Removing array item by value

I need to remove array item with given value: if (in_array($id, $items)) { $items = array_flip($items); unset($items[ $id ]); $items = array_flip($items); } Could it be done in shorter (more efficient) way? It can be accomplished with a simple one-liner. Having this array: $arr = array('nice_item', 'remove_me', 'another_liked_item', 'remove_me_also'); You can do: $arr = array

按值删除数组项

我需要删除给定值的数组项: if (in_array($id, $items)) { $items = array_flip($items); unset($items[ $id ]); $items = array_flip($items); } 它能以更短(更高效)的方式完成吗? 它可以用一个简单的单线来完成。 拥有这个数组: $arr = array('nice_item', 'remove_me', 'another_liked_item', 'remove_me_also'); 你可以做: $arr = array_diff($arr, array('remove_me', 'remove_me_also')); $ar

Will copy

I am programming a web API client in PHP that parses CSV data into associative arrays and I want to protect my users from data-duplication when using these arrays. My users will never be writing to these arrays (theoretically they could but it makes no sense in practice). Now my question is... if my users pass these arrays around as arguments to methods, will PHP's copy-on-write mechanism

将复制

我正在用PHP编写一个Web API客户端,它将CSV数据分析为关联数组,并且我希望在使用这些数组时保护用户免受数据重复。 我的用户永远不会写这些数组(理论上他们可以但在实践中没有意义)。 现在我的问题是......如果我的用户将这些数组作为参数传递给方法,PHP的copy-on-write机制是否可以防止数据重复,或者是否有任何方法没有明确接受对数组的引用会得到完整的副本的数组? 如名称所示,在写入时复制意味着没有变量正在复

Finding the number of days between two dates

如何使用PHP查找两个日期之间的天数? $now = time(); // or your date as well $your_date = strtotime("2010-01-01"); $datediff = $now - $your_date; echo round($datediff / (60 * 60 * 24)); 如果您使用PHP 5.3 > ,这是计算差异的最准确的方法: $date1 = new DateTime("2010-07-06"); $date2 = new DateTime("2010-07-09"); $diff = $date2->diff($date1)->format("%a"); From PHP Version 5.3 and up, new da

查找两个日期之间的天数

如何使用PHP查找两个日期之间的天数? $now = time(); // or your date as well $your_date = strtotime("2010-01-01"); $datediff = $now - $your_date; echo round($datediff / (60 * 60 * 24)); 如果您使用PHP 5.3 > ,这是计算差异的最准确的方法: $date1 = new DateTime("2010-07-06"); $date2 = new DateTime("2010-07-09"); $diff = $date2->diff($date1)->format("%a"); 从PHP 5.3及更高版本开始,新的日期/

How to find the last day of the month from date?

How can I get the last day of the month in PHP? Given: $a_date = "2009-11-23" I want 2009-11-30; and given $a_date = "2009-12-23" I want 2009-12-31. t返回天在一个特定的日期(请参阅文档月份的数字date ): $a_date = "2009-11-23"; echo date("Y-m-t", strtotime($a_date)); The code using strtotime() will fail after year 2038. (as given in the first answer in this thread) For example try using

如何从日期查找月份的最后一天?

我怎样才能在PHP中获得本月的最后一天? 鉴于: $a_date = "2009-11-23" 我想要2009-11-30; 并给出 $a_date = "2009-12-23" 我想要2009-12-31。 t返回天在一个特定的日期(请参阅文档月份的数字date ): $a_date = "2009-11-23"; echo date("Y-m-t", strtotime($a_date)); 使用strtotime()的代码将在2038年后失败。(如在此线程的第一个答案中给出的)例如,尝试使用以下内容: $a_date = "2040-11-23"; echo date(

use of `&` keyword in PHP

Possible Duplicate: Reference - What does this symbol mean in PHP? I find it difficult searching this in google, what's the use of the & keyword in PHP? A handful of examples would greatly help. Thank you, I'm a java student. Passing by reference.Check this link http://theserverpages.com/php/manual/en/language.references.pass.php http://www.php.net/manual/en/language.refer

