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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace think;
use think\exception\TemplateNotFoundException;
/**
* ThinkPHP分离出来的模板引擎
* 支持XML标签和普通标签的模板解析
* 编译型模板引擎 支持动态缓存
*/
class Template
{
// 模板变量
protected $data = [];
// 引擎配置
protected $config = [
'view_path' => '', // 模板路径
'view_base' => '',
'view_suffix' => 'html', // 默认模板文件后缀
'view_depr' => DS,
'cache_suffix' => 'php', // 默认模板缓存后缀
'tpl_deny_func_list' => 'echo,exit', // 模板引擎禁用函数
'tpl_deny_php' => false, // 默认模板引擎是否禁用PHP原生代码
'tpl_begin' => '{', // 模板引擎普通标签开始标记
'tpl_end' => '}', // 模板引擎普通标签结束标记
'strip_space' => false, // 是否去除模板文件里面的html空格与换行
'tpl_cache' => true, // 是否开启模板编译缓存,设为false则每次都会重新编译
'compile_type' => 'file', // 模板编译类型
'cache_prefix' => '', // 模板缓存前缀标识，可以动态改变
'cache_time' => 0, // 模板缓存有效期 0 为永久，(以数字为值，单位:秒)
'layout_on' => false, // 布局模板开关
'layout_name' => 'layout', // 布局模板入口文件
'layout_item' => '{__CONTENT__}', // 布局模板的内容替换标识
'taglib_begin' => '{', // 标签库标签开始标记
'taglib_end' => '}', // 标签库标签结束标记
'taglib_load' => true, // 是否使用内置标签库之外的其它标签库，默认自动检测
'taglib_build_in' => 'cx', // 内置标签库名称(标签使用不必指定标签库名称),以逗号分隔 注意解析顺序
'taglib_pre_load' => '', // 需要额外加载的标签库(须指定标签库名称)，多个以逗号分隔
'display_cache' => false, // 模板渲染缓存
'cache_id' => '', // 模板缓存ID
'tpl_replace_string' => [],
'tpl_var_identify' => 'array', // .语法变量识别，array|object|'', 为空时自动识别
];
private $literal = [];
private $includeFile = []; // 记录所有模板包含的文件路径及更新时间
protected $storage;
/**
* 构造函数
* @access public
*/
public function __construct(array $config = [])
{
$this->config['cache_path'] = TEMP_PATH;
$this->config = array_merge($this->config, $config);
$this->config['taglib_begin'] = $this->stripPreg($this->config['taglib_begin']);
$this->config['taglib_end'] = $this->stripPreg($this->config['taglib_end']);
$this->config['tpl_begin'] = $this->stripPreg($this->config['tpl_begin']);
$this->config['tpl_end'] = $this->stripPreg($this->config['tpl_end']);
// 初始化模板编译存储器
$type = $this->config['compile_type'] ? $this->config['compile_type'] : 'File';
$class = false !== strpos($type, '\\') ? $type : '\\think\\template\\driver\\' . ucwords($type);
$this->storage = new $class();
}
/**
* 字符串替换 避免正则混淆
* @access private
* @param string $str
* @return string
*/
private function stripPreg($str)
{
return str_replace(
['{', '}', '(', ')', '|', '[', ']', '-', '+', '*', '.', '^', '?'],
['\{', '\}', '\(', '\)', '\|', '\[', '\]', '\-', '\+', '\*', '\.', '\^', '\?'],
$str);
}
/**
* 模板变量赋值
* @access public
* @param mixed $name
* @param mixed $value
* @return void
*/
public function assign($name, $value = '')
{
if (is_array($name)) {
$this->data = array_merge($this->data, $name);
} else {
$this->data[$name] = $value;
}
}
/**
* 模板引擎参数赋值
* @access public
* @param mixed $name
* @param mixed $value
*/
public function __set($name, $value)
{
$this->config[$name] = $value;
}
/**
* 模板引擎配置项
* @access public
* @param array|string $config
* @return void|array
*/
public function config($config)
{
if (is_array($config)) {
$this->config = array_merge($this->config, $config);
} elseif (isset($this->config[$config])) {
return $this->config[$config];
} else {
return;
}
}
/**
* 模板变量获取
* @access public
* @param string $name 变量名
* @return mixed
*/
public function get($name = '')
{
if ('' == $name) {
return $this->data;
} else {
$data = $this->data;
foreach (explode('.', $name) as $key => $val) {
if (isset($data[$val])) {
$data = $data[$val];
} else {
$data = null;
