我用這個代碼,我不知道是什麼問題,我使用了不同的代碼以及如何避免重複的電子郵件php/sql?
什麼我想要做的檢查,不允許用戶添加他的郵件兩次
<?php
include("includedb.php");
//declare variables
$name = $_POST['name'];
$email = $_POST['email'];
$tel = $_POST['tel'];
$gift = $_POST['gift'];
$formName = $_POST['formName'];
$formEmail = $_POST['formEmail'];
$formEmirate = $_POST['formEmirate'];
$birthday = $_POST['birthday'];
$date = $_POST['date'];
$result = mysqli_query("SELECT * FROM users WHERE email = '$email'") or exit(mysqli_error()); //check for duplicates
$num_rows = mysqli_num_rows($result); //number of rows where duplicates exist
if ($num_rows == 0) { //if there are no duplicates...insert
$sql = "INSERT INTO users (name, email, tel, gift, formName, formEmail, formEmirate, birthday, date)
VALUES ('$name', '$email', '$tel','$gift', '$formName', '$formEmail', '$formEmirate','$birthday',CURRENT_TIMESTAMP)";
if (!mysqli_query($sql)) {
die('Error: ' . mysqli_error());
}
}
mysqli_close();
header("location: thank-you.html?remarks=success");
?>
的數據庫您使用 –
你的邏輯似乎很動聽,什麼exactely是不使用該代碼?順便說一下,你可以開放SQL注入,請閱讀。 :) – xander
'if($ num_rows == 0){...} else {$ sql =「UPDATE ...」} –