我怎样才能运行PHP函数JavaScript的AJAX请求？ [英] How can I run a JavaScript AJAX request from a PHP function?
问题描述
我的PHP目前成功的 if语句只是重新加载页面：
标题（位置：的index.php）;
补充：链接到该网站在这里 http://marmiteontoast.co.uk /fyp/login-register/index.php
不过，我想运行一个基本的JavaScript Ajax请求，而不是加载一个页面注册-success.php 进的div：
函数loadSuccess（）
{VAR XMLHTTP;
如果（window.XMLHtt prequest）
{XMLHTTP =新XMLHtt prequest（）;}
其他
{XMLHTTP =新的ActiveXObject（Microsoft.XMLHTTP）;}
xmlhttp.onreadystatechange =功能（）
{如果（xmlhttp.readyState == 4和＆安培; xmlhttp.status == 200）
{的document.getElementById（登录注册 - 包装）的innerHTML = xmlhttp.responseText;}}
xmlhttp.open（GET，注册 - success.php，真正的）;
xmlhttp.send（）;}
不过，我不确定的JavaScript和PHP和这个组合如何实现它
1）是否有某种形式的PHP函数，我可以围绕一块JS的包装，使之制定呢？
2）有没有办法做一个简单的AJAX调用像这样在PHP中呢？或者一些模仿呢？
下面是验证我的表单功能。如果表单验证，我需要重新加载与AJAX和调用注册-成功文件
＆LT; PHP
在session_start（）;
需要'的functions.php;
如果（使用isset（$ _ POST ['签名行动']））{
//用户名
如果（使用isset（$ _ POST ['用户名']））{
$用户名= mysql_real_escape_string（修剪（$ _ POST ['用户名']））;
$ _SESSION ['状态'] ['注册'] ['用户名'] = $的用户名;
如果（strlen的（$用户名）→3）{
如果（strlen的（$用户名）＆LT; 31）{
如果（user_exists（$用户名）===真）{
$ _SESSION ['状态'] ['注册'] ['错误'] [] ='这个用户名已被使用。对不起，请重试使用不同的用户名。
} 其他{
//传递
// 继续
}
} 其他 {
$ _SESSION ['状态'] ['注册'] ['错误'] [] ='用户名超过30个字符。;
}
} 其他 {
$ _SESSION ['状态'] ['注册'] ['错误'] [] ='用户名少于3个字符。;
}
} 其他 {
$ _SESSION ['状态'] ['注册'] ['错误'] [] ='用户名不进。;
}
如果（使用isset（$ _ POST ['密码']））{
$密码= mysql_real_escape_string（修剪（$ _ POST ['密码']））;
如果（strlen的（$密码）＆GT; = 8）{
$密码= hash_function（$密码）;
} 其他 {
$ _SESSION ['状态'] ['注册'] ['错误'] [] =你的秘密密码太短你应该做一个密码至少包含8个字母。
}
} 其他 {
$ _SESSION ['状态'] ['注册'] ['错误'] [] =你不能把一个密码。
}
// 电子邮件地址
如果（！空（$ _ POST ['EMAIL_ADDRESS']））{
$ EMAIL_ADDRESS = mysql_real_escape_string（修剪（$ _ POST ['EMAIL_ADDRESS']））;
$ _SESSION ['状态'] ['注册'] ['EMAIL_ADDRESS'] = $ EMAIL_ADDRESS;
如果（strlen的（$ EMAIL_ADDRESS）→10）{//电子邮件地址小于10
如果（strlen的（$ EMAIL_ADDRESS）＆LT; 161）{//如果超过160个
如果（email_valid（$ EMAIL_ADDRESS）== FALSE）{//电子邮件地址格式无效
$ _SESSION ['状态'] ['注册'] ['错误'] [] =电子邮件地址已经放在错误的。请检查并再试一次。
}
其他{
//通过最小长度，通过最大长度，通过验证
// 继续
}
}
其他
{
$ _SESSION ['状态'] ['注册'] ['错误'] [] ='电子邮件地址太长。;
}
}
其他
{
$ _SESSION ['状态'] ['注册'] ['错误'] [] =电子邮件地址太短，不能超过10个字母更短。
}
}
其他{//传递（没有电子邮件输入）
}
如果（使用isset（$ _ POST ['条款']））{
