CodeIgniter使用phpcms模板引擎
本文介绍CodeIgniter如何使用phpcms的view模板解析功能
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
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
* 模板解析缓存
*/
final class template_cache {
public $cache_path;
public function __construct()
{
//$CI =& get_instance();
$this->cache_path = APPPATH.'views';
}
/**
* 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 = 'default') {
$tplfile= APPPATH.'views'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.php';
if (! file_exists ( $tplfile )) {
show_error($tplfile , 500 , 'Template does not exist(1)');
}
$content = @file_get_contents ( $tplfile );
$filepath = $this->cache_path.DIRECTORY_SEPARATOR.'caches_template'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR;
if(!is_dir($filepath)) {
mkdir($filepath, 0777, true);
}
$compiledtplfile = $filepath.$template.'.php';
$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_\[\]\'\"\$\x7f-\xff]+)\}/es", "\$this->addquote('<?php echo \\1;?>')",$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('$1','$2', '$0')", $str);
$str = preg_replace("/\{\/pc\}/ie", "self::end_pc_tag()", $str);
$str = "<?php defined('BASEPATH') or exit('No direct script access allowed.'); ?>" . $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", "['\\1']", $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('action','num','cache','page', 'pagesize', 'urlrule', 'return', 'start','setpages');
$tools = array('json', 'xml', 'block', 'get');
$datas = array();
$tag_id = md5(stripslashes($html));
//可视化条件
$str_datas = 'op='.$op.'&tag_md5='.$tag_id;
foreach ($matches as $v) {
$str_datas .= $str_datas ? "&$v[1]=".($op == 'block' && strpos($v[2], '$') === 0 ? $v[2] : urlencode($v[2])) : "$v[1]=".(strpos($v[2], '$') === 0 ? $v[2] : urlencode($v[2]));
if(in_array($v[1], $arr)) {
$$v[1] = $v[2];
continue;
}
$datas[$v[1]] = $v[2];
}
$str = '';
$setpages = isset($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) : 'data';
if (!isset($urlrule)) $urlrule = '';
if (!empty($cache) && !isset($page)) {
$str .= '$tag_cache_name = md5(implode(\'&\','.self::arr_to_html($datas).').\''.$tag_id.'\');if(!$'.$return.' = tpl_cache($tag_cache_name,'.$cache.')){';
}
if (in_array($op,$tools)) {
switch ($op) {
case 'json':
if (isset($datas['url']) && !empty($datas['url'])) {
$str .= '$json = @file_get_contents(\''.$datas['url'].'\');';
$str .= '$'.$return.' = json_decode($json, true);';
}
break;
case 'block':
$str .= '$block_tag = pc_base::load_app_class(\'block_tag\', \'block\');';
$str .= 'echo $block_tag->pc_tag('.self::arr_to_html($datas).');';
break;
}
} else {
if (!isset($action) || empty($action)) return false;
if ( file_exists(APPPATH.'libraries'.DIRECTORY_SEPARATOR.$op.'_tag.php')) {
$str .= 'if(!isset($CI))$CI =& get_instance();$CI->load->library("'.$op.'_tag");if (method_exists($CI->'.$op.'_tag, \''.$action.'\')) {';
if (isset($start) && intval($start)) {
$datas['limit'] = intval($start).','.$num;
} else {
$datas['limit'] = $num;
}
if (isset($page)) {
$str .= '$pagesize = '.$num.';';
$str .= '$page = intval('.$page.') ? intval('.$page.') : 1;if($page<=0){$page=1;}';
$str .= '$offset = ($page - 1) * $pagesize;$urlrule="'.$urlrule.'";';
$datas['limit'] = '$offset.",".$pagesize';
$datas['action'] = $action;
$str .= '$'.$op.'_total = $CI->'.$op.'_tag->count('.self::arr_to_html($datas).');';
$str .= 'if($'.$op.'_total>$pagesize){ $pages = pages($'.$op.'_total, $page, $pagesize, $urlrule); } else { $pages="" ;}';
}
$str .= '$'.$return.' = $CI->'.$op.'_tag->'.$action.'('.self::arr_to_html($datas).');';
$str .= '}';
}
}
if (!empty($cache) && !isset($page)) {
$str .= 'if(!empty($'.$return.')){setcache($tag_cache_name, $'.$return.', \'tpl_data\');}';
$str .= '}';
}
return "<"."?php ".$str."?".">";
}
/**
* PC标签结束
*/
static private function end_pc_tag() {
return '<?php if(defined(\'IN_ADMIN\') && !defined(\'HTML\')) {if(isset($data))unset($data);echo \'</div>\';}?>';
}
/**
* 转换数据为HTML代码
* @param array $data 数组
*/
private static function arr_to_html($data) {
if (is_array($data)) {
$str = 'array(';
foreach ($data as $key=>$val) {
if (is_array($val)) {
$str .= "'$key'=>".self::arr_to_html($val).",";
} else {
if (strpos($val, '$')===0) {
$str .= "'$key'=>$val,";
} else {
$str .= "'$key'=>'".self::new_addslashes($val)."',";
}
}
}
return $str.')';
}
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
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
/**
* 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。