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IP Spoofing

post @ 2023-06-25

IP Spoofing

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Client-IP:127.0.0.1
Forwarded-For-Ip: 127.0.0.1
Forwarded-For: 127.0.0.1
Forwarded-For: localhost
Forwarded:127.0.0.1
Forwarded: localhost
True-Client-IP:127.0.0.1
X-Client-IP: 127.0.0.1
X-Custom-IP-Authorization : 127.0.0.1
X-Forward-For: 127.0.0.1
X-Forward: 127.0.0.1
X-Forward: localhost
X-Forwarded-By:127.0.0.1
X-Forwarded-By: localhost
X-Forwarded-For-Original: 127.0.0.1
X-Forwarded-For-original: localhost
X-Forwarded-For: 127.0.0.1
X-Forwarded-For: localhost
X-Forwarded-Server: 127.0.0.1
X-Forwarded-Server: localhost
X-Forwarded: 127.0.0.1
X-Forwarded: localhost
X-Forwared-Host: 127.0.0.1
X-Forwared-Host: localhost
X-Host: 127.0.0.1
X-Host: localhost
X-HTTP-Host-Override : 127.0.0.1
X-Originating-IP: 127.0.0.1
X-Real-IP: 127.0.0.1
X-Remote-Addr: 127.0.0.1
X-Remote-Addr : localhost
X-Remote-IP: 127.0.0.1
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Php Hash Compare

post @ 2023-06-20

Php Hash Compare

散列算法（Hash Algorithm），是一种从任意文件中创造小的数字「指纹」的方法。常见 Hash 算法有 MD5 和 SHA 系列：MD5 和 SHA1 ，SHA2-256 算法。

Php 特性

Php字符串比较

字符串 与 字符串：判断值是否相等。

字符串 与 数值：判断字符串第一个字母前的数字是否与比较的数值相等。

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var_dump("123a"==123)   //bool(ture)
var_dump("123a"=="123") //bool(false)

松散比较 (==)

松散 TRUE FALSE 1 0 -1 “1” “0” “-1” NULL array() “php” “”
TRUE TRUE FALSE TRUE FALSE TRUE TRUE FALSE TRUE FALSE FALSE TRUE FALSE
FALSE FALSE TRUE FALSE TRUE FALSE FALSE TRUE FALSE TRUE TRUE FALSE TRUE
1 TRUE FALSE TRUE FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE FALSE
0 FALSE TRUE FALSE TRUE FALSE FALSE TRUE FALSE TRUE FALSE TRUE TRUE
-1 TRUE FALSE FALSE FALSE TRUE FALSE FALSE TRUE FALSE FALSE FALSE FALSE
“1” TRUE FALSE TRUE FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE FALSE
“0” FALSE TRUE FALSE TRUE FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE
“-1” TRUE FALSE FALSE FALSE TRUE FALSE FALSE TRUE FALSE FALSE FALSE FALSE
NULL FALSE TRUE FALSE TRUE FALSE FALSE FALSE FALSE TRUE TRUE FALSE TRUE
array() FALSE TRUE FALSE FALSE FALSE FALSE FALSE FALSE TRUE TRUE FALSE FALSE
“php” TRUE FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE FALSE TRUE FALSE
“” FALSE TRUE FALSE TRUE FALSE FALSE FALSE FALSE TRUE FALSE FALSE TRUE

严格比较 (===)

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