$ _SESSION ['状态'] ['注册'] ['TOS'] = $ _ POST ['条款'];
如果（空（$ _ SESSION ['状态'] ['注册'] ['错误']））{
如果（寄存器（$ EMAIL_ADDRESS，$的用户名，密码$）===真）{
// 成功！！
$ _SESSION ['状态'] ['注册'] ['成功'] =真;
//发送电子邮件
SEND_EMAIL（$ EMAIL_ADDRESS）;
} 其他 {
回声mysql_error（）;
死（）;
$ _SESSION ['状态'] ['注册'] ['错误'] [] =出事了，我们很抱歉，请重试。;
}
} 其他 {}
} 其他 {
$ _SESSION ['状态'] ['注册'] ['错误'] [] =您必须同意众议院规则才能够注册。
}
标题（位置：的index.php）;
} 其他 {
//成功脚本AJAX放在这里
}
？＆GT;
您需要编写PHP阻止外部的JavaScript code，打完？>。 Ajax调用是由客户方提出，所以只用JavaScript。
要简化你的code，就可以使用JavaScript的lib，像jQuery，因此code是更简单：
$（'＃登录注册 - 包装）的负载（'寄存器success.php）。
您可以做这个用PHP一样的Kamehameha答案，使用ob_get_contents（）。
在这种情况下，不脱离html页面参数，结果是一样的，从处理。内容
编辑：
总部设在评论，你需要重定向到'的index.php'一些参数，如：
标题（位置：的index.php成功= 1'）;
所以，在index.php文件，你可以写一些像这样的：
如果（使用isset（$ _ GET ['成功']）及和放大器; $ _GET ['成功'] == 1）{
回声'＆LT;脚本＆GT;功能loadSuccess（）
{VAR XMLHTTP;
如果（window.XMLHtt prequest）
{XMLHTTP =新XMLHtt prequest（）;}
其他
{XMLHTTP =新的ActiveXObject（Microsoft.XMLHTTP）;}
xmlhttp.onreadystatechange =功能（）
{如果（xmlhttp.readyState == 4和＆安培; xmlhttp.status == 200）
{的document.getElementById（登录注册 - 包装）的innerHTML = xmlhttp.responseText;}}
xmlhttp.open（GET，注册 - success.php，真正的）;
xmlhttp.send（）;}＆所述; /脚本＆GT;';
}
编辑：
在标签体，需要调用javascript函数loadSuccess（）。像这样的：
＆LT;身体的onload =loadSuccess（）＆GT;
Currently the success of my PHP if statement just reloads the page:
header('Location: index.php');
Added: link to the site here http://marmiteontoast.co.uk/fyp/login-register/index.php
However I want to run a JavaScript basic AJAX request instead to load a page register-success.php into the div:
function loadSuccess()
{var xmlhttp;
if (window.XMLHttpRequest)
{xmlhttp=new XMLHttpRequest();}
else
{xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");}
xmlhttp.onreadystatechange=function()
{if (xmlhttp.readyState==4 && xmlhttp.status==200)
{document.getElementById("login-register-wrapper").innerHTML=xmlhttp.responseText;}}
xmlhttp.open("GET","register-success.php",true);
xmlhttp.send();}
However I am unsure about this combination of JavaScript and PHP and how to implement it
1) Is there some sort of PHP function I can wrap around a piece of JS to make it enact it?
2) Is there a way to do a simple AJAX call like this in PHP instead? Or something that mimics it?
