晒一下我的模板引擎，欢迎拍砖

本帖最后由 xuzuning 于 2012-05-23 15:02:49 编辑

别不多说，直接上代码
template.php（3.55K）

<?phpclass template {  protected $data = array();  protected $drillmode = 0;  function __construct($s) {	if(file_exists($s)) $s = file_get_contents($s);	$this->find_var($s);	$this->data = explode('data[0] = '<?php $_st=$_var=array();?>';	$this->find_dsn();  }  //新增 run 方法，  function run() {	//include "data://," . join('data);	eval('?>' . join('data));  }  function find($pattern) {	$this->pattern = $pattern;	return array_filter($this->data, array($this, 'find_callback'));  }  private function find_dsn() {	foreach($this->find("#\bdsn\b#i") as $k=>$v) {		$t = $this->find_tag($tag = strtok($v, ' '), $k);		end($t);		$dsn[] = array( $k, key($t) );	}	if($this->drillmode) {		foreach($this->find("#\bdrill\b#i") as $k=>$t) {			foreach($dsn as $i=>$v) if($k  $v[0]) $t = $i;			$drill[] = $dsn[$t];			unset($dsn[$t]);		}	}	foreach($dsn as $v) {		list($start, $end) = $v;		preg_match('/\bdsn\s*=\s*([^\s>]+)/i', $this->data[$start], $reg);		$this->data[$start] = str_replace(' '.$reg[0], '', $this->data[$start]);		$m = explode(',', trim($reg[1], '\'"')) + array(0, 0, '');		$code_start = "?php if(isset(\$_var))\$_st[]=\$_var;foreach((isset(\$_var['$m[0]'])?\$_var['$m[0]']:\$this->$m[0]('$m[1]','$m[2]')) as \$_key=>\$_var){?>";		$code_end = "?php }\$_var=array_pop(\$_st);?>";		switch($m[1]) {			case 0:				$t = explode('>', $this->data[$start]);				$t[1] = "data[$start] = join('>', $t);				$this->data[$end] = "$code_enddata[$end];				break;			case 1:				$this->data[$end] .= "data[$start] = "$code_startdata[$start];				break;			default:				$n = round(100/$m[1]);				$this->data[$end] .= "</dt>data[$start] = "$code_start<dt style='float:left;width:$n%;margin:0px;padding:0px'>data[$start];				break;		}	}	if($this->drillmode) foreach($drill as $v) {		list($start, $end) = $v;		preg_match('/\bdsn\s*=\s*([^\s>]+)/i', $this->data[$start], $reg);		$this->data[$start] = str_replace(' '.$reg[0], '', $this->data[$start]);		$m = explode(',', trim($reg[1], '\'"')) + array(0, 0, '');		$code = '';		for($i=$start; $i<=$end; $i++) {			$code .= 'data[$i];			if($i > $start) unset($this->data[$i]);		}		$code = addslashes($code);		$this->data[$start] = "?php \$_code='$code';\$this->drill(\$_code, isset(\$_var['$m[0]'])?\$_var['$m[0]']:\$this-<em style="color:transparent">本@文来源[email protected]搞@^&代*@码网(</em><q>搞代gaodaima码</q>>$m[0]('$m[1]','$m[2]'));?>";	}  }  protected function find_tag($tag, $offs=0) {	$r = array();	$counter = 0;	foreach($this->find("#^/?$tag#i") as $k=>$v) {		if($k >= $offs) {			$counter += $v{0} == '/' ? 1 : -1;			$r[$k] = $v;			if($counter == 0) break;		}	}	return $r;  }  protected function find_callback($v) {	return preg_match($this->pattern, $v);  }  private function find_var(&$s) {	$s = preg_replace_callback('/\{(\w+)\}/', array($this, 'var_callback'), $s);  }  protected function var_callback($r) {	if($r[1] == 'drill') {		$this->drillmode++;		return '<?php if(isset($_var[\'child\'])) $this->drill($_code, $_var[\'child\']);?>';	}	return "<?php echo isset(\$_var['$r[1]'])?\$_var['$r[1]']:'';?>";  }  protected function drill($_code, $_source) {  	if(empty($_source) || ! is_array($_source)) return array();  	foreach($_source as $_key=>$_var) {		//include 'data://,' . $_code;		eval('?>' . $_code);  	}  }  function __call($func, $param) {	if(function_exists($func)) return call_user_func_array($func, $param);	return array();  }  function __toString() {	return join('data);  }}

补充一下
模板中只有两种控制元素：
1、模板变量 用花括号括起的变量名，如 {var}。提供数据的函数应提供对应的数据，如没有提供则自动为空
2、数据源声明 位于 HTML 标记中的 dsn 属性，比如

{t}

其中 foo 表示提供数据的函数，1 表示充填数据时，循环是包含自身的 比如返回的数据是 array(array(‘t’=>1,array(‘t’=>2))
则实际生成的 html 是

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