PHP 利用AJAX获取网页并输出的实现代码(Zjmainstay)
看点：
1、file_get_contents超时控制。
2、页面编码判断。
3、键盘Enter键捕捉响应。
4、键盘event兼容处理。//event = event || window.event;
5、XMLHttpRequest 和 jQuery 两种实现方案。
6、页面及源码同时展示。
XMLHttpRequest版本 get_web.PHP
<div class="codetitle"><a style="CURSOR: pointer" data="27651" class="copybut" id="copybut27651" onclick="doCopy('code27651')"> 代码如下:
<div class="codebody" id="code27651">
<?
PHP header("Content-type: text/html; charset=utf-8");
if(!empty($_POST['input_text'])) {
ini_set('default_socket_timeout',10);
if(!$data = file_get_contents($_POST['input_text'])) {
echo "Time out!";
return ;
}
$charset_pos = stripos($data,'charset');
if($charset_pos) {
if(stripos($data,'utf-8',$charset_pos)) {
echo iconv('utf-8',$data);
}else if(stripos($data,'gb2312',$charset_pos)) {
echo iconv('gb2312','gbk',$charset_pos)) {
echo iconv('gbk',$data);
}
return;
}
echo $data;
}else {
?>
<!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">
Get Web Page <script type="text/javascript">
function createXMLHTTP()
{
try
{
var request = new XMLHttpRequest();
}
catch(e1)
{
var arrVersions = ["Microsoft.XMLHTTP","MSXML2.XMLHttp.4.0",
"MSXML2.XMLHttp.3.0","MSXML2.XMLHttp.5.0"];
for(var i=0;i < arrVersions.length;i++){
try{
request = new ActiveXObject(arrVersions[i]);
}catch(e2){
request = false;
}
}
}
return request;
}
function ajax_post(url,params,target_id)
{
request = new createXMLHTTP();
request.onreadystatechange = function() {
if (this.readyState == 4)
if (this.status == 200)
if (this.responseText != null)
document.getElementById(target
id).innerHTML = this.responseText;
}
request.open("POST",url,true);
request.setRequestHeader("Content-type","application/x-www-form-urlencoded");
request.setRequestHeader("Content-length",params.length);
request.setRequestHeader("Connection","close");
request.send(params);
}
var checked = false;
function check(value) {
checked = value;
}
function get_key(event) {
event = event || window.event;
if(event.keyCode==13 && checked != false)
{
var url = document.getElementById('input_text').value;
if(url != '') {
get_page();
}else {
document.getElementById('input_text').onfocus();
return false;
}
}
}
function get_page() {
var url = document.getElementById('input_text').value;
if(!url) {
return false;
}else {
if(document.getElementById('output_page').innerHTML != '') {
document.getElementById('output_page').innerHTML = '';
}
}
if(url.indexOf('http://') == -1) {
url = '
http://'+url;
}
ajax_post(
'<?php echo $_SERVER['PHP_SELF']; ?>',
'input_text='+url,
'output_page'
);
document.getElementById('click_show').style.display = 'block';
document.getElementById('back_a').href = document.location.href;
document.getElementById('origin
website').href = url;
}
<body onkeydown="getkey(event)">
<div class="divBox">
<input id="inputtext" class="inputBox" type="text" value="" onclick="check(true)" onblur="check(false)">
<div id="clickshow" class="hideBox">
<a id="origin_website" class="a_box" href="#" target="_black">访问原站
<a id="back_a" class="abox" href="#">后退
