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我正在使用 cUrl 提取网站的内容。然后我想浏览所有内容并获取所有超链接（仅限锚标签），我没有太多运气使用正则表达式，并被指向 loadXML(contents) 和 loadHTML(contents) 方向。对于初学者，我不确定我正在检查的网站是 XHTML (loadXML) 还是纯 html，在这种情况下我会使用 HTML，而且当我使用任何一种时，我都会收到诸如“开始和结束标签不匹配”之类的错误。我按照其他人的建议尝试了 strictErrorChecking = FALSE 和 libxml_use_internal_errors(true) ，还尝试了 tidy_parse_string ，但这没有返回任何内容。只是想知道是否有人有类似的问题或知道另一种方法，也许有一个简单的正则表达式来获取所有超链接？

谢谢

4

1 回答 1

1

那是一条漫长的路……你为什么不直接使用file_get_html http://simplehtmldom.sourceforge.net

例子

include 'simple_html_dom.php';
$url = "http://php.net/";
$html = file_get_html ( $url );
echo "<pre>";
foreach ( $html->find ( 'a' ) as $element ) {
    $link = $element->href;
    $link = ltrim ( $link, "/" );

    if (!preg_match ( "/http/i", $link )) {
        $link = $url . $link;
    }
    echo $link . PHP_EOL;
    flush ();
}