break;
}
}
return $data;
}
}
/**
* 渲染模板文件
* @access public
* @param string $template 模板文件
* @param array $vars 模板变量
* @param array $config 模板参数
* @return void
*/
public function fetch($template, $vars = [], $config = [])
{
if ($vars) {
$this->data = $vars;
}
if ($config) {
$this->config($config);
}
if (!empty($this->config['cache_id']) && $this->config['display_cache']) {
// 读取渲染缓存
$cacheContent = Cache::get($this->config['cache_id']);
if (false !== $cacheContent) {
echo $cacheContent;
return;
}
}
$template = $this->parseTemplateFile($template);
if ($template) {
$cacheFile = $this->config['cache_path'] . $this->config['cache_prefix'] . md5($template) . '.' . ltrim($this->config['cache_suffix'], '.');
if (!$this->checkCache($cacheFile)) {
// 缓存无效 重新模板编译
$content = file_get_contents($template);
$this->compiler($content, $cacheFile);
}
// 页面缓存
ob_start();
ob_implicit_flush(0);
// 读取编译存储
$this->storage->read($cacheFile, $this->data);
// 获取并清空缓存
$content = ob_get_clean();
if (!empty($this->config['cache_id']) && $this->config['display_cache']) {
// 缓存页面输出
Cache::set($this->config['cache_id'], $content, $this->config['cache_time']);
}
echo $content;
}
}
/**
* 渲染模板内容
* @access public
* @param string $content 模板内容
* @param array $vars 模板变量
* @param array $config 模板参数
* @return void
*/
public function display($content, $vars = [], $config = [])
{
if ($vars) {
$this->data = $vars;
}
if ($config) {
$this->config($config);
}
$cacheFile = $this->config['cache_path'] . $this->config['cache_prefix'] . md5($content) . '.' . ltrim($this->config['cache_suffix'], '.');
if (!$this->checkCache($cacheFile)) {
// 缓存无效 模板编译
$this->compiler($content, $cacheFile);
}
// 读取编译存储
$this->storage->read($cacheFile, $this->data);
}
/**
* 设置布局
* @access public
* @param mixed $name 布局模板名称 false 则关闭布局
* @param string $replace 布局模板内容替换标识
* @return object
*/
public function layout($name, $replace = '')
{
if (false === $name) {
// 关闭布局
$this->config['layout_on'] = false;
} else {
// 开启布局
$this->config['layout_on'] = true;
// 名称必须为字符串
if (is_string($name)) {
$this->config['layout_name'] = $name;
}
if (!empty($replace)) {
$this->config['layout_item'] = $replace;
}
}
return $this;
}
/**
* 检查编译缓存是否有效
* 如果无效则需要重新编译
* @access private
* @param string $cacheFile 缓存文件名
* @return boolean
*/
private function checkCache($cacheFile)
{
// 未开启缓存功能
if (!$this->config['tpl_cache']) {
return false;
}
// 缓存文件不存在
if (!is_file($cacheFile)) {
return false;
}
// 读取缓存文件失败
if (!$handle = @fopen($cacheFile, "r")) {
return false;
}
// 读取第一行
preg_match('/\/\*(.+?)\*\//', fgets($handle), $matches);
if (!isset($matches[1])) {
return false;
}
$includeFile = unserialize($matches[1]);
if (!is_array($includeFile)) {
return false;
}
// 检查模板文件是否有更新
foreach ($includeFile as $path => $time) {
if (is_file($path) && filemtime($path) > $time) {
// 模板文件如果有更新则缓存需要更新
return false;
}
}
// 检查编译存储是否有效
return $this->storage->check($cacheFile, $this->config['cache_time']);
}
/**
* 检查编译缓存是否存在
* @access public
* @param string $cacheId 缓存的id
* @return boolean
*/
public function isCache($cacheId)
{
if ($cacheId && $this->config['display_cache']) {
// 缓存页面输出
return Cache::has($cacheId);
}
return false;
}
/**
* 编译模板文件内容
* @access private
* @param string $content 模板内容
* @param string $cacheFile 缓存文件名
* @return void
*/
private function compiler(&$content, $cacheFile)
{
// 判断是否启用布局
if ($this->config['layout_on']) {
if (false !== strpos($content, '{__NOLAYOUT__}')) {
