How to shift the result of regular php replacement?

How to shift the result of regular php replacement?

$str='
';$a=preg_replace('/\_data=[\"|\']([a-zA-Z0-9\_]+)([\s\"\']*)/eis', "data_array('\\1')", $str);die($a);function data_array($key){$code=add_p("$key");return "$code";}function add_p($v){  $value="
";  return "$value";}

// Obtain the result
**************************************** **************************************** ***************************

>

>

>

**************************************** **************************************** ***************************


Expected results

**************************************** **************************************** ***************************
**************************************** **************************************** ***************************

**************************************** **************************************** ***************************
**************************************** **************************************** ***************************

Reply to discussion (solution)

There is no difference between the two results!

$a=preg_replace('/\s+\_data=[\"|\']([a-zA-Z0-9\_]+)([\s\"\']*)>/eis', "data_array('\\1')", $str);die($a); function data_array($key){    $code=add_p($key);    return $code;   } function add_p($v){         $value=">
";      return $value;   }

$a=preg_replace('/\s+\_data=[\"|\']([a-zA-Z0-9\_]+)([\s\"\']*)>/eis', "data_array('\\1')", $str);die($a); function data_array($key){    $code=add_p($key);    return $code;   } function add_p($v){         $value=">
";      return $value;   }

Ask: How can I change the html format?

$ Str ='

';

Expected results

**************************************** **************************************** ***************************
**************************************** **************************************** ***************************

$str='
';$a=preg_replace_callback('/<(\w+)\s+\_data=[\"|\']([a-zA-Z0-9\_]+)([\s\"\']*)\s*class="(.+?)"><\/\1>/is', "data_array", $str);die($a);  function data_array($key){    $code=add_p($key[4], $key[2]);    return $code;   }  function add_p($class, $id){         $value="
";      return $value;   }