phpコールバック関数callback関数の例

<?php

//            .

$text = "April fools day is 04/01/2002
";

$text.= "Last christmas was 12/24/2001
";

//     

function next_year($matches)

{

  //   : $matches[0]      

  // $matches[1]           

  //     

  return $matches[1].($matches[2]+1);

}

echo preg_replace_callback(

            "|(\d{2}/\d{2}/)(\d{4})|",

            "next_year",

            $text);



?>

しゅつりょく

April fools day is 04/01/2003

Last christmas was 12/24/2002