PHPCMS2008源码模板原理分析
 

<?php
PHPCMS2008模版原理篇

一、config.inc.php 里面关于模版的相关配置变量

//模板相关配置
define('TPL_ROOT', PHPCMS_ROOT.'templates/'); //模板保存物理路径
define('TPL_NAME', 'default'); //当前模板方案目录
define('TPL_CSS', 'default'); //当前样式目录
define('TPL_CACHEPATH', PHPCMS_ROOT.'data/cache_template/'); //模板缓存物理路径
define('TPL_REFRESH', 1); //是否开启模板缓存自动刷新

二、global.func.php 的相关调用函数

function template($module = 'phpcms', $template = 'index', $istag = 0)    //模版调用函数(模块名,模版名,是否tag)
{
$compiledtplfile = TPL_CACHEPATH.$module.'_'.$template.'.tpl.php';       //根据参数生成cache模板php文件
if(TPL_REFRESH && (!file_exists($compiledtplfile) || @filemtime(TPL_ROOT.TPL_NAME.'/'.$module.'/'.$template.'.html') > @filemtime($compiledtplfile) || @filemtime(TPL_ROOT.TPL_NAME.'/tag.inc.php') > @filemtime($compiledtplfile)))
//判断模版生成文件是否过期,或不存在,否则重新生成
{
require_once PHPCMS_ROOT.'include/template.func.php'; //调用模版函数
template_compile($module, $template, $istag);          //生成最新模版相关文件
}
return $compiledtplfile;                                //返回模板生成文件.php文件
}

function tpl_data($module = 'phpcms', $template = 'index')   //生成tpl的数据模板
{
@extract($GLOBALS, EXTR_SKIP);
ob_start();
include template($module, $template);
$data = ob_get_contents();
ob_clean();
return $data;
}

三、template.func.php 的相关函数
<?php
function template_compile($module, $template, $istag = 0)
{
$tplfile = TPL_ROOT.TPL_NAME.'/'.$module.'/'.$template.'.html';   //生成模版名
$content = @file_get_contents($tplfile);                          //加载模版文件
if($content === false) showmessage("$tplfile is not exists!");
$compiledtplfile = TPL_CACHEPATH.$module.'_'.$template.'.tpl.php'; //生成模版cache文件名
$content = ($istag || substr($template, 0, 4) == 'tag_') ? '<?php function _tag_'.$module.'_'.$template.'($data, $number, $rows, $count, $page, $pages, $setting){ global $PHPCMS,$MODULE,$M,$CATEGORY,$TYPE,$AREA,$GROUP,$MODEL,$templateid,$_userid,$_username;@extract($setting);?>'.template_parse($content, 1).'<?php } ?>' : template_parse($content);
//用template_parse正则替换后,形成可以执行的php文件
$strlen = file_put_contents($compiledtplfile, $content); //写到cache里
@chmod($compiledtplfile, 0777);
return $strlen;                       //返回生成值
}

function template_refresh($tplfile, $compiledtplfile)   //单个模版文件的更新
{
$str = file_get_contents($tplfile);
$str = template_parse($str);
$strlen = file_put_contents($compiledtplfile, $str);
@chmod($compiledtplfile, 0777);
return $strlen;
}

function template_module($module)                              //更新一个模块的所有缓存文件
{
$files = glob(TPL_ROOT.TPL_NAME.'/'.$module.'/*.html');    //征收成文件名数组
if(is_array($files))
{
foreach($files as $tpl)
{
$template = str_replace('.html', '', basename($tpl));   //正则取文件名,去掉.html
template_compile($module, $template);                  //重新生成module的cache
}
}
return TRUE;
}

function template_cache()                         //生成所能的模块cache文件
{
global $MODULE;                               //全局变量module 可能是调用的cache.func生成的文件下的变量引入的,暂时没明,下回分解
foreach($MODULE as $module=>$m)
{
template_module($module);
}
return TRUE;
}

function template_block($blockid)                  
{
$tplfile = TPL_ROOT.TPL_NAME.'/phpcms/block/'.$blockid.'.html';
$compiledtplfile = TPL_CACHEPATH.'phpcms_block_'.$blockid.'.tpl.php';
if(TPL_REFRESH && (!file_exists($compiledtplfile) || @filemtime($tplfile) > @filemtime($compiledtplfile)))
{
template_refresh($tplfile, $compiledtplfile);
}
return $compiledtplfile;
}

