你需要修好几件事情。
>首先，处理注册过程的文件不应该是与表单相同的文件。
>它纯粹用于处理数据，因此不能使用头(“Location：login.php”)直接重定向浏览器。这部分应该由你的JavaScript代码来处理。
>您还需要告诉浏览器，正在提供的内容是JSON。
>您还需要防止表单直接提交
看看下面更新的代码。
创建一个名为：
registrationHandler.php
if(isset($_POST['reg'])){
$fn = ucfirst($_POST['fname']);
$ln = ucfirst($_POST['lname']);
$un = $_POST['username'];
$em = $_POST['email'];
$pswd = $_POST['password'];
$pswd2 = $_POST['password2'];
$sql=$db->prepare("SELECT username FROM users WHERE username=:username");
$sql->execute(array(':username'=>$un));
$row = $sql->fetch(PDO::FETCH_ASSOC);
$db_username = $row['username'];
$usernames = $db_username;
$data = array();
if( isset($fn) && isset($ln) ) {
if( $fn != "" && $ln!="" && $fn == $ln ) {
$data["flname"] = "cntbempty";
}
}
if( isset($un) ) {
if $un == $usernames ) {
$data["username"] = "inuse";
}
}
if( isset($pswd) && isset($pswd2) ) {
if( $pswd2 != "" && $pswd != $pswd2 ) {
$data["password"] = "missmatch";
}
}
if( isset( $em ) ) {
if( $em != "" && !preg_match( "/^([a-zA-Z0-9])+([a-zA-Z0-9\._-])*@([a-zA-Z0-9_-])+([a-zA-Z0-9\._-]+)+$/", $_POST["email"] ) ) {
$data["email"] = "notvalid";
}
}
if(!empty($data))
{
header('Content-Type: application/json');
echo json_encode($data);
die;
}
else{
$pswd = password_hash($pswd, PASSWORD_DEFAULT);
$pswd2 = password_hash($pswd2, PASSWORD_DEFAULT);
$stmt = $db->prepare("INSERT INTO users (username,first_name,last_name,email,password,password2,) VALUES (:username,:first_name,:last_name,:email,:password,:password2,)");
$stmt->execute( array(':username'=>$un,':first_name'=>$fn,':last_name'=>$ln,':email'=>$em,':password'=>$pswd,':password2'=>$pswd2));
}
//! Send Success Status to browser for it to understand
if ($stmt->rowCount() == 1) {
$data['success'] = true;
}
else {
$data['success'] = false;
}
header('Content-Type: application/json');
echo json_encode($data);
}
?>
你的Javascript代码：
$(document).ready(function(){
$("form.register").submit(function(e) {
e.preventDefault();
$.post("registrationHandler.php", $("form.register").serialize(), function( data ) {
if( data.flname == "cntbempty" )
$("p#name_error").slideDown();
else
$("p#name_error").hide();
if( data.username == "inuse" )
$("p#username_error").slideDown();
else
$("p#username_error").hide();
if( data.password == "missmatch" )
$("p#password_error").slideDown();
else
$("p#password_error").hide();
if( data.email == "notvalid" )
$("p#email_error").slideDown();
else
$("p#email_error").hide();
if(data.success) {
// registration succesful. Redirect
window.location = "login.php";
}
else {
// Some database error?
}
}, "json");
});
});
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