使用PHP與正則表達式

Question

我要替換字符串用相同的哈希標籤哈希標籤，但添加鏈接到它後更換正則表達式

例子：

$text = "any word here related to #English must #be replaced." 

我想

來代替每個主題標籤

#English ---> <a href="bla bla">#English</a> 
#be ---> <a href="bla bla">#be</a> 

所以outpu應該是這樣的：

$text = "any word here related to <a href="bla bla">#English</a> must <a href="bla bla">#be</a> replaced." 

感謝

Answer 1

$input_lines="any word here related to #English must #be replaced."; 
preg_replace("/(#\w+)/", "<a href='bla bla'>$1</a>", $input_lines); 

DEMO

輸出：

any word here related to <a href='bla bla'>#English</a> must <a href='bla bla'>#be</a> replaced. 

Answer 2

這應該輕移你在正確的方向：

echo preg_replace_callback('/#(\w+)/', function($match) { 
    return sprintf('<a href="https://www.google.com?q=%s">%s</a>', 
     urlencode($match[1]), 
     htmlspecialchars($match[0]) 
    ); 
}, htmlspecialchars($text)); 

參見：preg_replace_callback()