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我試圖將數據插入到MySQL,但沒有工作, 任何錯誤都出現了波紋管的PHP腳本PHP mysqli的插入不工作
$mysqli = new mysqli('localhost','root','','realestate');
if($mysqli->connect_error){
printf("can not connect database %s\n",$mysqli->connect_error);
exit();
}
if (isset($_POST['submit'])){
$a_name=$_POST['a_name'];
$a_number=$_POST['a_number'];
$email=$_POST['email'];
$password=$_POST['password'];
$target_dir="uploads/";
$target_file=$target_dir . basename($_FILES["a_image"]["name"]);
$temp_file=$_FILES["a_image"]["name"];
move_uploaded_file($_FILES["a_image"]["tmp_name"], $target_file);
$query="INSERT INTO agent (a_name,a_number,email,password,a_image)
VALUES ('$a_name',$a_number,'$email','$password','$temp_file')";
$insert = $mysqli->query($query);
u能解釋如何檢查,如果電子郵件地址已存在在數據庫中? –