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log_errors display_errors

Posted by 夏泽民 Aug 19, 2020

display_errors,开启log_errors,配置error_log路径 1）display_error

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int 比 intval 性能高出3至6倍

Posted by 夏泽民 Aug 19, 2020

OPCODE 进行了分析，解释了其深层原因

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extract eval

Posted by 夏泽民 Aug 19, 2020

@extract($a); //extract() 函数从数组中把变量导入到当前的符号表中

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expose_php

Posted by 夏泽民 Aug 19, 2020

https://manual.phpdoc.org/ expose_php boolean 决定是否暴露 PHP 被安装在服务器上（例如在 Web 服务器的信息头中加上其签名：X-Powered-By: PHP/5.3.7)。 The PHP logo guids are also exposed, thus appending them to the URL of a PHP enabled site will display the appropriate logo (e.g., » https://www.php.net/?=PHPE9568F34-D428-11d2-A769-00AA001ACF42). This also affects the output of phpinfo(), as when disabled, the PHP logo and credits information will not be displayed. https://www.php.net/manual/zh/ini.core.php 一、如何触发PHP彩蛋？ 我们只要在运行PHP的服务器上，在域名后面输入下面的字符参数，就能返回一些意想不到的信息。当然有些服务器是把菜单屏蔽了的。彩蛋只有这4个，PHP是开放源代码的，所以不必担心还有其他。

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escapeshellarg

Posted by 夏泽民 Aug 19, 2020

(PHP 4 >= 4.0.3, PHP 5, PHP 7)

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