLocation = $_POST['locationList'];

        if(isset($choosenLocation) && $choosenLocation == 'allLocations'){

           $query = "select * from TABLE ";

           //based on the mysqli_ or PDO you execute

           //fetch the row and display accordingly

        }else{

             $query = "select * from TABLE WHERE condition='your condition here' " ;
          }

Answer 2

我认为可能是

    if(isset($_POST['locationList']) & $_POST['locationList']=='allLocations')
   {

       $query = "select * from TABLE ";

       //based on the mysqli_ or PDO you execute

       //fetch the row and display accordingly

    }

Answer 3

试试这个，如果不符合您的要求，请将您的要求简要添加为评论。

$choosenLocation = $_POST['locationList'];

    if($choosenLocation == 'allLocations')
    {

       $query = "select * from TABLE ";


    }
    else
    {
       $query = "select * from TABLE WHERE condition="any_condition";
    }