This article focuses on configuration records, and the benefits of chroot (jail) will not be described in detail. This article is divided into three parts: configuring basic chroot jail, configuring chroot jail for nginx, and configuring chrootjail for tomcat. 1. Configure a basic chroot jail1.1. Create a directory as the root directory of the chroot jail. # mkdir /home/chroot/jail1.2. Use the ldd command to find out the dependent libraries of the command you want to run in the chroot jail. # ldd /bin/bash linux-vdso.so.1 => (0x00007fff56fcc000) libtinfo.so.5 => /lib64/libtinfo.so.5 (0x0000003ad1200000) libdl.so.2 => /lib64/libdl.so.2 (0x0000003abe600000) libc.so.6 => /lib64/l
1. nginx and tomcat use chroot (jail) related configuration
Introduction:: This article mainly introduces the configuration related to chroot (jail) used by nginx and tomcat. Students who are interested in PHP tutorials can refer to it.
2. php download system PHP security configuration method explained in Wood Wing Download System
Introduction: php download System: PHP download system PHP security configuration method explained in Muyi download system: 1. Web server security PHP is actually just a module function of the Web server, so the security of the Web server must be ensured first. Of course, in order for a web server to be secure, it must first ensure system security, which is a long way off. PHP can be combined with various web servers, and only Apache will be discussed here. It is highly recommended to install and start Apache in chroot mode. In this way, even if there are vulnerabilities in Apache, PHP and their scripts, only the restricted system will be affected and will not harm the actual system. But using chroot Apac
3. http://www.kaqima.com/index.ht PHP security configuration
Introduction: http://www.kaqima.com/index.ht: http://www.kaqima.com/index.ht PHP security configuration: PHP security configuration 1. Web server security PHP is actually just a Web server A module function, so the security of the web server must be ensured first. Of course, in order for a web server to be secure, it must first ensure system security, which is a long way off. PHP can be combined with various web servers, and only Apache will be discussed here. It is highly recommended to install and start Apache in chroot mode, so that even if there are vulnerabilities in Apache, PHP and their scripts, only this will be affected
Introduction: PHP-FPM Chroot execution environment detailed explanation, php-fpmchroot detailed explanation. Detailed explanation of PHP-FPM's Chroot execution environment. Detailed explanation of php-fpmchroot. Setting up chroot in PHP-FPM has a good isolation effect and improves system security. However, if you want to establish a reasonable PHP-FPM Chr
5. Learn the security protection knowledge of Apache server with examples
Introduction: PHP tutorial
6. Establish the Chroot execution environment of PHP-FPM
Introduction: Establish the Chroot execution environment of PHP-FPM
Introduction: PHP Security Configuration 1. Web server security PHP is actually just a module function of the web server, so the security of the web server must be ensured first. Of course, in order for a web server to be secure, it must first ensure system security, which is a long way off. PHP can be combined with various web servers, and only Apache will be discussed here. It is highly recommended to install and start Apache in chroot mode, so that even if there are vulnerabilities in Apache, PHP and their scripts, those affected will be
8. PHP urgently needed disabled functions
Introduction: PHP functions that need to be disabled disable_functions =gzinflate,passthru,exec,system,chroot,scandir,chgrp,chown,shell_exec,proc_open,proc_get_status,ini_alter,ini_alter,ini_restore,dl,pfsockopen,ope
##9. php urgently needs disabled functions
Introduction: PHP functions that need to be disabled disable_functions =gzinflate, passthru, exec, system, chroot, scandir, chgrp, chown, shell_exec, proc_open, proc_get_status, ini_alter, ini_alter, ini_restore, dl, pfsockopen, ope
10. PHP insurance configuration
Introduction: PHP security configuration 1. Web server security PHP is actually just a web server A module function, so the security of the web server must be ensured first. Of course, in order for a web server to be secure, it must first ensure system security, which is a long way off. PHP can be combined with various web servers, and only Apache will be discussed here. It is highly recommended to install and start Apache in chroot mode, so that even if there are vulnerabilities in Apache, PHP and their scripts, only
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php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

查找方法:1、用strpos(),语法“strpos("字符串值","查找子串")+1”;2、用stripos(),语法“strpos("字符串值","查找子串")+1”。因为字符串是从0开始计数的,因此两个函数获取的位置需要进行加1处理。


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