看起来不像链接的链接

Question

我有一些代码可以获取页面的所有 link，但有些代码获取的 link 看起来不像 link。例如，索引 0-4 得到的 link 称为 "javascript:void(0)"，而索引 5 得到一个只有“/”的空白 link。我该如何解决？谢谢。

$content = file_get_contents("http://bestspace.co"); //get content of page

$links = "<a\s[^>]*href=(\"??)([^\" >]*?)\1[^>]*>(.*)<\/a>"; //set regular expression to get links
preg_match_all("/$links/siU", $content, $matches); //get all links on page and store in array $matches[2]

print_r($matches[2]);

数组的内容

Array ( 

[0] => javascript:void(0) 
[1] => javascript:void(0) 
[2] => javascript:void(0) 
[3] => javascript:void(0) 
[4] => javascript:void(0) 
[5] => / 
[6] => /bestdeals 
[7] => /about-us 
[8] => /why-choose-us 
[9] => /products 
[10] => https://cloud.bestspace.co/clientarea.php 

ect... );

Answer 1

使用 array_filter 删除所有 Javascript 链接。

$links = array_filter($matches[2], function($x) {
    return substr($x, 0, 11) != 'javascript:';
});

看起来不像链接的链接

Links that doesn't look like links

javascript

php

hyperlink

web-crawler

permalinks