这里自动匹配页面里的网址，包含http，ftp等，自动给网址加上链接
function text2links($str='') { if($str=='' or !preg_match('/(http|www\.|@)/i', $str)) { return $str; } $lines = explode("\n", $str); $new_text = ''; while (list($k,$l) = each($lines)) { // replace links: $l = preg_replace("/([ \t]|^)www\./i", "\\1", $l); $l = preg_replace("/([ \t]|^)ftp\./i", "\\1ftp://ftp.", $l); $l = preg_replace("/(http:\/\/[^ )\r\n!]+)/i", "<a href=https://www.jb51.net/article/\"\\1\">\\1</a>", $l); $l = preg_replace("/(https:\/\/[^ )\r\n!]+)/i", "<a href=https://www.jb51.net/article/\"\\1\">\\1</a>", $l); $l = preg_replace("/(ftp:\/\/[^ )\r\n!]+)/i", "<a href=https://www.jb51.net/article/\"\\1\">\\1</a>", $l); $l = preg_replace( "/([-a-z0-9_]+(\.[_a-z0-9-]+)*@([a-z0-9-]+(\.[a-z0-9-]+)+))/i", "<a href=https://www.jb51.net/article/\"mailto:\\1\">\\1</a>", $l); $new_text .= $l."\n"; } return $new_text; } //使用范例： $text = "Welcome :-)"; print text2links($text);