PHP regular adds version information to css and js links (example)

$html = <<< HTML





HTML;

$ver    = '1.0.3';
$p      = "/($html   = preg_replace_callback($p, create_function('$m', 'return $m[1].$m[2].(strpos($m[2], "?")?"&":"?")."_v='.$ver.'";'), $html);
echo $html;

执行结果：