我正在尝试创建一个简单的web元素,根据请求,使用:php / ajax / jquery检索网页的页面标题/元描述。
我有一点工作,虽然我不确定如何准备PHP中的返回信息和成功,因此$ title出现在输入字段中,$ description出现在单独的输入字段中。
目前它只返回一个回声块。
HTML
<a href="javascript:retrievepageinformation()" >Action request</a>
<div>The URL</div>
<input name="theaddress" type="text" id="theaddress" value="http://">
<div>The result</div>
<input name="title" id="title" value="" />
<input name="description" id="description" value="" />
的Javascript
function retrievepageinformation () {
$("#title").val('Retrieving..');
$("#description").val('Retrieving..');
var dataqueryurl = $("#theaddress").val();
$.ajax({
type: "POST",
url: "request-information.php",
data: "dataqueryurl="+ dataqueryurl,
success: function(dataresult){
$("#title").ajaxComplete(function(){
$(this).val(dataresult);
});
}
});
}
PHP (request-information.php)
if(isSet($_POST['dataqueryurl'])) {
function file_get_contents_curl($url)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
$dataqueryurl = $_POST['dataqueryurl'];
$html = file_get_contents_curl($dataqueryurl);
//parsing begins here:
$doc = new DOMDocument();
@$doc->loadHTML($html);
$nodes = $doc->getElementsByTagName('title');
// Get and display what you need:
$title = $nodes->item(0)->nodeValue;
$metas = $doc->getElementsByTagName('meta');
for ($i = 0; $i < $metas->length; $i++)
{
$meta = $metas->item($i);
if($meta->getAttribute('name') == 'description')
$description = $meta->getAttribute('content');
}
// Data to pass back to input field 'Title'
echo $title;
// Data to pass back to input field 'Description'
echo $description;
}
答案 0 :(得分:1)
要从 request-information.php 传回信息,您可以使用 array 和 json_encode 的概念。
function file_get_contents_curl($ url) { $ ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
$ dataqueryurl = $ _POST [&#39; dataqueryurl&#39;];
$ html = file_get_contents_curl($ dataqueryurl);
//解析从这里开始:
$ doc = new DOMDocument();
@ $ doc-&GT; loadHTML($ HTML);
$ nodes = $ doc-&gt; getElementsByTagName(&#39; title&#39;);
//获取并显示您需要的内容:
$ title = $ nodes-&gt; item(0) - &gt; nodeValue;
$ metas = $ doc-&gt; getElementsByTagName(&#39; meta&#39;);
for($ i = 0; $ i&lt; $ metas-&gt; length; $ i ++)
{
$meta = $metas->item($i);
if($meta->getAttribute('name') == 'description'){
$description = $meta->getAttribute('content');
}
}
$ result = array(&#39; title&#39; =&gt; $ title,&#39; desc&#39; =&gt; $ description);
echo json_encode($ result);
}
要在您的javascript中获取此信息,您可以在ajax的成功回调中使用 $。parseJSON()。
function retrievepageinformation(){
$("#title").val('Retrieving..');
$("#description").val('Retrieving..');
var dataqueryurl = $("#theaddress").val();
$.ajax({
type: "POST",
url: "request-information.php",
data: "dataqueryurl="+ dataqueryurl,
success: function(dataresult){
dataresult = $.parseJSON(dataresult);
$("#title").val(dataresult.title);
$("#description").val(dataresult.desc);
}
});
}
答案 1 :(得分:1)
在php方面
echo json_encode(array("title"=>"My title","description"=>"Test description"));
在ajax成功
success: function(dataresult){
$("#title").val(dataresult.title);
$("#description").val(dataresult.description);
}
<强> FYI 强>