如何将单个值发布到PHP MyAdmin。 此代码似乎无效。 我正在尝试从表单获取值到数据库

Question

<form action="signup.php" method="POST" id="newsletter">
<h4>Join Our Newsletter</h4>
<input id="email" type="text" value="Enter Email Address Here For Updates" onBlur="javascript:if(this.value==''){this.value=this.defaultValue;}" onFocus="javascript:if(this.value==this.defaultValue){this.value='';}">
<input type="submit" value="Sign up" class="btn2">
</form>


<?php

$dsn = "mysql:dbname=test_db";
$DBusername = "test";
$DBpassword = "test";

try {
    $conn = new PDO($dsn, $DBusername, $DBpassword);
}
catch(PDOException $e) {

}

$email = $_POST["email"];

$sql = "INSERT INTO contacts (email) VALUES (:email)";

$pdoQuery = $conn->prepare($sql);

$pdoQuery->bindValue(":email", $email, PDO::PARAM_STR);

$pdoQuery->execute();

setcookie("success", "You have successfully signed up for the newsletter.", 0, "/");

header("Location: index.php");
?>

These are both on separate pages, and I can't seem to figure out why they won't work. Any help would be greatly appreciated! Nothing posts to the database at all. The cookie is working though.

Answer 1

Your connection is probably failing. You don't have a host in your DSN

 $dsn = "mysql:host=localhost;dbname=test_db";

Not sure if it is localhost, but hope this shows what it should be. It would also probably help that when you catch the exception, that you output something.

even...

catch(PDOException $e) {
     echo "error - ".$e->getMessage().PHP_EOL;
     exit;
}