反射API（一）

<?php

function classData(ReflectionClass $class)
{
    echo '<hr>';
    $details = '当前文件：';
    $details .= $class->getFilename() . PHP_EOL;
    $details .= '类名：' . $class->getName() . PHP_EOL;
    $details .= '起始行：' . $class->getStartLine() . PHP_EOL;
    $details .= '结束行：' . $class->getEndLine() . PHP_EOL;
    if ($class->isUserDefined()) {
        $details .= '由用户定义' . PHP_EOL;
    }
    if ($class->isInternal()) {
        $details .= '由扩展或核心在内部定义' . PHP_EOL;
    }
    if ($class->isInterface()) {
        $details .= '是一个接口' . PHP_EOL;
    }
    if ($class->isAbstract()) {
        $details .= '是final类' . PHP_EOL;
    }
    if ($class->isFinal()) {
        $details .= '是抽象类' . PHP_EOL;
    }
    if ($class->isInstantiable()) {
        $details .= '可实例化' . PHP_EOL;
    } else {
        $details .= '不能实例化' . PHP_EOL;
    }
    return $details;
}

function methodData(ReflectionMethod $method)
{
    echo '<hr>';
    $details = '当前文件：';
    $details .= $method->getFilename() . PHP_EOL;
    $details .= '方法名：' . $method->getName() . PHP_EOL;
    $details .= '起始行：' . $method->getStartLine() . PHP_EOL;
    $details .= '结束行：' . $method->getEndLine() . PHP_EOL;
    if ($method->isUserDefined()) {
        $details .= '用户定义' . PHP_EOL;
    }
    if ($method->isInternal()) {
        $details .= '是内置函数' . PHP_EOL;
    }
    if ($method->isPublic()) {
        $details .= '是公开方法' . PHP_EOL;
    }
    if ($method->isProtected()) {
        $details .= '是保护方法' . PHP_EOL;
    }
    if ($method->isPrivate()) {
        $details .= '是私有方法' . PHP_EOL;
    }
    if ($method->isStatic()) {
        $details .= '是静态方法' . PHP_EOL;
    }
    if ($method->isFinal()) {
        $details .= '是定义final' . PHP_EOL;
    }
    if ($method->isConstructor()) {
        $details .= '是构造方法' . PHP_EOL;
    }
    if ($method->returnsReference()) {
        // 只有在方法前加 & 才返回true
        $details .= '返回参考信息' . PHP_EOL;
    }
    // var_dump($method->getDocComment());

    return $details;
}

function argData(ReflectionParameter $arg)
{
    echo '<hr>';
    $details = '';
    $declaringclass = $arg->getDeclaringClass();
    $name = $arg->getName();
    $class = $arg->getClass();
    $position = $arg->getPosition();
    $details .= $name . '是' . $position . '个参数' . PHP_EOL;
    if (!empty($class)) {
        $classname = $class->getName();
        $details .= $name . '必须是' . $classname . '的对象' . PHP_EOL;
    }
    if ($arg->isPassedByReference()) {
        $details .= $name . '是引用传值' . PHP_EOL;
    }
    if ($arg->isDefaultValueAvailable()) {
        $details .= $name . '有默认值' . PHP_EOL;
    }

    return $details;
}

class A
{

}

class Product
{
    public $name;
    protected $price;
    private $obj;

    public function __construct(&$name, $price = 5.99, A $a = null)
    {
        $this->name = $name;
        $this->price = $price;
    }

    /**
     * [say description]
     * @return [type] [description]
     */
    public function say()
    {
        echo 'name:' . $this->name . ' price:' . $this . price;
    }
}

echo '<pre>';
$obj = new ReflectionClass('Product');
echo classData($obj);

foreach ($obj->getMethods() as $key => $value) {
    echo methodData($value);
}

foreach ($obj->getMethod('__construct')->getParameters() as $key => $value) {
    echo argData($value);
}

// var_dump(Reflection::export($obj));
// var_dump(ReflectionClass::export('Product'));
// var_dump(ReflectionMethod::export('Product', 'say'));