用PHP替換帶有其他詞的鏈接

Question

今天我正在運行一個交友網站，爲了不失去成員，我想阻止用戶發送Facebook鏈接給對方。 他們有一個textarea他們寫對話，這是插入MySQL數據庫。現在

，我想，當他們寫自己的Facebook ADRESS類似的事：

https://www.facebook.com/my.nick 

與下面的文本在coversation被替換：

i like you 

任何一個優秀的PHP例子在那裏如何這可以做到？ /Cheerz

Answer 1

可以使用的preg_replace作爲

$str = "hello www.facebook.com. this is my fb page http://facebook.com/user-name. 
Here is another one for the profile https://www.facebook.com/my-profile/?id=123. 
"; 

$str = preg_replace('"\b((https?://|www)\S+)"', 'my new text',$str); 

echo $str ; 

output // hello my new text this is my fb page my new text 
      Here is another one for the profile my new text 

或者更好地利用與

$str = preg_replace('/\b((https?:\/\/|www)\S+)/i', 'my new text',$str); 




/\b((https?:\/\/|www)\S+)/i 

\b assert position at a word boundary (^\w|\w$|\W\w|\w\W) 
1st Capturing group ((https?:\/\/|www)\S+) 
    2nd Capturing group (https?:\/\/|www) 
     1st Alternative: https?:\/\/ 
      http matches the characters http literally (case insensitive) 
      s? matches the character s literally (case insensitive) 
       Quantifier: Between zero and one time, as many times as possible, giving back as needed [greedy] 
      : matches the character : literally 
      \/ matches the character/literally 
      \/ matches the character/literally 
     2nd Alternative: www 
      www matches the characters www literally (case insensitive) 
    \S+ match any non-white space character [^\r\n\t\f ] 
     Quantifier: Between one and unlimited times, as many times as possible, giving back as needed [greedy] 
i modifier: insensitive. Case insensitive match (ignores case of [a-zA-Z])