// 可以单独定义不使用布局
$content = str_replace('{__NOLAYOUT__}', '', $content);
} else {
// 读取布局模板
$layoutFile = $this->parseTemplateFile($this->config['layout_name']);
if ($layoutFile) {
// 替换布局的主体内容
$content = str_replace($this->config['layout_item'], $content, file_get_contents($layoutFile));
}
}
} else {
$content = str_replace('{__NOLAYOUT__}', '', $content);
}
// 模板解析
$this->parse($content);
if ($this->config['strip_space']) {
/* 去除html空格与换行 */
$find = ['~>\s+<~', '~>(\s+\n|\r)~'];
$replace = ['><', '>'];
$content = preg_replace($find, $replace, $content);
}
// 优化生成的php代码
$content = preg_replace('/\?>\s*<\?php\s(?!echo\b)/s', '', $content);
// 模板过滤输出
$replace = $this->config['tpl_replace_string'];
$content = str_replace(array_keys($replace), array_values($replace), $content);
// 添加安全代码及模板引用记录
$content = '<?php if (!defined(\'THINK_PATH\')) exit(); /*' . serialize($this->includeFile) . '*/ ?>' . "\n" . $content;
// 编译存储
$this->storage->write($cacheFile, $content);
$this->includeFile = [];
return;
}
/**
* 模板解析入口
* 支持普通标签和TagLib解析 支持自定义标签库
* @access public
* @param string $content 要解析的模板内容
* @return void
*/
public function parse(&$content)
{
// 内容为空不解析
if (empty($content)) {
return;
}
// 替换literal标签内容
$this->parseLiteral($content);
// 解析继承
$this->parseExtend($content);
// 解析布局
$this->parseLayout($content);
// 检查include语法
$this->parseInclude($content);
// 替换包含文件中literal标签内容
$this->parseLiteral($content);
// 检查PHP语法
$this->parsePhp($content);
// 获取需要引入的标签库列表
// 标签库只需要定义一次，允许引入多个一次
// 一般放在文件的最前面
// 格式：<taglib name="html,mytag..." />
// 当TAGLIB_LOAD配置为true时才会进行检测
if ($this->config['taglib_load']) {
$tagLibs = $this->getIncludeTagLib($content);
if (!empty($tagLibs)) {
// 对导入的TagLib进行解析
foreach ($tagLibs as $tagLibName) {
$this->parseTagLib($tagLibName, $content);
}
}
}
// 预先加载的标签库 无需在每个模板中使用taglib标签加载 但必须使用标签库XML前缀
if ($this->config['taglib_pre_load']) {
$tagLibs = explode(',', $this->config['taglib_pre_load']);
foreach ($tagLibs as $tag) {
$this->parseTagLib($tag, $content);
}
}
// 内置标签库 无需使用taglib标签导入就可以使用 并且不需使用标签库XML前缀
$tagLibs = explode(',', $this->config['taglib_build_in']);
foreach ($tagLibs as $tag) {
$this->parseTagLib($tag, $content, true);
}
// 解析普通模板标签 {$tagName}
$this->parseTag($content);
// 还原被替换的Literal标签
$this->parseLiteral($content, true);
return;
}
/**
* 检查PHP语法
* @access private
* @param string $content 要解析的模板内容
* @return void
* @throws \think\Exception
*/
private function parsePhp(&$content)
{
// 短标签的情况要将<?标签用echo方式输出 否则无法正常输出xml标识
$content = preg_replace('/(<\?(?!php|=|$))/i', '<?php echo \'\\1\'; ?>' . "\n", $content);
// PHP语法检查
if ($this->config['tpl_deny_php'] && false !== strpos($content, '<?php')) {
throw new Exception('not allow php tag', 11600);
}
return;
}
/**
* 解析模板中的布局标签
* @access private
* @param string $content 要解析的模板内容
* @return void
*/
private function parseLayout(&$content)
{
// 读取模板中的布局标签
if (preg_match($this->getRegex('layout'), $content, $matches)) {
// 替换Layout标签
$content = str_replace($matches[0], '', $content);
// 解析Layout标签
$array = $this->parseAttr($matches[0]);
if (!$this->config['layout_on'] || $this->config['layout_name'] != $array['name']) {
// 读取布局模板
$layoutFile = $this->parseTemplateFile($array['name']);
if ($layoutFile) {
$replace = isset($array['replace']) ? $array['replace'] : $this->config['layout_item'];
// 替换布局的主体内容
$content = str_replace($replace, $content, file_get_contents($layoutFile));
}
}
} else {
