ajax在php中应用实例
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1，ajax分为$.ajax()，$.get()，$.post()，$.getJSON() 几种形式，实例如下：
<html> <meta http-equiv="Content-Type" content="text/html;charset=utf-8"> <script type="application/javascript" src="../js/jquery-1.7.2.js"></script> <script type="application/javascript"> $(document).ready(function(){ $("#ajaxBut").click(function(){ $.ajax({ ‘type‘:‘get‘, ‘url‘:‘test4.php‘, ‘dateType‘:‘json‘, ‘data‘:$("input").serialize(), ‘success‘:function(ret){ alert(ret); } }); }); $("#getBut").click(function(){ $.get("test4.php",$("input").serialize(),function(ret){ alert(ret); }); }); $("#postBut").click(function(){ $.post("test5.php",$("input").serialize(),function(ret){ alert(ret); }); }); $("#jsonBut").click(function(){ $.getJSON("test4.php",$("input").serialize(),function(ret){ alert(ret); }); }); }); </script> <body> <form> <h1>user Login</h1> username:<input type="text" name="user" id="user" /><br/> password:<input type="password" name="password" id="password"/><br/> <input type="button" name="but" id = "ajaxBut" value="ajaxLogin" /> <input type="button" name="but" id = "postBut" value="postLogin" /> <input type="button" name="but" id = "getBut" value="getLogin" /> <input type="button" name="but" id = "jsonBut" value="jsonLogin" /> </form> </body> </html>
test4.php
<?php
$username = $_GET[‘user‘];
$password = $_GET[‘password‘];
$ret = "fail";
if($username == ‘zhangsan‘ && $password == ‘123‘){
$ret = "success";
}
echo json_encode($ret);
test5.php
<?php
$username = $_POST[‘user‘];
$password = $_POST[‘password‘];
$ret = "fail";
if($username == ‘zhangsan‘ && $password == ‘123‘){
$ret = "success";
}
echo json_encode($ret);
2，ajax跨域获取数据，使用到jsonp，实例如下：
$.getJSON("http://www.ganji.com/test6.php?callback=?", $("input").serialize() , function(data){
if(data){
console.log(data);
}
});
test6.php
$str = ‘OK‘;
$callback = $_GET(‘callback‘);
if (!empty($callback)) {
header("content-type: application/x-javascript; charset=UTF-8");
echo $callback . ‘(‘ . $str . ‘)‘;
} else {
echo $str;
}
}
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