<p>自动匹配页面里的网址，包含http，ftp等，自动给网址加上链接</p><pre class="brush:php;toolbar:false">functiontext2links($str=''){
if($str==''or!preg_match('/(http|www\.|@)/i',$str)){return$str;}
$lines=explode("\n",$str);$new_text='';
while(list($k,$l)=each($lines)){
//replacelinks:
$l=preg_replace("/([\t]|^)www\./i","\\1http://www.",$l);
$l=preg_replace("/([\t]|^)ftp\./i","\\1ftp://ftp.",$l);
$l=preg_replace("/(http:\/\/[^)\r\n!]+)/i",
"<ahref=\"\\1\">\\1</a>",$l);
$l=preg_replace("/(https:\/\/[^)\r\n!]+)/i",
"<ahref=\"\\1\">\\1</a>",$l);
$l=preg_replace("/(ftp:\/\/[^)\r\n!]+)/i",
"<ahref=\"\\1\">\\1</a>",$l);
$l=preg_replace(
"/([-a-z0-9_]+(\.[_a-z0-9-]+)*@([a-z0-9-]+(\.[a-z0-9-]+)+))/i",
"<ahref=\"mailto:\\1\">\\1</a>",$l);
$new_text.=$l."\n";
}
return$new_text;
}
//使用范例：
$text="Visitwww.jonasjohn.de:-)";
printtext2links($text);</pre>