PHP 16进制加密函数
2015-07-15 11:50
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// 转换16进制
bin2hex($str);
//恢复十六进制字符串
pack("H*",bin2hex($str));
page 解释 把数据装入一个二进制字符串。
A - SPACE-padded string
h - Hex string, low nibble first
H - Hex string, high nibble first
c - signed char
C - unsigned char
s - signed short (always 16 bit, machine byte order)
S - unsigned short (always 16 bit, machine byte order)
n - unsigned short (always 16 bit, big endian byte order)
v - unsigned short (always 16 bit, little endian byte order)
i - signed integer (machine dependent size and byte order)
I - unsigned integer (machine dependent size and byte order)
l - signed long (always 32 bit, machine byte order)
L - unsigned long (always 32 bit, machine byte order)
N - unsigned long (always 32 bit, big endian byte order)
V - unsigned long (always 32 bit, little endian byte order)
f - float (machine dependent size and representation)
d - double (machine dependent size and representation)
x - NUL byte
X - Back up one byte
@ - NUL-fill to absolute position
输出:
输出:
bin2hex($str);
//恢复十六进制字符串
pack("H*",bin2hex($str));
page 解释 把数据装入一个二进制字符串。
语法
pack(format,args+)
参数 | 描述 |
---|---|
format | 必需。规定在包装数据时所使用的格式。 |
args+ | 可选。规定被包装的一个或多个参数。 |
format 参数的可能值:
a - NUL-padded stringA - SPACE-padded string
h - Hex string, low nibble first
H - Hex string, high nibble first
c - signed char
C - unsigned char
s - signed short (always 16 bit, machine byte order)
S - unsigned short (always 16 bit, machine byte order)
n - unsigned short (always 16 bit, big endian byte order)
v - unsigned short (always 16 bit, little endian byte order)
i - signed integer (machine dependent size and byte order)
I - unsigned integer (machine dependent size and byte order)
l - signed long (always 32 bit, machine byte order)
L - unsigned long (always 32 bit, machine byte order)
N - unsigned long (always 32 bit, big endian byte order)
V - unsigned long (always 32 bit, little endian byte order)
f - float (machine dependent size and representation)
d - double (machine dependent size and representation)
x - NUL byte
X - Back up one byte
@ - NUL-fill to absolute position
例子
例子 1
<?php echo pack("C3",80,72,80); ?>
输出:
PHP
例子 2
<?php echo pack("C*",80,72,80); ?>
输出:
PHP
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