$content = str_replace('{__NOLAYOUT__}', '', $content);
}
return;
}
/**
* 解析模板中的include标签
* @access private
* @param string $content 要解析的模板内容
* @return void
*/
private function parseInclude(&$content)
{
$regex = $this->getRegex('include');
$func = function ($template) use (&$func, &$regex, &$content) {
if (preg_match_all($regex, $template, $matches, PREG_SET_ORDER)) {
foreach ($matches as $match) {
$array = $this->parseAttr($match[0]);
$file = $array['file'];
unset($array['file']);
// 分析模板文件名并读取内容
$parseStr = $this->parseTemplateName($file);
foreach ($array as $k => $v) {
// 以$开头字符串转换成模板变量
if (0 === strpos($v, '$')) {
$v = $this->get(substr($v, 1));
}
$parseStr = str_replace('[' . $k . ']', $v, $parseStr);
}
$content = str_replace($match[0], $parseStr, $content);
// 再次对包含文件进行模板分析
$func($parseStr);
}
unset($matches);
}
};
// 替换模板中的include标签
$func($content);
return;
}
/**
* 解析模板中的extend标签
* @access private
* @param string $content 要解析的模板内容
* @return void
*/
private function parseExtend(&$content)
{
$regex = $this->getRegex('extend');
$array = $blocks = $baseBlocks = [];
$extend = '';
$func = function ($template) use (&$func, &$regex, &$array, &$extend, &$blocks, &$baseBlocks) {
if (preg_match($regex, $template, $matches)) {
if (!isset($array[$matches['name']])) {
$array[$matches['name']] = 1;
// 读取继承模板
$extend = $this->parseTemplateName($matches['name']);
// 递归检查继承
$func($extend);
// 取得block标签内容
$blocks = array_merge($blocks, $this->parseBlock($template));
return;
}
} else {
// 取得顶层模板block标签内容
$baseBlocks = $this->parseBlock($template, true);
if (empty($extend)) {
// 无extend标签但有block标签的情况
$extend = $template;
}
}
};
$func($content);
if (!empty($extend)) {
if ($baseBlocks) {
$children = [];
foreach ($baseBlocks as $name => $val) {
$replace = $val['content'];
if (!empty($children[$name])) {
// 如果包含有子block标签
foreach ($children[$name] as $key) {
$replace = str_replace($baseBlocks[$key]['begin'] . $baseBlocks[$key]['content'] . $baseBlocks[$key]['end'], $blocks[$key]['content'], $replace);
}
}
if (isset($blocks[$name])) {
// 带有{__block__}表示与所继承模板的相应标签合并，而不是覆盖
$replace = str_replace(['{__BLOCK__}', '{__block__}'], $replace, $blocks[$name]['content']);
if (!empty($val['parent'])) {
// 如果不是最顶层的block标签
$parent = $val['parent'];
if (isset($blocks[$parent])) {
$blocks[$parent]['content'] = str_replace($blocks[$name]['begin'] . $blocks[$name]['content'] . $blocks[$name]['end'], $replace, $blocks[$parent]['content']);
}
$blocks[$name]['content'] = $replace;
$children[$parent][] = $name;
continue;
}
} elseif (!empty($val['parent'])) {
// 如果子标签没有被继承则用原值
$children[$val['parent']][] = $name;
$blocks[$name] = $val;
}
if (!$val['parent']) {
// 替换模板中的顶级block标签
$extend = str_replace($val['begin'] . $val['content'] . $val['end'], $replace, $extend);
}
}
}
$content = $extend;
unset($blocks, $baseBlocks);
}
return;
}
/**
* 替换页面中的literal标签
* @access private
* @param string $content 模板内容
* @param boolean $restore 是否为还原
* @return void
*/
private function parseLiteral(&$content, $restore = false)
{
$regex = $this->getRegex($restore ? 'restoreliteral' : 'literal');
if (preg_match_all($regex, $content, $matches, PREG_SET_ORDER)) {
if (!$restore) {
$count = count($this->literal);
// 替换literal标签
foreach ($matches as $match) {
$this->literal[] = substr($match[0], strlen($match[1]), -strlen($match[2]));
$content = str_replace($match[0], "<!--###literal{$count}###-->", $content);
$count++;
}
} else {
