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