How CodeIgniter uses the view template engine of phpcms

本文和大家分享了CodeIgniter如何使用phpcms的view模板解析功能，希望对大家有所帮助。

CodeIgniter很适合小站点应用开发，但是它自带的view功能可能会给不懂PHP的前端人员带来麻烦。 相比之下phpcms的view模板解析就强大多了，所以这里就把PHPCMS的模板解析功能剥离出来，加到PHPCMS上。
首先在CodeIgniter libraries中 增加 template_cache.php

代码如下:

<?php if (!defined(&#39;BASEPATH&#39;)) exit(&#39;No direct script access allowed&#39;); 
/**
 *  模板解析缓存
 */
final class template_cache {

    public $cache_path;
    public function __construct()
    {
        //$CI =& get_instance();
        $this->cache_path = APPPATH.&#39;views&#39;;
    }

    /**
     * 编译模板
     *
     * @param $module    模块名称
     * @param $template    模板文件名
     * @param $istag    是否为标签模板
     * @return unknown
     */

    public function template_compile($module, $template, $style = &#39;default&#39;) {

        $tplfile= APPPATH.&#39;views&#39;.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.&#39;.php&#39;;

        if (! file_exists ( $tplfile )) {
            show_error($tplfile ,  500 ,  &#39;Template does not exist(1)&#39;);
        }

        $content = @file_get_contents ( $tplfile );
        $filepath = $this->cache_path.DIRECTORY_SEPARATOR.&#39;caches_template&#39;.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR;

        
        if(!is_dir($filepath)) {
            mkdir($filepath, 0777, true);
        }
        $compiledtplfile = $filepath.$template.&#39;.php&#39;;
        $content = $this->template_parse($content);
        $strlen = file_put_contents ( $compiledtplfile, $content );
        chmod ( $compiledtplfile, 0777 );
        return $strlen;
    }

    /**
     * 更新模板缓存
     *
     * @param $tplfile    模板原文件路径
     * @param $compiledtplfile    编译完成后，写入文件名
     * @return $strlen 长度
     */
    public function template_refresh($tplfile, $compiledtplfile) {
        $str = @file_get_contents ($tplfile);
        $str = $this->template_parse ($str);
        $strlen = file_put_contents ($compiledtplfile, $str );
        chmod ($compiledtplfile, 0777);
        return $strlen;
    }
   
    /**
     * 解析模板
     *
     * @param $str    模板内容
     * @return ture
     */
    public function template_parse($str) {
        $str = preg_replace ( "/\{template\s+(.+)\}/", "<?php include template(\\1); ?>", $str );
        $str = preg_replace ( "/\{include\s+(.+)\}/", "<?php include \\1; ?>", $str );
        $str = preg_replace ( "/\{view\s+(.+)\}/", "<?php \$this->load->view(\\1); ?>", $str );
        $str = preg_replace ( "/\{php\s+(.+)\}/", "<?php \\1?>", $str );
        //alex fix
        $str = preg_replace ( "/\{{if\s+(.+?)\}}/", "``if \\1``", $str );
        $str = preg_replace ( "/\{{else\}}/", "``else``", $str );
        $str = preg_replace ( "/\{{\/if\}}/", "``/if``", $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 );

        //for 循环
        $str = preg_replace("/\{for\s+(.+?)\}/","<?php for(\\1) { ?>",$str);
        $str = preg_replace("/\{\/for\}/","<?php } ?>",$str);
        //++ --
        $str = preg_replace("/\{\+\+(.+?)\}/","<?php ++\\1; ?>",$str);
        $str = preg_replace("/\{\-\-(.+?)\}/","<?php ++\\1; ?>",$str);
        $str = preg_replace("/\{(.+?)\+\+\}/","<?php \\1++; ?>",$str);
        $str = preg_replace("/\{(.+?)\-\-\}/","<?php \\1--; ?>",$str);
        //alex fix
        $str = preg_replace ( "/\``if\s+(.+?)\``/", "{{if \\1}}", $str );
        $str = preg_replace ( "/\``else``/", "{{else}}", $str );
        $str = preg_replace ( "/\``\/if\``/", "{{/if}}", $str );

