如何从提交和检查它们是否存在于mysql中POST值?我需要在。php文件中输入什么呢?
document.addEventListener("deviceready", onDeviceReady, false);
function onDeviceReady() {
$('#login').submit(function(){
var username = document.getElementById("username").value;
var password = document.getElementById("password").value;
});
}
function getData(sendData) {
$.ajax({
type: 'POST',
url: 'http://www.url.php',
data: { 'username': username, 'password': password },
success: afhandeling,
});
}
这样调用ajax:
jQuery.ajax({
type: "POST",
url: "http://www.url.php",
data: { username:username,password:password },
success: function( data )
{
}
});
在ajax文件中:
if (isset($_POST['username']) && isset($_Post['password']))
{
$query = "SELECT * FROM users WHERE username='".$_POST['username']."' AND password=".$_POST['password'];
$result = mysql_query($query);
$row = mysql_fetch_assoc($result);
if($row)
{
echo 'login';
}
else
{
echo "error";
}
}
我认为URL必须是本地的，即。"/项目/blindchat/login"。
在那一页你可以这样写:
if (isset($_POST['username']) && isset($_POST['password'])) {
// MYSQL query:
SELECT 1 FROM users WHERE username = ? AND password = ?
}
请记住，您必须首先转义变量以防止SQL注入。
在login.php页面中，您需要这样做:
if(isset($_POST['username']) && isset($_Post['password'])) {
$q = "SELECT * FROM users WHERE username=$_POST['username'] AND password=$_POST['password']"
$r = mysql_query($q);
if(mysql_num_rows($r)==1) //Do Login
else echo "ERROR";
}
提交表单，该表单启动ajax脚本，该脚本将数据发送到PHP文件，PHP文件处理输入并给出答案。
使用PDO或MySqLi。Mysql已被弃用，不再受支持。下面的例子使用了PDO方法。
你的PHP应该看起来像这样(这是未经测试的代码，所以可能有拼写错误):
<?php
$username = $_POST['username'];
$password = $_POST['password'];
if (!empty($username) && !empty($password)) {
// We create a PDO connection to our database
$con = new PDO("mysql:host=yourhost;dbname=yourdatabase", "username", "password");
// We prepare our query, this effectively prevents sql injection
$query = $con->prepare("SELECT * FROM table WHERE username=:username AND password=:password LIMIT 1");
// We bind our $_POST values to the placeholders in our query
$query->bindValue(":username", $username, PDO::PARAM_STR);
$query->bindValue(":password", $password, PDO::PARAM_STR);
// We execute our query
$query->execute();
$result = $query->fetch(); // Grab the matches our query produced
// Here we check if we found a match in our DB
if (!empty($result)) {
echo "Matches were found";
} else {
echo "No matches found";
}
} else {
echo "Please fill out all fields";
}
?>
至于从AJAX脚本获得回复，您可以简单地提醒响应或根据您的需要显示它。
success: function(data) {
alert(data);
}