1

我正在写一个刮板，我有以下代码：

        //Open link prepended with domain
        $link='http://www.domain.de/'.$link;
        $data=@file_get_contents($link);
        $regex='#<span id="bandinfo">(.+?)<br><img src=".*?"  title=".*?" alt=".*?" >&nbsp;(.+?)&nbsp;(.+?)<br>(.+?)<br><a href=".*?">Mail-Formular</a>&nbsp;<img onmouseover=".*?" onmouseout=".*?" onclick=".*?" style=".*?" src=".*?" alt=".*?">&nbsp;<br><a href="tracklink.php.*?>(.+?)</a></span>#';
        preg_match_all($regex,$data,$match2);
        foreach($match2[1] as $info) echo $info."<br/>";

如您所见，我需要在正则表达式中选择几项内容。但是，在我回显它的底部时，它总是只给出选择的第一件事。

我以为在数组中有所有选择的东西呢？我需要将它们保存在变量中，但不知道如何访问它们。

4

2 回答 2

0

$match2[1]仅包含一个匹配项。尝试使用$match2

foreach($match2 as $info) echo $info."<br/>";
于 2012-06-09T21:53:52.240 回答
0

您不应该使用正则表达式来解析 html，这是我放在一起的一个简单函数，它使用 domDocument 和 curl 更快。

示例刮：

查找a具有onmouseout值为 的属性的所有链接return nd();：

<?php 
$link = 'http://www.bandliste.de/Bandliste/';
$data=curl_get($link, $link);
$info = DOMParse($data,'a','onmouseout','return nd();');
print_r($info);
/*
Array
(
    [0] => Array
        (
            [tag] => a
            [onmouseout] => return nd();
            [text] => Martin und Kiehm
        )

    [1] => Array
        (
            [tag] => a
            [onmouseout] => return nd();
            [text] => Blues For Three
        )

    [2] => Array
        (
            [tag] => a
            [onmouseout] => return nd();
            [text] => Phrase Applauders
        )
 ...

 ...
*/
?>

或第二个示例寻找div具有class名为的属性bandinfo：

<?php
$link = 'Bands/Falling_For_Beautiful/14469/';
$link='http://www.bandliste.de/'.$link;
$data=curl_get($link, $link);
$info = DOMParse($data,'div','class','bandinfo');
/*
Array
(
[0] => Array
(
[tag] => div
[class] => bandinfo
[text] => What? We are Falling For Beautiful and we make music. And basically  thats it. Sound? Rock. Indie. Alternative. Pop. Who? Adrianne (Vocals/Guitar) Nina (Guitar/Special Effects) Bianca (Bass) Marisa (Drums) When? Some of us started having a band in 2003  we played tons of gigs, covered tons of songs, started writing our own songs. In 2008 we decided to forget about that and founded FFB. So we started to write songs and arranged them. We made them sound simple and catchy focusing on lyrics. Our songs are about life.  Booking: Bianca Untertrifallerhttp://www.fallingforbeautiful.com
)

)
*/
?>

或某些 javascript 中的 onclick 中包含的图像：

获取所有img标签onclicks

<?php
$img = DOMParse($data,'img','onclick');
//Then find the image we are looking for
function parse_img($array){
    foreach($array as $value){
        if(strstr($value['onclick'],"Band Foto")){
            preg_match('#window.open\(\'(.*?)\', \'Band Foto\'#',$value['onclick'],$match);
            return $match[1];
        }
    }
}
//echo parse_img($img); //bandfoto-14469.jpg
?>

实际的dom函数：

<?php
function DOMParse($source,$tags,$attribute=null,$attributeValue=null){
    header('Content-Type: text/html; charset=utf-8');
    $return = array();
    $dom = new DOMDocument("1.0","UTF-8");
    @$dom->loadHTML($source);
    $dom->preserveWhiteSpace = false;

    foreach($dom->getElementsByTagName($tags) as $ret) {
        //No attribute to look for so return only nodeValue
        if($attribute==null){
            if(trim($ret->nodeValue)==''){continue;}
            $return[] = array('tag'=>$tags,'text'=>preg_replace('/\s+/', ' ',$ret->nodeValue));
        }else{
            //Attribute not null look for eg: src, href, class ect
            if(trim($ret->nodeValue)=='' && $ret->getAttribute($attribute)==''){continue;}

            //If we looking for specific value from an attribute containg an attibute value
            if($attributeValue!=null){
                if($ret->getAttribute($attribute)==$attributeValue){
                    $return[] = array('tag'=>$tags,$attribute=>$ret->getAttribute($attribute),'text'=>preg_replace('/\s+/', ' ',$ret->nodeValue));
                }
            }else{
                $return[] = array('tag'=>$tags,$attribute=>$ret->getAttribute($attribute),'text'=>preg_replace('/\s+/', ' ',$ret->nodeValue));
            }

        }
    }
    return $return;
}
?>

和卷曲功能：

<?php
function curl_get($url, $referer){
    //check curl is installed or revert back to file_get_contents
    $return = (function_exists('curl_init')) ? '' : false;
    if($return==false){return file_get_contents($url);}

    $curl = curl_init();
    $header[0] = "Accept: text/xml,application/xml,application/json,application/xhtml+xml,";
    $header[0] .= "text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
    $header[] = "Cache-Control: max-age=0";
    $header[] = "Connection: keep-alive";
    $header[] = "Keep-Alive: 300";
    $header[] = "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7";
    $header[] = "Accept-Language: en-us,en;q=0.5";
    $header[] = "Pragma: ";

    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 5.1; rv:5.0) Gecko/20100101 Firefox/5.0 Firefox/5.0');
    curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
    curl_setopt($curl, CURLOPT_HEADER, 0);
    curl_setopt($curl, CURLOPT_REFERER, $referer);
    curl_setopt($curl, CURLOPT_ENCODING, 'gzip,deflate');
    curl_setopt($curl, CURLOPT_AUTOREFERER, true);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($curl, CURLOPT_TIMEOUT, 30);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);

    $html = curl_exec($curl);
    curl_close($curl);
    return $html;
}
?>

希望能帮助到你。

于 2012-06-09T22:57:45.933 回答