昨天写一个功能：点击手机验证的同时获取json端的数据。
javascript代码如下：
$(".check_mobile").click(function(){var mobile = $('.mobile').val();$.getJSON("http://www.huudi.com/user.php?mobile="+mobile+"&format=json&jsoncallback=?", function(data){if (data.succ == 1) {var html = "<input type='hidden' name='cityid' value='"+data.data.cityid+"'><input type='hidden' name='communityid' value='"+data.data.communityid+"'>";$(".r_m").append(html);}});}); user.php代码如下：
<?phpif($_GET){$mobile = $_GET['mobile'];if ($mobile == 'XXXX') {$user = array('city' =>'石家庄','cityid' =>'1','community' =>'紫晶悦城','communityid'=>'1');$sucess = 1;$return = array('succ' =>$sucess,'data' => $user);}else {$sucess = 2;$return = array('succ' =>$sucess);}echo json_encode($return);}?> 相应如下：
问题出来了：
在火狐浏览器中： SyntaxError: missing ; before statement
解决方法如下：
header("Access-Control-Allow-Origin:http:www.test.com");$b = json_encode($return);echo "{$_GET['jsoncallback']}({$b})";exit; 最后完整代码：
<?phpheader("Access-Control-Allow-Origin:http:www.test.com");if($_GET){$mobile = $_GET['mobile'];if ($mobile == '18831167979') {$user = array('city' =>'石家庄','cityid' =>'1','community' =>'紫晶悦城','communityid'=>'1');$sucess = 1;$return = array('succ' =>$sucess,'data' => $user);}else {$sucess = 2;$return = array('succ' =>$sucess);}$b = json_encode($return);echo "{$_GET['jsoncallback']}({$b})";exit;}?> 如果在 PHP 中少了 header("Access-Control-Allow-Origin:http:www.test.com"); 代码，则会出现
XMLHttpRequest cannot load ''. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin ' ' is therefore not allowed access.
如果少了 echo "{$_GET['jsoncallback']}({$b})"; 代码
在谷歌浏览器中：Uncaught SyntaxError: Unexpected token :
在火狐浏览器中：SyntaxError: missing ; before statement
