Question

我正在写一个刮刀，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个内容。然而，当我回应它的底部时，它总是只选择第一个东西。

我认为在阵列中有所有选定的东西呢？我需要将它们保存在变量中，但不知道如何访问它们。

Answer 1

$match2[1]只包含一个匹配项。尝试使用$match2

foreach($match2 as $info) echo $info."<br/>";

Answer 2

你不应该我们正则表达式来解析html，这是一个简单的函数，我把它放在一起使用domDocument加上curl更快。

刮刮示例：

查找具有a属性的所有链接onmouseout 值为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
        )
 ...

 ...
*/
?>

或者第二个示例寻找div class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中包含的图片：

获取img

的所有onclicks代码

<?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功能：

<?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;
}
?>

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;
}
?>

希望它有所帮助。

在regexp中选择几个项目

2 个答案: