翻译： 

http://sourcemaking.com/design_patterns/template_method

http://sourcemaking.com/design_patterns/template_method/php

abstract class TemplateAbstract {    public final function showBookTitleInfo($book_in) {        $title = $book_in->getTitle();        $author = $book_in->getAuthor();        $processedTitle = $this->processTitle($title);        $processedAuthor = $this->processAuthor($author);        if (NULL == $processedAuthor) {            $processed_info = $processedTitle;        } else {            $processed_info = $processedTitle.' by '.$processedAuthor;        }        return $processed_info;    }     abstract function processTitle($title);      function processAuthor($author) {        return NULL;    } }class TemplateExclaim extends TemplateAbstract {    function processTitle($title) {      return str_replace(' ','!!!',$title);     }    function processAuthor($author) {      return str_replace(' ','!!!',$author);    }}class TemplateStars extends TemplateAbstract {    function processTitle($title) {        return str_replace(' ','*',$title);     }}class Book {    private $author;    private $title;    function __construct($title_in, $author_in) {        $this->author = $author_in;        $this->title  = $title_in;    }    function getAuthor() {return $this->author;}    function getTitle() {return $this->title;}    function getAuthorAndTitle() {        return $this->getTitle() . ' by ' . $this->getAuthor();    }}  writeln('开始测试模版方法');echo PHP_EOL;   $book = new Book('PHP for Cats','Larry Truett');   $exclaimTemplate = new TemplateExclaim();    $starsTemplate = new TemplateStars();   writeln('test 1 - show exclaim template');echo PHP_EOL;  writeln($exclaimTemplate->showBookTitleInfo($book));echo PHP_EOL;  writeln('test 2 - show stars template');echo PHP_EOL;  writeln($starsTemplate->showBookTitleInfo($book));echo PHP_EOL;  writeln('END TESTING TEMPLATE PATTERN');  function writeln($line_in) {    echo $line_in;  }