PHP模板引擎如何實現
阿新 • • 發佈：2019-02-03
<pre name="code" class="php">原文連結：http://segmentfault.com/q/1010000002482919/a-1020000002486019 <?php /**************** * 核心檔案 * @discription: 編寫簡單的模板引擎 */ define('INVIEW', true); class view { var $tpl_dir = 'template'; var $cache_dir = 'cache'; var $tpl_ext = '.html'; var $var_left = '{'; var $var_right = '}'; function __construct($config=array()) { extract($config); if(isset($tpl_dir))$this->tpl_dir = $tpl_dir; if(isset($cache_dir))$this->cache_dir = $cache_dir; if(isset($tpl_ext))$this->tpl_ext = $tpl_ext; if(isset($var_left))$this->var_left = $var_left; if(isset($var_right))$this->var_right = $var_right; } function load($tplfilename) { $tplfile = $this->tpl_dir.'/'.$tplfilename.$this->tpl_ext; if(!file_exists($tplfile)) die('Template not found: '.$tplfile); return $this->cache($tplfilename, $tplfile); } //判斷模板是否快取，如模板檔案有更改則重新編譯 function cache($tplname, $tpl_file) { $cache_file = $this->cache_dir.'/'.md5($tplname).'.php'; if(!file_exists($cache_file) || filemtime($tpl_file)>filemtime($cache_file)) $this->compile($tpl_file, $cache_file); return $cache_file; } //編譯模板內容到PHP格式，並寫入快取 function compile($tpl, $cache) { $body = file_get_contents($tpl); $vl = $this->var_left; $vr = $this->var_right; $patterns = array(//#是定界符，#i代表大小寫不敏感 "#$vl\s*include:(.+?)\s*$vr#i", "#$vl\s*if\s+(.+?)\s*$vr#i", "#$vl\s*else\s*$vr#i", "#$vl\s*elseif\s+(.+?)\s*$vr#i", "#$vl\s*endif\s*$vr#i", "#$vl\s*/if\s*$vr#i", "#$vl\s*foreach\s+(.+?):(.+?)\s*$vr#i", "#$vl\s*endforeach\s*$vr#i", "#$vl\s*/foreach\s*$vr#i", "#$vl([0-9a-zA-Z_]+?)\.([0-9a-zA-Z_]+?)\.([0-9a-zA-Z_]+?)$vr#i", "#$vl([0-9a-zA-Z_]+?)\.([0-9a-zA-Z_]+?)$vr#i", "#$vl([0-9a-zA-Z_\[\]\'\"]+?)$vr#i", "#$vl([0-9a-zA-Z_]+?):(.*?)$vr#i" ); $replacements = array( "<?php include show('\\1'); ?>", "<?php if(\\1): ?>", "<?php else: ?>", "<?php elseif(\\1): ?>", "<?php endif; ?>", "<?php endif; ?>", "<?php if(count($\\1)>0):\$autoindex=0;foreach($\\1 as \\2):\$autoindex++; ?>", "<?php endforeach;endif; ?>", "<?php endforeach;endif; ?>", "<?php echo $\\1['\\2']['\\3']; ?>", "<?php echo $\\1['\\2']; ?>", "<?php echo $\\1; ?>", "<?php echo \\1(\\2); ?>" ); $body = preg_replace($patterns, $replacements, $body); file_put_contents($cache, "<?php if(!defined('INVIEW'))die('YIQU'); ?>".$body); } } $view = new view(); function show($tpl) { global $view; return $view->load($tpl); } ?>
上面就是一個模版引擎了，看看如何使用
php 使用示例
<?php
include 'view.php';
$title = '文件標題';
$a=array('a'=>'rows','b'=>array('c'=>'inarray'));
include show('index');
?>
模版使用示例
<html> <head> <title>{title}</title> <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/> </head> <body> 你好，僅供參考<br/> {a.a} {a.b.c}<br/> {foreach a:$v} {autoindex}.{v}<br/> {/foreach} </body> </html> {include:footer}
我自己寫的，模仿tp的模板替換規則。
$vl=$GLOBALS['config']['left_delim'].'\$';//{$ $vr=$GLOBALS['config']['right_delim'];//} $pattern = array( "#$vl(.+?)\s*$vr#", ); $replacement =array( '<?php echo $this->tpl_var["\\1"]; ?>', ); $cont =preg_replace($pattern ,$replacement,$cont); file_put_contents($com_file,$cont);