php nl2br() strtoupper() strtolowe() ucfirst() ucwords()

<?php
    $aline = "功蓋三分國，/n名成八陣圖。/n江流石不轉，/n遺恨失吞吳。/n";
    echo $aline;
    echo "/n/n";
    echo nl2br("/n/n");  //將/n轉化成
並換行
    echo nl2br($aline);
?>

<?php
    $text = "When it's tough, do it tough";
    echo nl2br("/n".$text."/n");
    echo nl2br(strtoupper($text)."/n");
    echo nl2br(strtolower($text)."/n");
    echo nl2br(ucfirst($text)."/n");
    echo nl2br(ucwords($text)."/n");
?>