<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><script> ???function fn1(data){ ???????var oUl1 = document.getElementById(‘ul1‘); ???????var html = ‘‘; ???????for (var i=0; i<data.length; i++) { ???????????html += ‘<li>‘+data[i]+‘</li>‘; ???????} ???????oUl1.innerHTML = html; ???} ???????function fn2(data){ ???????var oUl2 = document.getElementById(‘ul2‘); ???????var html = ‘‘; ???????for (var i=0; i<data.length; i++) { ???????????html += ‘<li>‘+data[i]+‘</li>‘; ???????} ???????oUl2.innerHTML = html; ???} ???window.onload = function(){ ???????var oBut1 = document.getElementById(‘btn1‘); ???????var oBut2 = document.getElementById(‘btn2‘); ???????oBut1.onclick = function(){ ???????????var oScript = document.createElement(‘script‘); ???????????oScript.src = ‘jsonP.php?callback=fn1‘; ???????????document.body.appendChild(oScript); ???????}; ???????????????oBut2.onclick = function(){ ???????????var oScript = document.createElement(‘script‘); ???????????oScript.src = ‘jsonP.php?callback=fn2‘; ???????????document.body.appendChild(oScript); ???????}; ???};</script></head><body> ???<input type="button" id="btn1" value="加载数字"/> ???<ul id="ul1"></ul> ???<input type="button" id="btn2" value="加载字母"/> ???<ul id="ul2"></ul></body></html><?php//$t = isset($_GET[‘t‘]) ? $_GET[‘t‘]:‘num‘;$t = isset($_GET[‘t‘]) ? $_GET[‘t‘] : ‘num‘;$callback = isset($_GET[‘callback‘]) ? $_GET[‘callback‘] : ‘fn1‘;$arr1 = array(‘111111‘,‘22222222‘,‘33333333‘,‘4444444‘,‘555555555555555555555‘);$arr2 = array(‘aaaaaaaaaaaa‘,‘bbbbbbbb‘,‘cccccccccccc‘,‘ddddddddd‘,‘eeeeeeeeeeee‘);if ($callback == ‘fn1‘) { ???$data = json_encode($arr1);} else { ???$data = json_encode($arr2);}echo $callback.‘(‘.$data.‘);‘;ajax jsonP 解决跨域问题
原文地址：https://www.cnblogs.com/moon-yyl/p/9265418.html