程式設計@筆記

<?php

$text = "April fools day is 04/01/2002\n";
$text.= "Last christmas was 12/24/2001\n";

// the callback function
function next_year($matches)
{
// as usual: $matches[0] is the complete match
// $matches[1] the match for the first subpattern
// enclosed in '(...)' and so on
return $matches[1].($matches[2]+1);
}

echo mb_ereg_replace_callback(
"(\d{2}/\d{2}/)(\d{4})",
"next_year",
$text);

?>
以上例程會輸出：

April fools day is 04/01/2003
Last christmas was 12/24/2002