php - 在 POST 复选框值的数组上使用 preg_match

Question

我遇到的问题是让 preg_match 对从我的表单返回的数组正常工作。

<input type="checkbox" name="receiver-check[]" class="checkbox-id" value="Username 1 (123)">
<input type="checkbox" name="receiver-check[]" class="checkbox-id" value="Username 2 (456)">
<input type="checkbox" name="receiver-check[]" class="checkbox-id" value="Username 3 (789)">

所以我希望对通过我的表单收到的值使用 preg_match。这就是我的使用方式。

$msg_receivers = !empty($_POST['receiver-check']) && is_array($_POST['receiver-check']) ? $_POST['receiver-check'] : array();
    $receiverIds = array();
    foreach($msg_receivers as $receiver) {
        $receiverIds[] = preg_replace('/\((\d+)\)$/', "$1", $receiver);
    }
    $number_of_receivers = count($receiverIds);
    $while_count = 0;
    while($number_of_receivers >= ($while_count + 1)){
        $sql = <<< EOF
        INSERT INTO private_messages (
        message_subject,
        message_content,
        message_deliver,
        message_receive,
        message_status,
        message_datetime,
        message_to_stab
        )VALUES
        (?,?,?,?,'2',?,?);
EOF;
        $stmt = $mysqli->prepare($sql) or die ("Feil i database<br>" . $sql . "<br><b>Feilmelding:</b> " . $mysqli->error);
        $stmt->bind_param("ssiiii",$message_subject,$message_content, $_SESSION['user_id'],$receiverIds[$while_count],$message_datetime,$message_to_stab);
        $stmt->execute() or die("noe gikk galt");
        $msg_num_rows = $stmt->num_rows;
        if($msg_num_rows = 0){
            $msg = "Feilmelding: Klarte ikke å sende meldingen.";
        }
        else{
            $msg = "Meldingen har blitt sendt.";
        }
        $stmt->free_result();
        $stmt->close();
        $while_count ++;
    }

然后我使用 $msg_receiver_query 在 while 循环内的查询中分配一个值。我目前在我的数据库中收到的是 0 和 1。没有别的。正确的 preg_match 是什么让我只输出括号内的数字？我的这个问题有没有更有效的解决方案？

Answer 1

看起来您不想匹配，您只想提取每个 $_POST['receiver-check'] 值的一部分 - 所以 preg_replace() 将是正确的函数。

$msg_receivers = !empty($_POST['receiver-check']) && is_array($_POST['receiver-check']) 
             ? $_POST['receiver-check'] : array();

$receiverIds = array();

foreach($msg_receivers as $receiver) {
  $receiverIds[] = preg_replace('/^.*\((\d+)\)$/', "$1", $reciever);
}

这应该会为您提供一组接收者 ID($receiverIds)，例如:

array(
  [0] => 123, 
  [1] => 456, 
  [2] => 789
  );