我今天运行一个约会网站，为了不失去会员，我想阻止用户互相发送Facebook链接。他们有一个文本区域，他们在其中编写对话，并将其插入到MySQL数据库中。
现在，当他们写他们的Facebook地址时，我想这样做：
https://www.facebook.com/my.nick
在封面中替换为以下文字：
i like you
有什么好的PHP例子可以做到这一点吗？/切尔兹
您可以将
preg_replace用作
$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
或更好地使用
$str = preg_replace('/'b((https?:'/'/|www)'S+)/i', 'my new text',$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])