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What Does This Mean in PHP -> or => [duplicate]

I see these in PHP all the time but I don't have a clue as to what they actually mean. What does -> do and what does => do. And I'm not talking about the operators. They're something else, but nobody seems to know... ...
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Best way to clear a PHP array's values

Which is more efficient for clearing all values in an array? The first one would require me to use that function each time in the loop of the second example. ...
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Foreign keys in mongo?

... UPD. I'am using PHP as a programming language, how can I use mongoid, if it is written in Ruby? – Mark Pegasov Jun 13 '11 at 17:54 ...
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simple explanation PHP OOP vs Procedural?

...sonal preference. OOP and Procedural programming are simply two main, generally-recognized methodologies, for how to organize and arrange those "chunks" of code. Long No-Jargon Answer: Procedural vs OOP is just one aspect of a fundamental issue of computer programming: how to make your code easy...
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CentOS+Nginx+PHP+MySQL详细配置(图解) - 更多技术 - 清泛网 - 专注C/C++及内核技术

CentOS+Nginx+PHP+MySQL详细配置(图解)一、安装MySQL 目前web服务器已经很少有跑静态页面的,如果要跑动态网站那当然就离不开数据库,虽然在以前文章中有写MySQL是怎么安装的...一、安装MySQL 目前web服务器已经很少有跑静态页...
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json_encode sparse PHP array as JSON array, not JSON object

...at is, if its keys are 0, 1, 2, 3, ... You can reindex your array sequentially using the array_values function to get the behaviour you want. For example, the code below works successfully in your use case: echo json_encode(array_values($input)). ...
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CentOS+Nginx+PHP+MySQL详细配置(图解) - PHP - 清泛IT论坛,有思想、有深度

...页请求,也就是html.如果是来自动态的网页请求,比如*.php,那么Nginx就要根据正则表达式查询路径,然后把*.PHP交给PHP去处理 #rpm -qa | grep pcre              //查询系统中有没有安装PCRE,一般装...
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“date(): It is not safe to rely on the system's timezone settings…”

I got this error when I requested to update the PHP version from 5.2.17 to PHP 5.3.21 on the server. 24 Answers ...
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Using crontab to execute script every minute and another every 24 hours [closed]

I need a crontab syntax which should execute a specific PHP script /var/www/html/a.php every minute. The execution on every minute must start at 00:00. The other task which must execute a script at 00:00 /var/www/html/reset.php (once every 24 hours). ...
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Regular Expression for alphanumeric and underscores

...o or more of the given characters $ : end of string If you don't want to allow empty strings, use + instead of *. As others have pointed out, some regex languages have a shorthand form for [a-zA-Z0-9_]. In the .NET regex language, you can turn on ECMAScript behavior and use \w as a shorthand (y...