// 还原literal标签
foreach ($matches as $match) {
$content = str_replace($match[0], $this->literal[$match[1]], $content);
}
// 清空literal记录
$this->literal = [];
}
unset($matches);
}
return;
}
/**
* 获取模板中的block标签
* @access private
* @param string $content 模板内容
* @param boolean $sort 是否排序
* @return array
*/
private function parseBlock(&$content, $sort = false)
{
$regex = $this->getRegex('block');
$result = [];
if (preg_match_all($regex, $content, $matches, PREG_SET_ORDER | PREG_OFFSET_CAPTURE)) {
$right = $keys = [];
foreach ($matches as $match) {
if (empty($match['name'][0])) {
if (count($right) > 0) {
$tag = array_pop($right);
$start = $tag['offset'] + strlen($tag['tag']);
$length = $match[0][1] - $start;
$result[$tag['name']] = [
'begin' => $tag['tag'],
'content' => substr($content, $start, $length),
'end' => $match[0][0],
'parent' => count($right) ? end($right)['name'] : '',
];
$keys[$tag['name']] = $match[0][1];
}
} else {
// 标签头压入栈
$right[] = [
'name' => $match[2][0],
'offset' => $match[0][1],
'tag' => $match[0][0],
];
}
}
unset($right, $matches);
if ($sort) {
// 按block标签结束符在模板中的位置排序
array_multisort($keys, $result);
}
}
return $result;
}
/**
* 搜索模板页面中包含的TagLib库
* 并返回列表
* @access private
* @param string $content 模板内容
* @return array|null
*/
private function getIncludeTagLib(&$content)
{
// 搜索是否有TagLib标签
if (preg_match($this->getRegex('taglib'), $content, $matches)) {
// 替换TagLib标签
$content = str_replace($matches[0], '', $content);
return explode(',', $matches['name']);
}
return;
}
/**
* TagLib库解析
* @access public
* @param string $tagLib 要解析的标签库
* @param string $content 要解析的模板内容
* @param boolean $hide 是否隐藏标签库前缀
* @return void
*/
public function parseTagLib($tagLib, &$content, $hide = false)
{
if (false !== strpos($tagLib, '\\')) {
// 支持指定标签库的命名空间
$className = $tagLib;
$tagLib = substr($tagLib, strrpos($tagLib, '\\') + 1);
} else {
$className = '\\think\\template\\taglib\\' . ucwords($tagLib);
}
$tLib = new $className($this);
$tLib->parseTag($content, $hide ? '' : $tagLib);
return;
}
/**
* 分析标签属性
* @access public
* @param string $str 属性字符串
* @param string $name 不为空时返回指定的属性名
* @return array
*/
public function parseAttr($str, $name = null)
{
$regex = '/\s+(?>(?P<name>[\w-]+)\s*)=(?>\s*)([\"\'])(?P<value>(?:(?!\\2).)*)\\2/is';
$array = [];
if (preg_match_all($regex, $str, $matches, PREG_SET_ORDER)) {
foreach ($matches as $match) {
$array[$match['name']] = $match['value'];
}
unset($matches);
}
if (!empty($name) && isset($array[$name])) {
return $array[$name];
} else {
return $array;
}
}
/**
* 模板标签解析
* 格式： {TagName:args [|content] }
* @access private
* @param string $content 要解析的模板内容
* @return void
*/
private function parseTag(&$content)
{
$regex = $this->getRegex('tag');
if (preg_match_all($regex, $content, $matches, PREG_SET_ORDER)) {
foreach ($matches as $match) {
$str = stripslashes($match[1]);
$flag = substr($str, 0, 1);
switch ($flag) {
case '$':
// 解析模板变量 格式 {$varName}
// 是否带有?号
if (false !== $pos = strpos($str, '?')) {
$array = preg_split('/([!=]={1,2}|(?<!-)[><]={0,1})/', substr($str, 0, $pos), 2, PREG_SPLIT_DELIM_CAPTURE);
$name = $array[0];
$this->parseVar($name);
$this->parseVarFunction($name);
$str = trim(substr($str, $pos + 1));
$this->parseVar($str);
$first = substr($str, 0, 1);
if (strpos($name, ')')) {
// $name为对象或是自动识别，或者含有函数
if (isset($array[1])) {
$this->parseVar($array[2]);
$name .= $array[1] . $array[2];
}
switch ($first) {
case '?':