在PHP中使用`&`关键字

可能重复: 参考 - 这个符号在PHP中的含义是什么? 我发现很难在谷歌搜索这个,在PHP中使用&关键字是什么? 少数例子会有很大的帮助。 谢谢你,我是一名java学生。 通过引用传递。请检查此链接 http://theserverpages.com/php/manual/en/language.references.pass.php http://www.php.net/manual/en/language.references.return.php 变量前面的和号表示它是对变量的引用而不是值的副本。

Is there a valid technical use for returning by reference in PHP5

My question is a follow up to the following question: What does it mean to start a php function with an ampersand? The example code used in the question is this: class FacebookRestClient { ... public function &users_hasAppPermission($ext_perm, $uid=null) { return $this->call_method('facebook.users.hasAppPermission', array('ext_perm' => $ext_perm, 'uid' => $uid

在PHP5中是否有引用返回的有效技术用途?

我的问题是对以下问题的跟进:使用&符号启动一个PHP函数是什么意思? 问题中使用的示例代码是这样的: class FacebookRestClient { ... public function &users_hasAppPermission($ext_perm, $uid=null) { return $this->call_method('facebook.users.hasAppPermission', array('ext_perm' => $ext_perm, 'uid' => $uid)); } ... } 当我们已经有一个参考文献($ this)时为什么需要

meaning of &$variable and &function?

Possible Duplicate: Reference - What does this symbol mean in PHP? what is the meaning of &$variable and meaning of functions like function &SelectLimit( $sql, $nrows=-1, $offset=-1, $inputarr=false, $secs2cache=0 ) { $rs =& $this->do_query( $sql, $offset, $nrows, $inputarr); return $rs; } Passing an argument like so: myFunc(&$var); means that the variable is

&$变量和&功能的含义?

可能重复: 参考 - 这个符号在PHP中的含义是什么? &$variable的含义是什么? 和功能的意义 function &SelectLimit( $sql, $nrows=-1, $offset=-1, $inputarr=false, $secs2cache=0 ) { $rs =& $this->do_query( $sql, $offset, $nrows, $inputarr); return $rs; } 像这样传递一个参数: myFunc(&$var); 意味着该变量通过引用传递(而不是通过值)。 因此,对函数中的变量所做的任何修改

What's difference?

This question already has an answer here: What does it mean to start a PHP function with an ampersand? 2 answers Adding an & before the functions' name means it will return a reference instead of copying the return value back to the caller. You can find all the gritty details in the documentation.

有什么区别?

这个问题在这里已经有了答案: 用&符号启动PHP函数是什么意思? 2个答案 在函数名称前加上&表示它将返回一个引用,而不是将返回值拷贝回调用者。 您可以在文档中找到所有砂砾细节。

What does prepending '&' to a function name mean in PHP?

This question already has an answer here: What does it mean to start a PHP function with an ampersand? 2 answers 这意味着函数应该返回一个对变量的引用,而不仅仅是该值本身。

在PHP中为函数名添加'&'是什么意思?

这个问题在这里已经有了答案: 用&符号启动PHP函数是什么意思? 2个答案 这意味着函数应该返回一个对变量的引用,而不仅仅是该值本身。

PHP references (ampersand)

This question already has an answer here: What does it mean to start a PHP function with an ampersand? 2 answers Returning by reference is useful when you want to use a function to find to which variable a reference should be bound. Do not use return-by-reference to increase performance. The engine will automatically optimize this on its own. Only return references when you have a valid t

PHP引用(&符)

这个问题在这里已经有了答案: 用&符号启动PHP函数是什么意思? 2个答案 当您想使用函数来查找引用应绑定到哪个变量时,通过引用返回很有用。 不要使用按引用返回来提高性能。 引擎会自动优化它。 只有当你有合理的技术理由才能返回参考。 要返回引用,请使用以下语法: 从PHP手册返回引用