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13 years ago
<?php
/**
* ReflectionHelper class file.
*
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2012 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\util;
/**
* ReflectionHelper
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class ReflectionHelper
{
/**
* Prepares parameters so that they can be bound to the specified method.
* This method mainly helps method parameter binding. It converts `$params`
* into an array which can be passed to `call_user_func_array()` when calling
* the specified method. The conversion is based on the matching of method parameter names
* and the input array keys. For example,
*
* ~~~
* class Foo {
* function bar($a, $b) { ... }
* }
*
* $method = new \ReflectionMethod('Foo', 'bar');
* $params = array('b' => 2, 'c' => 3, 'a' => 1);
* var_export(ReflectionHelper::bindMethodParams($method, $params));
* // would output: array('a' => 1, 'b' => 2)
* ~~~
*
* @param \ReflectionMethod $method the method reflection
* @param array $params the parameters in terms of name-value pairs
* @return array|boolean the parameters that can be passed to the method via `call_user_func_array()`.
* False is returned if the input parameters do not follow the method declaration.
*/
public static function bindParams($method, $params)
{
$ps = array();
foreach ($method->getParameters() as $param) {
$name = $param->getName();
if (array_key_exists($name, $params)) {
if ($param->isArray()) {
$ps[$name] = is_array($params[$name]) ? $params[$name] : array($params[$name]);
} elseif (!is_array($params[$name])) {
$ps[$name] = $params[$name];
} else {
return false;
}
} elseif ($param->isDefaultValueAvailable()) {
$ps[$name] = $param->getDefaultValue();
} else {
return false;
}
}
return $ps;
}
}