使用POST從HTML表單獲取選擇選項值

Question

我有一個表格，可以獲取一些不同的信息。 但是然后我有一個帶有多個選項的Select，我希望能夠以1或0 / true或false將其發送到數據庫。 但這是行不通的。 到目前為止，這是我的代碼：

              <select name="multipleSelect[]" multiple>
                <option value="" disabled selected>Choose your option</option>
                <option name="esea" value="esea">ESEA</option>
                <option name="faceit" value="faceit">FaceIT</option>
                <option name="matchmaking" value="matchmaking">Matchmaking</option>
              </select>
              <label>What are you looking to play?</label>

這是我的PHP：

$esea = 0;
$faceit = 0;
$matchmaking = 0;
foreach ( $_POST['multipleSelect'] as $value ) {
    if ( $value == 'esea' )        { $esea = 1;       }
    if ( $value == 'faceit' )      { $faceit= 1;      }
    if ( $value == 'matchmaking' ) { $matchmaking= 1; }
}   


  // Sätt in dataN
  $sql = "INSERT INTO users ( steamid, profilename, profileurl, avatar, region, age, ranks, esea, faceit, matchmaking, textarea1 ) VALUES ( 
    '{$mysqli->real_escape_string($_POST['steamid'])}', 
    '{$mysqli->real_escape_string($_POST['profilename'])}',
    '{$mysqli->real_escape_string($_POST['profileurl'])}',
    '{$mysqli->real_escape_string($_POST['avatar'])}',
    '{$mysqli->real_escape_string($_POST['region'])}',
    '{$mysqli->real_escape_string($_POST['age'])}',
    '{$mysqli->real_escape_string($_POST['ranks'])}',
    $esea,
    $faceit,
    $matchmaking',
    '{$mysqli->real_escape_string($_POST['textarea1'])}')";
  $insert = $mysqli->query($sql);

我知道這段代碼行不通，但是我不知道該怎么做才能使其正常工作。 我不會發送1或0，具體取決於是否選擇了替代項。

Answer 1

您的select html標記需要具有name屬性，以便表單onSubmit發送到“后端”。

像這樣：

<select name="enterNameThatMakesSense" multiple>  // <----- HERE
  <option value="" disabled selected>Choose your option</option>
  <option name="esea" value="1">ESEA</option>
  <option name="faceit" value="1">FaceIT</option>
  <option name="matchmaking" value="1">Matchmaking</option>
</select>
<label>What are you looking to play?</label>

Answer 2

您用於多個可選下拉列表的<select>必須是一個數組，由name="NameThatMakesSense[]"

<select name="NameThatMakesSense[]" multiple>

然后，這將返回一個名為$ _POST ['NameThatMakesSense']的字段，該字段本身是一個包含1個或多個值的數組，這些值指示下拉列表中的哪些項已被選擇。 來自<option>標記的value=""屬性

然后，您將需要預處理NameThatMakesSense數組，以選擇從多選下拉列表中實際選擇的值。

$esea = 0;
$esea = 0;
$esea = 0;
foreach ( $_POST['NameThatMakesSense'] as $value ) {
    if ( $value == 'esea' )        { $esea = 1;       }
    if ( $value == 'faceit' )      { $faceit= 1;      }
    if ( $value == 'matchmaking' ) { $matchmaking= 1; }
}    

$sql = "INSERT INTO users 
             ( profilename, profileurl, avatar, region, 
               age, esea, faceit, matchmaking, textarea1 ) 
        VALUES ( 

'{$mysqli->real_escape_string($_POST['profilename'])}',
'{$mysqli->real_escape_string($_POST['profileurl'])}',
'{$mysqli->real_escape_string($_POST['avatar'])}',
'{$mysqli->real_escape_string($_POST['region'])}',
'{$mysqli->real_escape_string($_POST['age'])}',
'{$mysqli->real_escape_string($_POST['ranks'])}',
$esea,
$faceit,
$matchmaking,
'{$mysqli->real_escape_string($_POST['textarea1'])}')";