Get function documentation using PHP reflection mechanism
反射 Reflection
反射可以简单理解为扫描类的属性、方法和注释的能力。
用法
PHP 为我们提供了丰富的方法,使我们可以方便的使用。
$reflect = new ReflectionClass('App\Foo'); $reflect->getMethods(); // 获取方法的数组 $reflect->getDocComment(); // 获取文档注释 ……
应用
有时系统需要向用户提供内置方法文档说明来使用,那么我们则可以通过 PHP 反射实现。
创建内置函数类
class FooFunction{ /** * 获取当前周周一时间戳 * * @return false|string */ public static function mondayTimeStamp(){ $targetTime = strtotime('now'); $w = date('w', $targetTime); $w = ($w == 0 ? 7 : $w); return mktime(0,0,0, date('m', $targetTime), date('d', $targetTime)-($w-1), date('Y', $targetTime)); } /** * 获取当前周周一日期 * * @return false|string */ public static function mondayDate(){ return date('Y-m-d', self::mondayTimeStamp()); } }
扫描内置函数类,生成文档
// 利用 PHP 反射 $reflect = new ReflectionClass('FooFunction'); $data = []; // 获取类中的方法 $methods = $reflect->getMethods(); foreach ($methods as $method){ $methodName = $method->getName(); $methodDocStr = $reflect->getMethod($methodName)->getDocComment(); // 过滤方法注释前面的(*) $pattern = "/[@a-zA-Z\\x{4e00}-\\x{9fa5}]+.*/u"; preg_match_all($pattern, $methodDocStr, $matches, PREG_PATTERN_ORDER); $data[] = [ 'name' => $methodName, 'doc' => $matches[0] ]; } echo json_encode($data);
结果
[ { "name": "mondayTimeStamp", "doc": [ "返回当前周周一时间戳", "@return false|string" ] }, { "name": "mondayDate", "doc": [ "返回当前周周一日期", "@return false|string" ] } ]
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