$str = '<?php echo (' . $name . ') ? ' . $name . ' : ' . substr($str, 1) . '; ?>';
break;
case '=':
$str = '<?php if(' . $name . ') echo ' . substr($str, 1) . '; ?>';
break;
default:
$str = '<?php echo ' . $name . '?' . $str . '; ?>';
}
} else {
if (isset($array[1])) {
$this->parseVar($array[2]);
$_name = ' && ' . $name . $array[1] . $array[2];
} else {
$_name = '';
}
// $name为数组
switch ($first) {
case '?':
// {$varname??'xxx'} $varname有定义则输出$varname,否则输出xxx
$str = '<?php echo isset(' . $name . ')' . $_name . ' ? ' . $name . ' : ' . substr($str, 1) . '; ?>';
break;
case '=':
// {$varname?='xxx'} $varname为真时才输出xxx
$str = '<?php if(!empty(' . $name . ')' . $_name . ') echo ' . substr($str, 1) . '; ?>';
break;
case ':':
// {$varname?:'xxx'} $varname为真时输出$varname,否则输出xxx
$str = '<?php echo !empty(' . $name . ')' . $_name . '?' . $name . $str . '; ?>';
break;
default:
if (strpos($str, ':')) {
// {$varname ? 'a' : 'b'} $varname为真时输出a,否则输出b
$str = '<?php echo !empty(' . $name . ')' . $_name . '?' . $str . '; ?>';
} else {
$str = '<?php echo ' . $_name . '?' . $str . '; ?>';
}
}
}
} else {
$this->parseVar($str);
$this->parseVarFunction($str);
$str = '<?php echo ' . $str . '; ?>';
}
break;
case ':':
// 输出某个函数的结果
$str = substr($str, 1);
$this->parseVar($str);
$str = '<?php echo ' . $str . '; ?>';
break;
case '~':
// 执行某个函数
$str = substr($str, 1);
$this->parseVar($str);
$str = '<?php ' . $str . '; ?>';
break;
case '-':
case '+':
// 输出计算
$this->parseVar($str);
$str = '<?php echo ' . $str . '; ?>';
break;
case '/':
// 注释标签
$flag2 = substr($str, 1, 1);
if ('/' == $flag2 || ('*' == $flag2 && substr(rtrim($str), -2) == '*/')) {
$str = '';
}
break;
default:
// 未识别的标签直接返回
$str = $this->config['tpl_begin'] . $str . $this->config['tpl_end'];
break;
}
$content = str_replace($match[0], $str, $content);
}
unset($matches);
}
return;
}
/**
* 模板变量解析,支持使用函数
* 格式： {$varname|function1|function2=arg1,arg2}
* @access public
* @param string $varStr 变量数据
* @return void
*/
public function parseVar(&$varStr)
{
$varStr = trim($varStr);
if (preg_match_all('/\$[a-zA-Z_](?>\w*)(?:[:\.][0-9a-zA-Z_](?>\w*))+/', $varStr, $matches, PREG_OFFSET_CAPTURE)) {
static $_varParseList = [];
while ($matches[0]) {
$match = array_pop($matches[0]);
//如果已经解析过该变量字串，则直接返回变量值
if (isset($_varParseList[$match[0]])) {
$parseStr = $_varParseList[$match[0]];
} else {
if (strpos($match[0], '.')) {
$vars = explode('.', $match[0]);
$first = array_shift($vars);
if ('$Think' == $first) {
// 所有以Think.打头的以特殊变量对待 无需模板赋值就可以输出
$parseStr = $this->parseThinkVar($vars);
} elseif ('$Request' == $first) {
// 获取Request请求对象参数
$method = array_shift($vars);
if (!empty($vars)) {
$params = implode('.', $vars);
if ('true' != $params) {
$params = '\'' . $params . '\'';
}
} else {
$params = '';
}
$parseStr = '\think\Request::instance()->' . $method . '(' . $params . ')';
} else {
switch ($this->config['tpl_var_identify']) {
case 'array': // 识别为数组
$parseStr = $first . '[\'' . implode('\'][\'', $vars) . '\']';
break;
case 'obj': // 识别为对象
$parseStr = $first . '->' . implode('->', $vars);
break;
default: // 自动判断数组或对象
$parseStr = '(is_array(' . $first . ')?' . $first . '[\'' . implode('\'][\'', $vars) . '\']:' . $first . '->' . implode('->', $vars) . ')';
}
}
} else {
$parseStr = str_replace(':', '->', $match[0]);
}
$_varParseList[$match[0]] = $parseStr;
}
$varStr = substr_replace($varStr, $parseStr, $match[1], strlen($match[0]));
}
unset($matches);
}
return;
}
/**
* 对模板中使用了函数的变量进行解析