        $str = preg_replace ( "/\{loop\s+(\S+)\s+(\S+)\}/", "<?php \$n=1;if(is_array(\\1)) foreach(\\1 AS \\2) { ?>", $str );
        $str = preg_replace ( "/\{loop\s+(\S+)\s+(\S+)\s+(\S+)\}/", "<?php \$n=1; if(is_array(\\1)) foreach(\\1 AS \\2 => \\3) { ?>", $str );
        $str = preg_replace ( "/\{\/loop\}/", "<?php \$n++;}unset(\$n); ?>", $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_\[\]\&#39;\"\$\x7f-\xff]+)\}/es", "\$this->addquote(&#39;<?php echo \\1;?>&#39;)",$str);
        $str = preg_replace ( "/\{([A-Z_\x7f-\xff][A-Z0-9_\x7f-\xff]*)\}/s", "<?php echo \\1;?>", $str );
        $str = preg_replace("/\{pc:(\w+)\s+([^}]+)\}/ie", "self::pc_tag(&#39;$1&#39;,&#39;$2&#39;, &#39;$0&#39;)", $str);
        $str = preg_replace("/\{\/pc\}/ie", "self::end_pc_tag()", $str);
        $str = "<?php defined(&#39;BASEPATH&#39;) or exit(&#39;No direct script access allowed.&#39;); ?>" . $str;
        return $str;
    }
    /**
     * 转义 // 为 /
     *
     * @param $var    转义的字符
     * @return 转义后的字符
     */
    public function addquote($var) {
        return str_replace ( "\\\"", "\"", preg_replace ( "/\[([a-zA-Z0-9_\-\.\x7f-\xff]+)\]/s", "[&#39;\\1&#39;]", $var ) );
    }

    /**
     * 解析PC标签
     * @param string $op 操作方式
     * @param string $data 参数
     * @param string $html 匹配到的所有的HTML代码
     */
    public static function pc_tag($op, $data, $html) {
        preg_match_all("/([a-z]+)\=[\"]?([^\"]+)[\"]?/i", stripslashes($data), $matches, PREG_SET_ORDER);
        $arr = array(&#39;action&#39;,&#39;num&#39;,&#39;cache&#39;,&#39;page&#39;, &#39;pagesize&#39;, &#39;urlrule&#39;, &#39;return&#39;, &#39;start&#39;,&#39;setpages&#39;);
        $tools = array(&#39;json&#39;, &#39;xml&#39;, &#39;block&#39;, &#39;get&#39;);
        $datas = array();
        $tag_id = md5(stripslashes($html));
        //可视化条件
        $str_datas = &#39;op=&#39;.$op.&#39;&tag_md5=&#39;.$tag_id;
        foreach ($matches as $v) {
            $str_datas .= $str_datas ? "&$v[1]=".($op == &#39;block&#39; && strpos($v[2], &#39;$&#39;) === 0 ? $v[2] : urlencode($v[2])) : "$v[1]=".(strpos($v[2], &#39;$&#39;) === 0 ? $v[2] : urlencode($v[2]));
            if(in_array($v[1], $arr)) {
                $$v[1] = $v[2];
                continue;
            }
            $datas[$v[1]] = $v[2];
        }
        $str = &#39;&#39;;
        $setpages = isset($setpages) && intval($setpages) ? intval($setpages) : 10;
        $num = isset($num) && intval($num) ? intval($num) : 20;
        $cache = isset($cache) && intval($cache) ? intval($cache) : 0;
        $return = isset($return) && trim($return) ? trim($return) : &#39;data&#39;;
        if (!isset($urlrule)) $urlrule = &#39;&#39;;
        if (!empty($cache) && !isset($page)) {
            $str .= &#39;$tag_cache_name = md5(implode(\&#39;&\&#39;,&#39;.self::arr_to_html($datas).&#39;).\&#39;&#39;.$tag_id.&#39;\&#39;);if(!$&#39;.$return.&#39; = tpl_cache($tag_cache_name,&#39;.$cache.&#39;)){&#39;;
        }
        if (in_array($op,$tools)) {
            switch ($op) {
                case &#39;json&#39;:
                        if (isset($datas[&#39;url&#39;]) && !empty($datas[&#39;url&#39;])) {
                            $str .= &#39;$json = @file_get_contents(\&#39;&#39;.$datas[&#39;url&#39;].&#39;\&#39;);&#39;;
                            $str .= &#39;$&#39;.$return.&#39; = json_decode($json, true);&#39;;
                        }
                    break;

                case &#39;block&#39;:
                    $str .= &#39;$block_tag = pc_base::load_app_class(\&#39;block_tag\&#39;, \&#39;block\&#39;);&#39;;
                    $str .= &#39;echo $block_tag->pc_tag(&#39;.self::arr_to_html($datas).&#39;);&#39;;
                    break;
            }
        } else {
            if (!isset($action) || empty($action)) return false;
            if ( file_exists(APPPATH.&#39;libraries&#39;.DIRECTORY_SEPARATOR.$op.&#39;_tag.php&#39;)) {
                $str .= &#39;if(!isset($CI))$CI =& get_instance();$CI->load->library("&#39;.$op.&#39;_tag");if (method_exists($CI->&#39;.$op.&#39;_tag, \&#39;&#39;.$action.&#39;\&#39;)) {&#39;;    
                if (isset($start) && intval($start)) {
                    $datas[&#39;limit&#39;] = intval($start).&#39;,&#39;.$num;
                } else {
                    $datas[&#39;limit&#39;] = $num;
                }
                if (isset($page)) {
                    $str .= &#39;$pagesize = &#39;.$num.&#39;;&#39;;
                    $str .= &#39;$page = intval(&#39;.$page.&#39;) ? intval(&#39;.$page.&#39;) : 1;if($page<=0){$page=1;}&#39;;
                    $str .= &#39;$offset = ($page - 1) * $pagesize;$urlrule="&#39;.$urlrule.&#39;";&#39;;
                    $datas[&#39;limit&#39;] = &#39;$offset.",".$pagesize&#39;;
                    $datas[&#39;action&#39;] = $action;
                    $str .= &#39;$&#39;.$op.&#39;_total = $CI->&#39;.$op.&#39;_tag->count(&#39;.self::arr_to_html($datas).&#39;);&#39;;

