Php 动态显示名和姓作为选择选项

我试图动态显示数据库中人员的名字和姓氏。我已经成功地显示了名字，但我不知道如何使用姓氏来显示。任何帮助都将不胜感激：）

PHP:

$swimername\u query=“按名字ASC从游泳者订单中选择*”；
$swimername\u results=mysqli\u query（$dbcon，$swimername\u query）；
回声“；
回显“选择客户”；
回声“；
while（$displayname=mysqli\u fetch\u assoc（$displayname\u results））{
回显“$displayname['FirstName']”；
}

最好将ID列作为值，并在查询中将firstname与lastname合并在一起

$swimmername_query = "SELECT SwimmersID, Firstname || ' ' || Lastname SwimmerName From Swimmers ORDER BY FirstName ASC";
$swimmername_results = mysqli_query($dbcon, $swimmername_query);
echo "<option value=>";
echo "Select Customer";
echo "</option>";

while ($displayname = mysqli_fetch_assoc($swimmername_results)){
echo "<option value = '".$displayname['SwimmersID']."'>".$displayname['SwimmerName']."</option>";

$swimername_query=“从按姓氏ASC排序的游泳者中选择游泳者SID、姓氏| |“”| | |姓氏游泳者姓名”；
$swimername\u results=mysqli\u query（$dbcon，$swimername\u query）；
回声“；
回显“选择客户”；
回声“；
while（$displayname=mysqli\u fetch\u assoc（$displayname\u results））{
echo“$displayname['swimername']”；

最好将ID列作为值，并在查询中将firstname与lastname合并在一起

$swimmername_query = "SELECT SwimmersID, Firstname || ' ' || Lastname SwimmerName From Swimmers ORDER BY FirstName ASC";
$swimmername_results = mysqli_query($dbcon, $swimmername_query);
echo "<option value=>";
echo "Select Customer";
echo "</option>";

while ($displayname = mysqli_fetch_assoc($swimmername_results)){
echo "<option value = '".$displayname['SwimmersID']."'>".$displayname['SwimmerName']."</option>";

$swimername_query=“从按姓氏ASC排序的游泳者中选择游泳者SID、姓氏| |“”| | |姓氏游泳者姓名”；
$swimername\u results=mysqli\u query（$dbcon，$swimername\u query）；
回声“；
回显“选择客户”；
回声“；
while（$displayname=mysqli\u fetch\u assoc（$displayname\u results））{
echo“$displayname['swimername']”；

您可以在查询中直接对其进行解析，如下所示：

$swimmername_query = "SELECT *, CONCAT(FirstName, '-', LastName) AS FullName From Swimmers ORDER BY FirstName ASC";
$swimmername_results = mysqli_query($dbcon, $swimmername_query);
echo "<option value=>";
echo "Select Customer";
echo "</option>";

while ($displayname = mysqli_fetch_assoc($swimmername_results)){
     echo "<option value = '".$displayname['FullName']."'>".$displayname['FullName']."</option>";
}

$swimername\u query=“选择*，CONCAT（FirstName，'-'，LastName）作为按FirstName ASC排序的游泳者的全名”；
$swimername\u results=mysqli\u query（$dbcon，$swimername\u query）；
回声“；
回显“选择客户”；
回声“；
while（$displayname=mysqli\u fetch\u assoc（$displayname\u results））{
回显“$displayname['FullName']”；
}

或在while循环内的字符串处进行concat：

$swimmername_query = "SELECT * From Swimmers ORDER BY FirstName ASC";
$swimmername_results = mysqli_query($dbcon, $swimmername_query);
echo "<option value=>";
echo "Select Customer";
echo "</option>";

while ($displayname = mysqli_fetch_assoc($swimmername_results)){
    $fullname = $displayname['FirstName']."-".$displayname['LastName'];
    echo "<option value = '".$fullname."'>".$fullname."</option>";
}

$swimername\u query=“按名字ASC从游泳者订单中选择*”；
$swimername\u results=mysqli\u query（$dbcon，$swimername\u query）；
回声“；
回显“选择客户”；
回声“；
while（$displayname=mysqli\u fetch\u assoc（$displayname\u results））{
$fullname=$displayname['FirstName']。“-”$displayname['LastName']；
回显“$fullname.”；
}

您可以在查询中直接对其进行解析，如下所示：

$swimmername_query = "SELECT *, CONCAT(FirstName, '-', LastName) AS FullName From Swimmers ORDER BY FirstName ASC";
$swimmername_results = mysqli_query($dbcon, $swimmername_query);
echo "<option value=>";
echo "Select Customer";
echo "</option>";

while ($displayname = mysqli_fetch_assoc($swimmername_results)){
     echo "<option value = '".$displayname['FullName']."'>".$displayname['FullName']."</option>";
}

$swimername\u query=“选择*，CONCAT（FirstName，'-'，LastName）作为按FirstName ASC排序的游泳者的全名”；
$swimername\u results=mysqli\u query（$dbcon，$swimername\u query）；
回声“；
回显“选择客户”；
回声“；
while（$displayname=mysqli\u fetch\u assoc（$displayname\u results））{
回显“$displayname['FullName']”；
}

或在while循环内的字符串处进行concat：

$swimmername_query = "SELECT * From Swimmers ORDER BY FirstName ASC";
$swimmername_results = mysqli_query($dbcon, $swimmername_query);
echo "<option value=>";
echo "Select Customer";
echo "</option>";

while ($displayname = mysqli_fetch_assoc($swimmername_results)){
    $fullname = $displayname['FirstName']."-".$displayname['LastName'];
    echo "<option value = '".$fullname."'>".$fullname."</option>";
}

$swimername\u query=“按名字ASC从游泳者订单中选择*”；
$swimername\u results=mysqli\u query（$dbcon，$swimername\u query）；
回声“；
回显“选择客户”；
回声“；
while（$displayname=mysqli\u fetch\u assoc（$displayname\u results））{
$fullname=$displayname['FirstName']。“-”$displayname['LastName']；
回显“$fullname.”；
}

您的预期输出是什么？如果是“名字姓氏”。此时它只打印“名字”您的预期输出是什么？如果是“名字姓氏”。此时它只打印“名字”