Analysis of common functions of Common/common.php file in ThinkPHP, _PHP tutorial

Analysis of common functions of the Common/common.php file in ThinkPHP.

This article analyzes the common functions of the ThinkPHP/Common/common.php file through examples. 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 all 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 ;
    }
}

PS: Here are several formatting/beautifying/conversion tools recommended on this site to help you sort out the messy code. I believe everyone can use it in future development:

php code online formatting and beautification tool:
http://tools.jb51.net/code/phpformat

JavaScript code beautification/compression/formatting/encryption tool:
http://tools.jb51.net/code/jscompress

Online XML formatting/compression tool:
http://tools.jb51.net/code/xmlformat

JSON code formatting and beautification tool:
http://tools.jb51.net/code/json

Online XML/JSON conversion tool:
http://tools.jb51.net/code/xmljson

JSON code online formatting/beautifying/compressing/editing/conversion tool:
http://tools.jb51.net/code/jsoncodeformat

SQL code online formatting and beautification tool:
http://tools.jb51.net/code/sqlcodeformat

Readers who are interested in more thinkPHP-related content can check out the special topics on this site: "Introduction to ThinkPHP Tutorial", "Summary of Common Methods of ThinkPHP", "Summary of Cookie Usage in PHP", "Basic Tutorial for Getting Started with Smarty Templates" and "PHP Template technology summary".

I hope this article will be helpful to everyone’s PHP programming based on the ThinkPHP framework.

http://www.bkjia.com/PHPjc/1133128.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1133128.htmlTechArticleAnalysis of common functions of the Common/common.php file in ThinkPHP. This article analyzes ThinkPHP/Common/common.php with examples File common functions. Share it with everyone for your reference, the details are as follows:...