分享一组需要屏蔽的垃圾IP

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46.229.168.162
46.229.168.144
46.229.168.151
46.229.168.143
46.229.168.153
46.229.168.149
46.229.168.154
46.229.168.145
46.229.168.133
46.229.168.147
46.229.168.139
46.229.168.137
46.229.168.131
46.229.168.163
46.229.168.146
46.229.168.140
46.229.168.135
46.229.168.130
46.229.168.134
46.229.168.148
46.229.168.136
46.229.168.141
3.234.214.179
46.229.168.152
46.229.168.138
46.229.168.129
46.229.168.142
46.229.168.161
46.229.168.132
46.229.168.150

IPv6字符串表示最大长度（字符数）

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45个字符，数据库设计时存储IPv6需要 varchar(45)

45 characters.

You might expect an address to be

0000:0000:0000:0000:0000:0000:0000:0000

8 * 4 + 7 = 39

8 groups of 4 digits with 7 : between them.

But if you have an IPv4-mapped IPv6 address, the last two groups can be written in base 10 separated by ., eg. [::ffff:192.168.100.228]. Written out fully:

0000:0000:0000:0000:0000:ffff:192.168.100.228

(6 * 4 + 5) + 1 + (4 * 3 + 3) = 29 + 1 + 15 = 45

Note, this is an input/display convention – it’s still a 128 bit address and for storage it would probably be best to standardise on the raw colon separated format, i.e. [0000:0000:0000:0000:0000:ffff:c0a8:64e4] for the address above.

正则零宽断言

https://blog.csdn.net/u010801439/article/details/77921037

零宽断言表示匹配字符的时候再添加一些定位条件，使匹配更精准。

  • \w+(?=ing) 匹配以ing结尾的多个字符（不包括ing）
  • \w+(?!ing) 匹配不是以ing结尾的多个字符
  • (?<=re)\w+ 匹配以re开头的多个字符（不包括re）
  • (?<!re)\w+ 匹配不是以re开头的多个字符
  • (?<=\s)\d+(?=\s) 匹配两边是空白符的数字，不包括空白符

本文参考：https://www.w3cschool.cn/rxoyts/l17fcozt.html

正则表达式30分钟入门教程：

https://deerchao.cn/tutorials/regex/regex.htm

php编译问题

configure: error: jpeglib.h not found.

yum -y install libjpeg-devel

configure: error: xpm.h not found.

yum install libXpm-devel -y

configure: error: freetype-config not found.

yum install freetype-devel -y

configure: error: Unable to locate gmp.h

yum install gmp-devel -y