                    $str .= &#39;if($&#39;.$op.&#39;_total>$pagesize){ $pages = pages($&#39;.$op.&#39;_total, $page, $pagesize, $urlrule); } else { $pages="" ;}&#39;;
                }
                $str .= &#39;$&#39;.$return.&#39; = $CI->&#39;.$op.&#39;_tag->&#39;.$action.&#39;(&#39;.self::arr_to_html($datas).&#39;);&#39;;
                $str .= &#39;}&#39;;
            } 
        }
        if (!empty($cache) && !isset($page)) {
            $str .= &#39;if(!empty($&#39;.$return.&#39;)){setcache($tag_cache_name, $&#39;.$return.&#39;, \&#39;tpl_data\&#39;);}&#39;;
            $str .= &#39;}&#39;;
        }
        return "<"."?php ".$str."?".">";
    }

    /**
     * PC标签结束
     */
    static private function end_pc_tag() {
        return &#39;<?php if(defined(\&#39;IN_ADMIN\&#39;) && !defined(\&#39;HTML\&#39;)) {if(isset($data))unset($data);echo \&#39;</p>\&#39;;}?>&#39;;
    }

    /**
     * 转换数据为HTML代码
     * @param array $data 数组
     */
    private static function arr_to_html($data) {
        if (is_array($data)) {
            $str = &#39;array(&#39;;
            foreach ($data as $key=>$val) {
                if (is_array($val)) {
                    $str .= "&#39;$key&#39;=>".self::arr_to_html($val).",";
                } else {
                    if (strpos($val, &#39;$&#39;)===0) {
                        $str .= "&#39;$key&#39;=>$val,";
                    } else {
                        $str .= "&#39;$key&#39;=>&#39;".self::new_addslashes($val)."&#39;,";
                    }
                }
            }
            return $str.&#39;)&#39;;
        }
        return false;
    }

    /**
     * 返回经addslashes处理过的字符串或数组
     * @param $string 需要处理的字符串或数组
     * @return mixed
     */
    function new_addslashes($string){
        if(!is_array($string)) return addslashes($string);
        foreach($string as $key => $val) $string[$key] = new_addslashes($val);
        return $string;
    }
}

然后在global_helper中增加一个 template函数

代码如下：

if ( ! function_exists('template'))
{
    /**
     * 模板调用
     * 
     * @param $module
     * @param $template
     * @param $istag
     * @return unknown_type
     */
    function template($module = 'expatree', $template = 'index', $style = 'expatree',$return_full_path=true) {
        global $CI;
        if(!isset($CI))$CI =& get_instance();
        if(!$style) $style = 'default';
        $CI->load->library('template_cache','template_cache');
        $template_cache = $CI->template_cache;
        //编译模板生成地址
        $compiledtplfile = $template_cache->cache_path.DIRECTORY_SEPARATOR.'caches_template'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.EXT;
        //视图文件
        $tplfile= APPPATH.'views'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.EXT;
        if(file_exists($tplfile)) {
            if(!file_exists($compiledtplfile) || (@filemtime($tplfile) > @filemtime($compiledtplfile))) {    
                $template_cache->template_compile($module, $template, $style);
            }
        } else {
            //如果没有就调取默认风格模板
            $compiledtplfile = $template_cache->cache_path.DIRECTORY_SEPARATOR.'caches_template'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.EXT;
            if(!file_exists($compiledtplfile) || (file_exists($tplfile) && filemtime($tplfile) > filemtime($compiledtplfile))) {
                $template_cache->template_compile($module, $template, 'default');
            } elseif (!file_exists($tplfile)) {
                show_error($tplfile ,  500 ,  'Template does not exist(0)');
            }
        }
        if($return_full_path)
            return $compiledtplfile;
        else
            return 'caches_template'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template;
    }
}

然后在MY_Controller.php，增加一个方法

代码如下:

/**
    * 自动模板调用
    * 
    * @param $module
    * @param $template
    * @param $istag
    * @return unknown_type
    */
   protected function view($view_file,$page_data=false,$cache=false)
   {
       $view_file=$this->template($this->page_data['controller_name'].$this->page_data['module_name'],$view_file);

       $this->load->view($view_file,$page_data);
   }

这样基本上完成了，可以直接phpcms模板语法了。

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