输出

http://php.net/
http://php.net/downloads.php
http://php.net/docs.php
http://php.net/FAQ.php
http://php.net/support.php
http://php.net/mailing-lists.php
http://php.net/license
https://wiki.php.net/
https://bugs.php.net/
http://php.net/sites.php
http://php.net/links.php
http://php.net/conferences/
http://php.net/my.php
http://php.net/tut.php
http://php.net/docs.php
http://php.net/links.php
http://php.net/usage.php
http://php.net/thanks.php
http://www.easydns.com/?V=698570efeb62a6e2
http://www.directi.com/
http://promote.pair.com/direct.pl?php.net
http://www.servercentral.net/
http://www.hostedsolutions.com/
http://www.spry.com/
http://www.osuosl.org
http://www.yahoo.com/
http://www.nexcess.net/
http://www.rackspace.com/
http://www.eukhost.com/
http://www.sohosted.nl/webhosting/
http://www.redpill-linpro.com
http://www.facebook.com
http://krystal.co.uk
http://servergrove.com/
http://www.bauer-kirch.de/
http://www.apache.org/
http://www.mysql.com/
http://www.postgresql.org/
http://www.zend.com/
http://www.linuxfund.org/
http://ostg.com/
http://php.net/feed.atom
http://php.net/downloads.php#v5
http://php.net/downloads.php#v5
http://php.net/submit-event.php
http://php.net/cal.php?id=2662
http://php.net/cal.php?id=3422
http://php.net/cal.php?id=4019
http://php.net/cal.php?id=1099
http://php.net/cal.php?id=4767
http://php.net/cal.php?id=1745
http://php.net/cal.php?id=1860
http://php.net/cal.php?id=2301
http://php.net/cal.php?id=2814
http://php.net/cal.php?id=3294
http://php.net/cal.php?id=2352
http://php.net/cal.php?id=2682
http://php.net/cal.php?id=3793
http://php.net/cal.php?id=109
http://php.net/cal.php?id=272
http://php.net/cal.php?id=561
http://php.net/cal.php?id=1005
http://php.net/cal.php?id=1304
http://php.net/cal.php?id=1624
http://php.net/cal.php?id=1632
http://php.net/cal.php?id=1706
http://php.net/cal.php?id=1918
http://php.net/cal.php?id=2017
http://php.net/cal.php?id=2418
http://php.net/cal.php?id=2734
http://php.net/cal.php?id=2932
http://php.net/cal.php?id=3416
http://php.net/cal.php?id=3861
http://php.net/cal.php?id=4014
http://php.net/cal.php?id=4147
http://php.net/cal.php?id=4799
http://php.net/cal.php?id=153
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http://php.net/cal.php?id=3722
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http://php.net/cal.php?id=5222
http://php.net/cal.php?id=1545
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http://php.net/cal.php?id=2208
http://php.net/cal.php?id=3925
http://php.net/cal.php?id=1704
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http://php.net/cal.php?id=4507
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http://php.net/cal.php?id=1346
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http://php.net/cal.php?id=2449
http://php.net/cal.php?id=409
http://php.net/cal.php?id=384
http://php.net/cal.php?id=3075
http://php.net/cal.php?id=3653
http://php.net/cal.php?id=5135
http://php.net/cal.php?id=4256
http://php.net/cal.php?id=5052
http://php.net/cal.php?id=2662
http://php.net/cal.php?id=3422
http://php.net/cal.php?id=4019
http://php.net/cal.php?id=1099
http://php.net/cal.php?id=4648
http://php.net/cal.php?id=4767
http://php.net/cal.php?id=2527
http://php.net/cal.php?id=2600
http://php.net/cal.php?id=2660
http://php.net/cal.php?id=4626
http://php.net/cal.php?id=5276
http://php.net/cal.php?id=2500
http://php.net/cal.php?id=4922
http://php.net/cal.php?id=1316
http://php.net/cal.php?id=1708
http://php.net/cal.php?id=2499
http://php.net/cal.php?id=841
http://php.net/cal.php?id=1490
http://php.net/cal.php?id=5187
http://php.net/cal.php?id=2144
http://php.net/cal.php?id=3703
http://php.net/cal.php?id=5289
http://php.net/cal.php?id=5305
http://php.net/cal.php?id=1516
http://php.net/cal.php?id=2702
http://php.net/cal.php?id=3560
http://php.net/cal.php?id=2023
http://php.net/cal.php?id=4230
http://php.net/cal.php?id=338
http://php.net/cal.php?id=456
http://php.net/cal.php?id=641
http://php.net/cal.php?id=998
http://php.net/cal.php?id=1198
http://php.net/cal.php?id=1360
http://php.net/cal.php?id=1981
http://php.net/cal.php?id=2051
http://php.net/cal.php?id=3053
http://php.net/cal.php?id=5193
http://php.net/cal.php?id=5190
http://php.net/cal.php?id=5191
http://php.net/cal.php?id=5188
http://php.net/cal.php?id=5186
http://php.net/cal.php?id=5185
http://php.net/cal.php?id=5184
http://php.net/cal.php?id=5298
http://php.net/cal.php?id=5308
http://php.net/cal.php?id=3385
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http://php.net/cal.php?id=1466
http://php.net/cal.php?id=1583
http://php.net/cal.php?id=5125
http://php.net/cal.php?id=5228
http://php.net/cal.php?id=5194
http://php.net/cal.php?id=5251
http://php.net/cal.php?id=1389
http://php.net/cal.php?id=2408
http://php.net/cal.php?id=1200
http://php.net/cal.php?id=2589
http://php.net/cal.php?id=5247
http://php.net/cal.php?id=5279
http://php.net/cal.php?id=5303
http://php.net/cal.php?id=231
http://php.net/cal.php?id=5192
http://php.net/cal.php?id=5309
http://php.net/cal.php?id=1137
http://php.net/cal.php?id=4220
http://www.php.net/conferences/index.php#id2012-01-20-1
http://www.php.net/conferences/index.php#id2011-12-23-1
http://www.php.net/conferences/index.php#id2012-02-09-1
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http://php.net/ChangeLog-5.php
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http://qa.php.net
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http://git.php.net/?p=php-src.git;a=blob;f=NEWS;h=d647f8de7cf080b599a73e092d683273fbf744e8;hb=fa1437b144683eae4d253473c35e375f7b743811
http://php.net/mailto:php-qa@lists.php.net
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http://php.net/downloads.php
http://windows.php.net/download/
http://php.net/archive/index.php
http://php.net/feed.atom
http://php.net/source.php?url=/index.php
http://php.net/credits.php
http://php.net/stats/
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http://php.net/mirrors.php
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http://developer.yahoo.com/
于 2012-04-27T16:51:04.813 回答