复制代码 代码如下:

function showtext($text){

$search = array('|(http://[^ ]+)|', '|(https://[^ ]+)|', '|(www.[^ ]+)|');

$replace = array('<a href="$1" target="_blank">$1</a>', '<a href="$1" target="_blank">$1</a>', '<a href="http://$1" target="_blank">$1</a>');

$text = preg_replace($search, $replace, $text);

return $text;

}