php验证请求页面来源:
if( $_server['http_x_requested_with'] == 'xmlhttprequest' ) { echo 'ajax'; } else { echo 'normal'; }
jquery内部实现ajax的时候,已经加入了标识,jquery源码中是这样的:
xhr.setrequestheader("x-requested-with", "xmlhttprequest");
所以,在php中可以通过http_x_requested_with来判断,不需要另外实现,下面看原理:在发送ajax请求的时候,我们可以通过xmlhttprequest这个对象,创建自定义的header头信息,如果您使用的是原生的ajax方法,也就是未使用jquery或者其他js框架包装的ajax方法,那么代码如下:
xmlhttprequest.setrequestheader("request_type","ajax");
通过jquery的$.ajax()方法,可以轻松地在发送ajax请求之前,创建我们自定义的header头信息.
$.ajax({ type: "get", url: base_url + 'php_check_ajax_request/get_user_list.html', beforesend: function (xmlhttprequest) { xmlhttprequest.setrequestheader("request_type","ajax"); }, success: function(data){ $("#user_list").html(data); $tip.hide(); $button.attr('disabled',true); } });
在php获取时:
if (isset($_server['http_request_type']) && $_server['http_request_type'] == "ajax"){//ajax提交 }else{//非ajax提交 }
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