* 格式 {$varname|function1|function2=arg1,arg2}
* @access public
* @param string $varStr 变量字符串
* @return void
*/
public function parseVarFunction(&$varStr)
{
if (false == strpos($varStr, '|')) {
return;
}
static $_varFunctionList = [];
$_key = md5($varStr);
//如果已经解析过该变量字串，则直接返回变量值
if (isset($_varFunctionList[$_key])) {
$varStr = $_varFunctionList[$_key];
} else {
$varArray = explode('|', $varStr);
// 取得变量名称
$name = array_shift($varArray);
// 对变量使用函数
$length = count($varArray);
// 取得模板禁止使用函数列表
$template_deny_funs = explode(',', $this->config['tpl_deny_func_list']);
for ($i = 0; $i < $length; $i++) {
$args = explode('=', $varArray[$i], 2);
// 模板函数过滤
$fun = trim($args[0]);
switch ($fun) {
case 'default': // 特殊模板函数
if (false === strpos($name, '(')) {
$name = '(isset(' . $name . ') && (' . $name . ' !== \'\')?' . $name . ':' . $args[1] . ')';
} else {
$name = '(' . $name . ' ?: ' . $args[1] . ')';
}
break;
default: // 通用模板函数
if (!in_array($fun, $template_deny_funs)) {
if (isset($args[1])) {
if (strstr($args[1], '###')) {
$args[1] = str_replace('###', $name, $args[1]);
$name = "$fun($args[1])";
} else {
$name = "$fun($name,$args[1])";
}
} else {
if (!empty($args[0])) {
$name = "$fun($name)";
}
}
}
}
}
$_varFunctionList[$_key] = $name;
$varStr = $name;
}
return;
}
/**
* 特殊模板变量解析
* 格式 以 $Think. 打头的变量属于特殊模板变量
* @access public
* @param array $vars 变量数组
* @return string
*/
public function parseThinkVar($vars)
{
$type = strtoupper(trim(array_shift($vars)));
$param = implode('.', $vars);
if ($vars) {
switch ($type) {
case 'SERVER':
$parseStr = '\\think\\Request::instance()->server(\'' . $param . '\')';
break;
case 'GET':
$parseStr = '\\think\\Request::instance()->get(\'' . $param . '\')';
break;
case 'POST':
$parseStr = '\\think\\Request::instance()->post(\'' . $param . '\')';
break;
case 'COOKIE':
$parseStr = '\\think\\Cookie::get(\'' . $param . '\')';
break;
case 'SESSION':
$parseStr = '\\think\\Session::get(\'' . $param . '\')';
break;
case 'ENV':
$parseStr = '\\think\\Request::instance()->env(\'' . $param . '\')';
break;
case 'REQUEST':
$parseStr = '\\think\\Request::instance()->request(\'' . $param . '\')';
break;
case 'CONST':
$parseStr = strtoupper($param);
break;
case 'LANG':
$parseStr = '\\think\\Lang::get(\'' . $param . '\')';
break;
case 'CONFIG':
$parseStr = '\\think\\Config::get(\'' . $param . '\')';
break;
default:
$parseStr = '\'\'';
break;
}
} else {
switch ($type) {
case 'NOW':
$parseStr = "date('Y-m-d g:i a',time())";
break;
case 'VERSION':
$parseStr = 'THINK_VERSION';
break;
case 'LDELIM':
$parseStr = '\'' . ltrim($this->config['tpl_begin'], '\\') . '\'';
break;
case 'RDELIM':
$parseStr = '\'' . ltrim($this->config['tpl_end'], '\\') . '\'';
break;
default:
if (defined($type)) {
$parseStr = $type;
} else {
$parseStr = '';
}
}
}
return $parseStr;
}
/**
* 分析加载的模板文件并读取内容 支持多个模板文件读取
* @access private
* @param string $templateName 模板文件名
* @return string
*/
private function parseTemplateName($templateName)
{
$array = explode(',', $templateName);
$parseStr = '';
foreach ($array as $templateName) {
if (empty($templateName)) {
continue;
}
if (0 === strpos($templateName, '$')) {
//支持加载变量文件名
$templateName = $this->get(substr($templateName, 1));
}
$template = $this->parseTemplateFile($templateName);
if ($template) {
// 获取模板文件内容
$parseStr .= file_get_contents($template);
}
}
return $parseStr;
}
/**
* 解析模板文件名
* @access private
* @param string $template 文件名
* @return string|false
