


Function analysis of common functions of Common/common.php file in ThinkPHP
This article mainly introduces the common functions of the Common/common.php file in ThinkPHP. It analyzes the functions and code principles of the C method, tag method, B method and autoload method in detail in the form of comments. Friends in need can refer to it. The following
example analyzes the common functions of the ThinkPHP/Common/common.php file. Share it with everyone for your reference, the details are as follows:
/** * 获取和设置配置参数 支持批量定义 * @param string|array $name 配置变量 * @param mixed $value 配置值 * @return mixed */ function C($name=null, $value=null) { static $_config = array(); // 无参数时获取所有 if (empty($name)) { if(!empty($value) && $array = cache('c_'.$value)) { //array_change_key_case():将数组中的所有键名改为全小写或大写,默认会改为全小写 $_config = array_merge($_config, array_change_key_case($array)); } return $_config; } // 优先执行设置获取或赋值,如果参数2为空,则为获取配置配置变量的值的情况;如果参数2不为空,则是为配置变量设置值的情况 if (is_string($name)) {//给配置变量设置值或者获取配置变量的值 if (!strpos($name, '.')) {//如果配置变量名中没有".",则执行下面代码 $name = strtolower($name);//将配置变量名转化为小写 if (is_null($value)) return isset($_config[$name]) ? $_config[$name] : null;//获取配置变量值的情况,返回配置变量的值 $_config[$name] = $value;//给配置变量设置值的情况 return; } // 二维数组设置和获取支持 $name = explode('.', $name); $name[0] = strtolower($name[0]); if (is_null($value)) return isset($_config[$name[0]][$name[1]]) ? $_config[$name[0]][$name[1]] : null;//获取值的情况 $_config[$name[0]][$name[1]] = $value;//赋值的情况 return; } // 批量设置 if (is_array($name)){//批量设置值 //array_change_key_case():将数组中的所有键名改为全小写或大写,默认会改为全小写,注意:只是将键名改为小写哦 $_config = array_merge($_config, array_change_key_case($name)); if(!empty($value)) {// 保存配置值 cache('c_'.$value,$_config); } return; } return null; // 避免非法参数 }
/** * 处理标签扩展,如: 项目开始标签的调用,tag('app_begin'); * @param string $tag 标签名称 * @param mixed $params 传入参数 * @return mixed */ function tag($tag, &$params=NULL) { // 系统或框架标签扩展 // C('extends', include THINK_PATH.'Conf/tags.php');//这个文件很重要 $extends = C('extends.' . $tag);//$_config['extends'][app_init] // 应用或项目标签扩展 // C('tags', include CONF_PATH.'tags.php'); //项目中也可以编写自己的tags.php文件 $tags = C('tags.' . $tag);//$_config['tags'][app_init] if (!empty($tags)) {//如果$tags不为空 if(empty($tags['_overlay']) && !empty($extends)) { // 合并扩展 $tags = array_unique(array_merge($extends,$tags)); }elseif(isset($tags['_overlay'])){ // 通过设置 '_overlay'=>1 覆盖系统标签 unset($tags['_overlay']); } }elseif(!empty($extends)) { $tags = $extends; } if($tags) { if(APP_DEBUG) { G($tag.'Start'); trace('[ '.$tag.' ] --START--','','INFO'); } // 执行扩展 foreach ($tags as $key=>$name) { if(!is_int($key)) { // 指定行为类的完整路径 用于模式扩展 $name = $key; } //创建行为类对象,如:$class=$name.'Behavior';$behavior = new $class();//创建一个行为类对象 B($name, $params);//执行某个行为,参数1-行为名称 参数2-传入的参数 } if(APP_DEBUG) { // 记录行为的执行日志 trace('[ '.$tag.' ] --END-- [ RunTime:'.G($tag.'Start',$tag.'End',6).'s ]','','INFO'); } }else{ // 未执行任何行为 返回false return false; } }
/** * 执行某个行为 * @param string $name 行为名称 * @param Mixed $params 传人的参数 * @return void */ function B($name, &$params=NULL) { //行为类在Think.class.php文件中的autoload($class)函数中自动加载 $class = $name.'Behavior';//行为类的名称 G('behaviorStart'); $behavior = new $class();//创建一个行为类对象 $behavior->run($params);//给当前行为类对象传递参数 if(APP_DEBUG) { // 记录行为的执行日志 trace('Run '.$name.' Behavior [ RunTime:'.G('behaviorStart','behaviorEnd',6).'s ]','','INFO'); } }
Note: Behavior classes, model classes, and controller classes are automatically loaded in the autoload function in the Think.class.php file:
/** * 系统自动加载ThinkPHP类库 * 并且支持配置自动加载路径 * @param string $class 对象类名 * @return void */ //行为类、模型类、控制器类 都是通过autoload函数自动加载的 public static function autoload($class) { // 检查是否存在别名定义 if(alias_import($class)) return ; //行为类都是通过此函数自动加载的 if(substr($class,-8)=='Behavior') { // 加载行为 if(require_cache(CORE_PATH.'Behavior/'.$class.'.class.php') || require_cache(EXTEND_PATH.'Behavior/'.$class.'.class.php') || require_cache(LIB_PATH.'Behavior/'.$class.'.class.php') || (defined('MODE_NAME') && require_cache(MODE_PATH.ucwords(MODE_NAME).'/Behavior/'.$class.'.class.php'))) { return ; } }elseif(substr($class,-5)=='Model'){ // 加载模型 if((defined('GROUP_NAME') && require_cache(LIB_PATH.'Model/'.GROUP_NAME.'/'.$class.'.class.php')) || require_cache(LIB_PATH.'Model/'.$class.'.class.php') || require_cache(EXTEND_PATH.'Model/'.$class.'.class.php') ) { return ; } }elseif(substr($class,-6)=='Action'){ // 加载控制器 if((defined('GROUP_NAME') && require_cache(LIB_PATH.'Action/'.GROUP_NAME.'/'.$class.'.class.php')) || require_cache(LIB_PATH.'Action/'.$class.'.class.php') || require_cache(EXTEND_PATH.'Action/'.$class.'.class.php') ) { return ; } } // 根据自动加载路径设置进行尝试搜索 $paths = explode(',',C('APP_AUTOLOAD_PATH')); foreach ($paths as $path){ if(import($path.'.'.$class)) // 如果加载类成功则返回 return ; } }
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