從推文中查找URL，@replies和#hashtags

Question

我正在PHP中構建一個小小的Twitter事物，我試圖解析URL，@replies和#hashtags並將它們變成可點擊的鏈接。

• 的@回覆會鏈接到http://twitter.com/replies

• ＃標籤想http://search.twitter.com/search?q=%23hashtags

我發現一個類解析URL，我想知道，如果這也可以用來解析@replies和#hashtags以及：

// http://josephscott.org/archives/2008/11/makeitlink-detecting-urls-in-text-and-making-them-links/  
class MakeItLink { 
protected function _link_www($matches) { 
    $url = $matches[2]; 
    $url = MakeItLink::cleanURL($url); 
    if(empty($url)) { 
     return $matches[0]; 
    } 

    return "{$matches[1]}<a href='{$url}'>{$url}</a>"; 
} 

public function cleanURL($url) { 
    if($url == '') { 
     return $url; 
    } 

    $url = preg_replace("|[^a-z0-9-~+_.?#=!&;,/:%@$*'()x80-xff]|i", '', $url); 
    $url = str_replace(array("%0d", "%0a"), '', $url); 
    $url = str_replace(";//", "://", $url); 

    /* If the URL doesn't appear to contain a scheme, we 
    * presume it needs http:// appended (unless a relative 
    * link starting with/or a php file). 
    */ 
    if(
     strpos($url, ":") === false 
     && substr($url, 0, 1) != "/" 
     && !preg_match("|^[a-z0-9-]+?.php|i", $url) 
    ) { 
     $url = "http://{$url}"; 
    } 

    // Replace ampersans and single quotes 
    $url = preg_replace("|&([^#])(?![a-z]{2,8};)|", "&#038;$1", $url); 
    $url = str_replace("'", "&#039;", $url); 

    return $url; 
} 

public function transform($text) { 
    $text = " {$text}"; 

    $text = preg_replace_callback(
     '#(?<=[\s>])(\()?([\w]+?://(?:[\w\\x80-\\xff\#$%&~/\-=?@\[\](+]|[.,;:](?![\s<])|(?(1)\)(?![\s<])|\)))*)#is', 
     array('MakeItLink', '_link_www'), 
     $text 
    ); 

    $text = preg_replace('#(<a([^>]+?>|>))<a [^>]+?>([^>]+?)</a></a>#i', "$1$3</a>", $text); 
    $text = trim($text); 

    return $text; 
} 
} 

Answer 1

我想你要做的基本上是什麼我已經包含在下面。在return語句之前，您可以在transform方法中添加這兩個語句。

$text = preg_replace('#@(\w+)#', '<a href="http://twitter.com/$1">$0</a>', $text); 
$text = preg_replace('/#(\w+)/', '<a href="http://twitter.com/search?q=%23$1&src=hash">$0</a>', $text); 

這是你在找什麼？

Answer 2

推特recently released開源java和ruby（gem）他們用於查找用戶名，哈希標記，列表和URL的代碼的實現。

它是非常正則表達式。