*/
private function parseTemplateFile($template)
{
if ('' == pathinfo($template, PATHINFO_EXTENSION)) {
if (strpos($template, '@')) {
list($module, $template) = explode('@', $template);
}
if (0 !== strpos($template, '/')) {
$template = str_replace(['/', ':'], $this->config['view_depr'], $template);
} else {
$template = str_replace(['/', ':'], $this->config['view_depr'], substr($template, 1));
}
if ($this->config['view_base']) {
$module = isset($module) ? $module : Request::instance()->module();
$path = $this->config['view_base'] . ($module ? $module . DS : '');
} else {
$path = isset($module) ? APP_PATH . $module . DS . basename($this->config['view_path']) . DS : $this->config['view_path'];
}
$template = $path . $template . '.' . ltrim($this->config['view_suffix'], '.');
}
if (is_file($template)) {
// 记录模板文件的更新时间
$this->includeFile[$template] = filemtime($template);
return $template;
} else {
throw new TemplateNotFoundException('template not exists:' . $template, $template);
}
}
/**
* 按标签生成正则
* @access private
* @param string $tagName 标签名
* @return string
*/
private function getRegex($tagName)
{
$regex = '';
if ('tag' == $tagName) {
$begin = $this->config['tpl_begin'];
$end = $this->config['tpl_end'];
if (strlen(ltrim($begin, '\\')) == 1 && strlen(ltrim($end, '\\')) == 1) {
$regex = $begin . '((?:[\$]{1,2}[a-wA-w_]|[\:\~][\$a-wA-w_]|[+]{2}[\$][a-wA-w_]|[-]{2}[\$][a-wA-w_]|\/[\*\/])(?>[^' . $end . ']*))' . $end;
} else {
$regex = $begin . '((?:[\$]{1,2}[a-wA-w_]|[\:\~][\$a-wA-w_]|[+]{2}[\$][a-wA-w_]|[-]{2}[\$][a-wA-w_]|\/[\*\/])(?>(?:(?!' . $end . ').)*))' . $end;
}
} else {
$begin = $this->config['taglib_begin'];
$end = $this->config['taglib_end'];
$single = strlen(ltrim($begin, '\\')) == 1 && strlen(ltrim($end, '\\')) == 1 ? true : false;
switch ($tagName) {
case 'block':
if ($single) {
$regex = $begin . '(?:' . $tagName . '\b(?>(?:(?!name=).)*)\bname=([\'\"])(?P<name>[\$\w\-\/\.]+)\\1(?>[^' . $end . ']*)|\/' . $tagName . ')' . $end;
} else {
$regex = $begin . '(?:' . $tagName . '\b(?>(?:(?!name=).)*)\bname=([\'\"])(?P<name>[\$\w\-\/\.]+)\\1(?>(?:(?!' . $end . ').)*)|\/' . $tagName . ')' . $end;
}
break;
case 'literal':
if ($single) {
$regex = '(' . $begin . $tagName . '\b(?>[^' . $end . ']*)' . $end . ')';
$regex .= '(?:(?>[^' . $begin . ']*)(?>(?!' . $begin . '(?>' . $tagName . '\b[^' . $end . ']*|\/' . $tagName . ')' . $end . ')' . $begin . '[^' . $begin . ']*)*)';
$regex .= '(' . $begin . '\/' . $tagName . $end . ')';
} else {
$regex = '(' . $begin . $tagName . '\b(?>(?:(?!' . $end . ').)*)' . $end . ')';
$regex .= '(?:(?>(?:(?!' . $begin . ').)*)(?>(?!' . $begin . '(?>' . $tagName . '\b(?>(?:(?!' . $end . ').)*)|\/' . $tagName . ')' . $end . ')' . $begin . '(?>(?:(?!' . $begin . ').)*))*)';
$regex .= '(' . $begin . '\/' . $tagName . $end . ')';
}
break;
case 'restoreliteral':
$regex = '<!--###literal(\d+)###-->';
break;
case 'include':
$name = 'file';
case 'taglib':
case 'layout':
case 'extend':
if (empty($name)) {
$name = 'name';
}
if ($single) {
$regex = $begin . $tagName . '\b(?>(?:(?!' . $name . '=).)*)\b' . $name . '=([\'\"])(?P<name>[\$\w\-\/\.\:@,\\\\]+)\\1(?>[^' . $end . ']*)' . $end;
} else {
$regex = $begin . $tagName . '\b(?>(?:(?!' . $name . '=).)*)\b' . $name . '=([\'\"])(?P<name>[\$\w\-\/\.\:@,\\\\]+)\\1(?>(?:(?!' . $end . ').)*)' . $end;
}
break;
}
}
return '/' . $regex . '/is';
}
}
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