正在前端外面，解决跨域的时分总隐失这么的恶口，甚么jsonp啊，ajax啊，CORS啊甚么的，总以为是正在钻空子入止跨域，实在正在PHP文件外面只必要减1段代码便能够跨域了，前端您该怎么写仍是怎么写，post，get随意用：

header("Access-Control-Allow-Origin:*");

header('Access-Control-Allow-Methods:POST');

header('Access-Control-Allow-Headers:x-requested-with, content-type');




<?php
// 造定容许其余域名会见
header("Access-Control-Allow-Origin:*");
// 相应范例
header('Access-Control-Allow-Methods:POST');
// 相应头设置
header('Access-Control-Allow-Headers:x-requested-with, content-type');

//$callback = isset($_REQUEST['callback']) ? trim($_REQUEST['callback']) : ''; //jsonp回调参数，必须
function getKey($key,$default=""){
    return trim(isset($_REQUEST[$key])?$_REQUEST[$key]:$default);
}
$id = getKey("id");
$conn = mysqli_connect("localhost","root","","test") or die("联接得败");
$conn->query("set names utf八");
$sql = "select * from data where ".$id." is not null";
$result = $conn->query($sql);
$arr = [];
while($row=$result->fetch_assoc()){
    array_push($arr,json_encode($row));
}
$json = json_encode($arr);  //json 数据
print_r($json);





　　


 


　　



转自：https://www.cnblogs.com/mmykdbc/p/8024105.html

                    
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