
The note about the signature of the ReflectionParameter constructor is actually incomplete, at least in 5.2.5: it is possible to use an integer for the second parameter, and the constructor will use it to return the n-th parameter.


This allows you to obtain proper ReflectionParameter objects even when documenting code from extensions which (strangely enough) define several parameters with the same name. The string-based constructor always returns the first parameter with the matching name, whereas the integer-based constructor correctly returns the n-th parameter.


So, in short, this works:

<?php

// supposing the extension defined something like:

// Some_Class::someMethod($a, $x, $y, $x, $y)

$p = new ReflectionParameter(array('Some_Class', 'someMethod'), 4);

// returns the last parameter, whereas

$p = new ReflectionParameter(array('Some_Class', 'someMethod'), 'y');

// always returns the first $y at position 2

?>

down

killgecNOFSPAM at gmail dot com ¶

14 years ago


Signature of constructor of ReflectionParameter correctly is:


public function __construct(array/string $function, string $name);


where $function is either a name of a global function, or a class/method name pair.

down

massimo at mmware dot it ¶

14 years ago


I found these limitations using class ReflectionParameter from ReflectionFunction with INTERNAL FUNCTIONS (eg print_r, str_replace, ... ) :


1. parameter names don't match with manual: (try example 19.35 with arg "call_user_func" )

2. some functions (eg PCRE function, preg_match etc) have EMPTY parameter names 

3. calling getDefaultValue on Parameters will result in Exception "Cannot determine default value for internal functions"

add a note

官方地址：https://www.php.net/manual/en/class.reflectionparameter.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 开发编程科技 Elasticsearch HTML/CSS/XML 网络数据库 JAVA 面试 NoSQL C/C++ Golang Git 算法操作系统正则表达式 Redis 互联网 MySql JavaScript 运维软件国际架构设计 Mac OS TCP/IP Excel Vim Windows Socket Oracle VR MongoDB Python 运营 MemCache 商业硬件电子娱乐设计 nginx 摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 [PHP] inet_pton/inet_ntop IP地址转换函数 [鸟哥]PHP_INT_MIN 和 -9223372036854775808 PHP 8.1 ADORecordSet对象 adodb手册 opcache预加载 Composer的Packagist资源 array_multisort() 多字段排序 PHPMailer设置utf8 PHPMailer字符集CharSet mysql面试题 PHP json解析（json_decode）页面工具 php中几种注释规范纯php实现DES以及TripleDES加密算法 [原创]诡异的php-fpm超时问题 php上周一、本周一、下周一日期 php扩展开发 Packagist / Composer 中国全量镜像

略微加速

PHP官方手册 - 互联网笔记

ReflectionParameter 类

简介

类摘要

属性

目录

User Contributed Notes 3 notes