Here is the function that validates my form. If the form validates, I need to reload with AJAX and call in register-success file
<?php
session_start();
require 'functions.php';
if(isset($_POST['sign-up'])){
// username
if (isset($_POST['username'])){
$username = mysql_real_escape_string(trim($_POST['username']));
$_SESSION['status']['register']['username'] = $username;
if(strlen($username) > 3){
if(strlen($username) < 31){
if(user_exists($username) === true){
$_SESSION['status']['register']['error'][] = 'That username is already taken. Sorry, please try again with a different username.';
} else{
// passed
// continue
}
} else {
$_SESSION['status']['register']['error'][] = 'The username is greater than 30 characters.';
}
} else {
$_SESSION['status']['register']['error'][] = 'The username is less than 3 characters.';
}
} else {
$_SESSION['status']['register']['error'][] = 'The username is not entered.';
}
if (isset($_POST['password'])){
$password = mysql_real_escape_string(trim($_POST['password']));
if(strlen($password) >= 8){
$password = hash_function($password);
} else {
$_SESSION['status']['register']['error'][] = "Your secret password is too short. You should make a password with at least 8 letters.";
}
} else {
$_SESSION['status']['register']['error'][] = "You haven't put in a password.";
}
// Email address
if (!empty($_POST['email_address'])){
$email_address = mysql_real_escape_string(trim($_POST['email_address']));
$_SESSION['status']['register']['email_address'] = $email_address;
if(strlen($email_address) > 10){ // email address less than 10
if(strlen($email_address) < 161){ // if longer than 160
if(email_valid($email_address) == false){ // email address invalid format
$_SESSION['status']['register']['error'][] = "The email address has been put in wrong. Please check and try again.";
}
else{
// passed min length, passed max length, passed validation
// Continue
}
}
else
{
$_SESSION['status']['register']['error'][] = 'The email address is too long.';
}
}
else
{
$_SESSION['status']['register']['error'][] = "The email address is too short. It can't be shorter than 10 letters.";
}
}
else{// passed (no email input)
}
if (isset($_POST['tos'])){
$_SESSION['status']['register']['tos'] = $_POST['tos'];
if(empty($_SESSION['status']['register']['error'])){
if(register($email_address, $username, $password) === true){
// Success!!
$_SESSION['status']['register']['success'] = true;
// Sends an email
send_email($email_address);
} else {
echo mysql_error();
die();
$_SESSION['status']['register']['error'][] = "Something went wrong. We're sorry. Please try again.";
}
} else {}
} else {
$_SESSION['status']['register']['error'][] = "You have to agree to the House Rules to be able to sign up.";
}
header('Location: index.php');
} else {
// success script with AJAX goes here
}
?>
You need to write javascript code outside PHP Block, so after ?>. Ajax call are made from client side, so only with javascript.
To simplify your code, you can use a javascript lib, like jQuery, so the code is more simple:
$('#login-register-wrapper').load('register-success.php');
You can made this with PHP like Kamehameha Answer, using ob_get_contents().
In this case, without parameters from html page, the result is the same, the content from processed.
Edit:
Based in comments, you need to redirect to 'index.php' with some parameter, like:
header('Location: index.php?success=1');
So, in index.php, you can write some like this:
if (isset($_GET['success']) && $_GET['success'] == 1) {
echo '<script>function loadSuccess()
{var xmlhttp;
if (window.XMLHttpRequest)
{xmlhttp=new XMLHttpRequest();}
else
{xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");}
xmlhttp.onreadystatechange=function()
{if (xmlhttp.readyState==4 && xmlhttp.status==200)
{document.getElementById("login-register-wrapper").innerHTML=xmlhttp.responseText;}}
xmlhttp.open("GET","register-success.php",true);
xmlhttp.send();}</script>';
}
Edit:
In tag body, you need to call javascript function loadSuccess(). Like this:
<body onload="loadSuccess()">
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