require_once "../config.php";
#Editing user's Id
if(isset($_GET['id'])){
$id = $_GET['id'];
$queryT = "SELECT * FROM teachers WHERE t_id = $id";
$results = mysqli_query($link, $queryT);
$myRow = mysqli_fetch_array($results);
}
$userName = htmlspecialchars($_POST['username']);
if(isset($_POST['submit'])){
if(empty($userName)){
$userNameErr = "<span>Username is required!.</span>";
}elseif($rowcount == 1 AND $userName != $myRow['username']){
$userNameErr = "<span>That username is taken!.</span>";
}
一切顺利但是当我提交编辑过的表格时,之前的Get ID会消失 和$ myRow [&#39;用户名&#39;]成为未定义的变量
答案 0 :(得分:0)
您可以测试索引是否设置为if(isset($ myRow ['username']))
并且您应该始终在要使用它的范围内声明一个变量。 Php并不严格,这意味着你必须这样做。
$myRow = [];
if(isset($_GET['id'])){
$id = $_GET['id'];
$queryT = "SELECT * FROM teachers WHERE t_id = $id";
$results = mysqli_query($link, $queryT);
$myRow = mysqli_fetch_array($results);
}
要保留get变量,可以将其存储在表单的隐藏字段中,并执行类似
的操作$id = (isset($_GET['id'])
? $_GET['id']
: isset($_POST['id'])
? $_POST['id']
: 0;
if($id !== 0){
$queryT = "SELECT * FROM teachers WHERE t_id = $id";
$results = mysqli_query($link, $queryT);
$myRow = mysqli_fetch_array($results);
}