This question already has an answer here: What's the difference between if(!Variable) and if(isset($variable))? 3 answers This just checks to see if $_GET['name'] is non false. Ie it is set and not empty, the empty string, 0 etc More information here.
这个问题在这里已经有了答案： if（！Variable）和if（isset（$ variable））之间有什么区别？ 3个答案 这只是检查$_GET['name']是否为非假。 即它被设置而不是空的，空字符串， 0等 更多信息在这里。
I know what PSR-0 is, and how, why, where to use it. I've googled for this and looked around stackoverflow related posts, but could not find anything. Even on its official page there's no such definition. So, the question is, what does PSR-0 exactly stand for ? PSR代表PHP标准建议，如http://www.php-fig.org/faqs/#what-does-psr-stand-for和http://www.php-fig.org/psr/中所述。 PSR is a
我知道PSR-0是什么，以及如何使用它。 我GOOGLE了这个四处张望计算器相关的职位，但找不到任何东西。 即使在官方网页上也没有这样的定义。 所以，问题是， PSR-0究竟代表什么？ PSR代表PHP标准建议，如http://www.php-fig.org/faqs/#what-does-psr-stand-for和http://www.php-fig.org/psr/中所述。 PSR是用于定义PHP编码标准的规范。 目前有六个接受的建议： PSR-0 PSR-1 PSR-2 PSR-3 PSR-4 PSR-7 每个处
Possible Duplicate: What does “===” mean? i am seeing === often in php statements, but don't know what it mean. eg if ($pwd === PwdHash($pass,substr($pwd,0,9))). thanks It tests equality, but unlike == it requires that the two operands be of the same type as well as value. For instance, "1" == 1 will be true, but "1" === 1 is false because the type is different.
可能重复： “===”是什么意思？ 我经常在php语句中看到===，但不知道它是什么意思。 例如if（$ pwd === PwdHash（$ pass，substr（$ pwd，0,9）））。 谢谢 它测试相等性，但与==不同，它要求两个操作数具有相同的类型和值。 例如， "1" == 1将为真，但"1" === 1是错误的，因为类型不同。 PHP有两种相同的比较运算符==和=== ==检查均衡但不严格意味着它会返回true（'123'== 123） ==
I've come across some interesting usage of the || operator in a return command, and would appreciate it if someone could confirm exactly what is going on (if I understand it, I can use it myself in the future) The code is return ( empty($neededRole) || strcasecmp($role, 'admin') == 0 || strcasecmp($role, $neededRole) == 0 ); $neededRole and $role are eith
我遇到过||的一些有趣用法 如果有人能够确切地确认发生了什么（如果我明白了，我可以在将来自己使用它）。 代码是 return ( empty($neededRole) || strcasecmp($role, 'admin') == 0 || strcasecmp($role, $neededRole) == 0 ); $ neededRole和$ role都是null，'admin'或'manager' 我正在阅读它： 如果$neededRole为空，则不需要进一步检查。 返回true（并停止检查
Possible Duplicate: Regarding if statements in PHP In PHP scripts - what does an if statement like this check for? <?php if($variable){ // code to be executed } ?> I've seen it used in scripts several times, and now I really want to know what it "looks for". It's not missing anything; it's just a plain variable inside an if statement... I couldn't find an
可能重复： 关于PHP中的if语句 在PHP脚本中 - 像这样的if语句检查什么？ <?php if($variable){ // code to be executed } ?> 我已经多次看到它在脚本中使用，现在我真的想知道它“寻找什么”。 它不会错过任何东西; 它只是一个在if语句中的简单变量......我无法在任何地方找到任何关于此的结果，所以很明显，我会看起来很愚蠢。 构造if ($variable)测试以查看$variable是否计算为任何“真值”值。 它可以是布尔值
I have a web application on a Linux server which starts with <? I needed to copy this application to a windows environment and everything is working fine except that an SQL statement is being rendered differently. I don't know if this has to do with the script beginning with <?php instead of <? because I don't know from where to enable the <? from the PHP.ini so I changed
我在Linux服务器上有一个以<?开头的Web应用程序<? 我需要将这个应用程序复制到一个Windows环境中，并且一切正常，除了SQL语句呈现不同之外。 我不知道这是否与以<?php而不是<?开始的脚本有关<? 因为我不知道从哪里启用<? 来自PHP.ini所以我将它改为<?php 我知道这两个陈述应该是相同的，但我需要用<?来测试它<? 以确保应用程序完全相同。 这样我可以消除另一种可能性。 谢谢 组 short_o
I'm sorry for being such a dumb ass. I'm following a tutorial to add admin routing to my cakephp application that I'm trying to create as a learning exercise. The tutorial isn't hugely well explained (I think I'm just too much of a beginner in reality) and I don't understand the following, could anyone please tell me in english what is happening here. public function i
我很抱歉成为这样一个愚蠢的屁股。 我正在学习一个教程，将管理路由添加到我试图创建的cakephp应用程序中作为学习练习。 该教程没有得到很好的解释（我认为我实际上只是一个初学者太多），我不明白以下内容，请问任何人都可以用英文告诉我这里发生了什么。 public function isAuthorized() { $role = $this->Auth->user('role'); $neededRole = null; $prefix = !empty($this->params['pref
I started by googling, and found this article which talks about mutex tables. I have a table with ~14 million records. If I want to add more data in the same format, is there a way to ensure the record I want to insert does not already exist without using a pair of queries (ie, one query to check and one to insert is the result set is empty)? Does a unique constraint on a field guarantee the
我开始用google搜索，并找到了这篇谈论互斥表的文章。 我有一张约有1400万条记录的表格。 如果我想在相同的格式添加更多的数据，是有办法，以确保我要插入不使用对查询不存在的记录（即，一个查询检查和一个插入的结果集空）？ 一个字段上的unique约束是否保证insert将会失败，如果它已经在那里？ 似乎只有一个约束，当我通过php发布插入时，脚本就会呱呱叫。 使用INSERT IGNORE INTO table 请参阅http://bogdan.org.
In PHP, is there any difference between the != and <> operators? In the manual, it states: $a != $b Not equal TRUE if $a is not equal to $b after type juggling. $a <> $b Not equal TRUE if $a is not equal to $b after type juggling. I guess there are no huge differences but I'm curious. In the main Zend implementation there is not any difference. You can get it from
在PHP中， !=和<>运算符有什么不同？ 在手册中，它指出： $a != $b Not equal TRUE if $a is not equal to $b after type juggling. $a <> $b Not equal TRUE if $a is not equal to $b after type juggling. 我想这并没有太大的区别，但我很好奇。 在Zend的主要实现中，没有任何区别。 您可以从PHP语言扫描器的Flex描述中获得它： <ST_IN_SCRIPTING>"!="|"<>" { return T_IS_NOT_
So, in PHPDoc one can specify @var above the member variable declaration to hint at its type. Then an IDE, for ex. PHPEd, will know what type of object it's working with and will be able to provide a code insight for that variable. <?php class Test { /** @var SomeObj */ private $someObjInstance; } ?> This works great until I need to do the same to an array of objects t
因此，在PHPDoc中，可以在成员变量声明之上指定@var来提示其类型。 然后一个IDE，例如。 PHPEd会知道它正在处理什么类型的对象，并能够提供对该变量的代码洞察。 <?php class Test { /** @var SomeObj */ private $someObjInstance; } ?> 这很有效，直到我需要对一组对象做同样的事情，以便在稍后迭代这些对象时能够得到适当的提示。 那么，有没有办法声明一个PHPDoc标签来指定成员变量是SomeObj的数