function template_parse($str, $istag = 0)     
//此函数的最终目地是将,模版文件.html文件,形成/daba/data_templete/module_name.tpl.php 文件,也就是一些正则的转换,和dz的模式差不多
{
$str = preg_replace("/([\n\r]+)\t+/s","\\1",$str);
$str = preg_replace("/\<\!\-\-\{(.+?)\}\-\-\>/s", "{\\1}",$str);
$str = preg_replace("/\{template\s+(.+)\}/","<?php include template(\\1); ?>",$str);
$str = preg_replace("/\{include\s+(.+)\}/","<?php include \\1; ?>",$str);
$str = preg_replace("/\{php\s+(.+)\}/","<?php \\1?>",$str);
$str = preg_replace("/\{if\s+(.+?)\}/","<?php if(\\1) { ?>",$str);
$str = preg_replace("/\{else\}/","<?php } else { ?>",$str);
$str = preg_replace("/\{elseif\s+(.+?)\}/","<?php } elseif (\\1) { ?>",$str);
$str = preg_replace("/\{\/if\}/","<?php } ?>",$str);
$str = preg_replace("/\{loop\s+(\S+)\s+(\S+)\}/","<?php if(is_array(\\1)) foreach(\\1 AS \\2) { ?>",$str);
$str = preg_replace("/\{loop\s+(\S+)\s+(\S+)\s+(\S+)\}/","<?php if(is_array(\\1)) foreach(\\1 AS \\2 => \\3) { ?>",$str);
$str = preg_replace("/\{\/loop\}/","<?php } ?>",$str);
$str = preg_replace("/\{\/get\}/","<?php } unset(\$DATA); ?>",$str);
$str = preg_replace("/\{tag_([^}]+)\}/e", "get_tag('\\1')", $str);
$str = preg_replace("/\{get\s+([^}]+)\}/e", "get_parse('\\1')", $str);
$str = preg_replace("/\{([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff:]*\(([^{}]*)\))\}/","<?php echo \\1;?>",$str);
$str = preg_replace("/\{\\$([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff:]*\(([^{}]*)\))\}/","<?php echo \\1;?>",$str);
$str = preg_replace("/\{(\\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)\}/","<?php echo \\1;?>",$str);
$str = preg_replace("/\{(\\$[a-zA-Z0-9_\[\]\'\"\$\x7f-\xff]+)\}/es", "addquote('<?php echo \\1;?>')",$str);
$str = preg_replace("/\{([A-Z_\x7f-\xff][A-Z0-9_\x7f-\xff]*)\}/s", "<?php echo \\1;?>",$str);
if(!$istag) $str = "<?php defined('IN_PHPCMS') or exit('Access Denied'); ?>".$str;
return $str;
}

function get_tag($tagname)   //获取phpcms的tag数据
{
global $TAG;
if(!isset($TAG)) $TAG = cache_read('tag.inc.php', TPL_ROOT.TPL_NAME.'/');
return isset($TAG[$tagname]) ? '<?php echo '.$TAG[$tagname].';?>' : '{tag_'.$tagname.'}';
}

function addquote($var)          //变量数据加双相号
{
return str_replace("\\\"", "\"", preg_replace("/\[([a-zA-Z0-9_\-\.\x7f-\xff]+)\]/s", "['\\1']", $var));
}

function get_parse($str) //正则匹配
{
preg_match_all("/([a-z]+)\=\"([^\"]+)\"/i", stripslashes($str), $matches, PREG_SET_ORDER);
foreach($matches as $v)
{
$r[$v[1]] = $v[2];
}
extract($r);
if(!isset($dbsource)) $dbsource = '';
if(!isset($dbname)) $dbname = '';
if(!isset($sql)) $sql = '';
if(!isset($rows)) $rows = 0;
if(!isset($return) || !preg_match("/^\w+$/i", $return)) $return = 'r';
if(isset($page))
{
$str = "<?php \$ARRAY = get(\"$sql\", $rows, $page, \"$dbname\", \"$dbsource\");\$DATA=\$ARRAY['data'];\$total=\$ARRAY['total'];\$count=\$ARRAY['count'];\$pages=\$ARRAY['pages'];unset(\$ARRAY);foreach(\$DATA AS \$n=>\${$return}){\$n++;?>";
}
else
{
$str = substr($str, -1) == '/' ? "<?php \${$return} = get(\"$sql\", -1, 0, \"$dbname\", \"$dbsource\");?>" : "<?php \$DATA = get(\"$sql\", $rows, 0, \"$dbname\", \"$dbsource\");foreach(\$DATA AS \$n => \${$return}) { \$n++;?>";
}
return $str;
}
?>

以上这些就是phpcms的默认文件cache模版的生成原理

现看一下首页的调用

<?php
.........

include template('phpcms', 'index');   //加载进来,就是我们看到的首页了,也就是加载了 /dada/cache_templete/phpcms_index.tpl.php
.......
?>