怎么将php数据转换为二进制数据
将php数据转换为二进制数据的方法:首先创建一个PHP示例文件;然后输入转换代码为“string pack ( string $format [, mixed $args [, mixed $...]] )”即可。
怎么将php数据转换为二进制数据?
将php数据转换为二进制数据
string pack ( string $format [, mixed $args [, mixed $...]] )
将二进制数据转换为php数据
array unpack ( string $format, string $data )
$format:
a – NUL-padded string
a – NUL- 字符串填满[padded string]
A – SPACE-padded string
A – SPACE- 字符串填满[padded string]
h – Hex string, low nibble first
h – 十六进制字符串,低“四位元”[low nibble first]
H – Hex string, high nibble first
H – 十六进制字符串,高“四位元”[high nibble first]
c – signed char
c – 带有符号的字符
C – unsigned char
C – 不带有符号的字符
s – signed short (always 16 bit, machine byte order)
s – 带有符号的短模式[short](通常是16位,按机器字节顺序)
S – unsigned short (always 16 bit, machine byte order)
S – 不带有符号的短模式[short](通常是16位,按机器字节排序)
n – unsigned short (always 16 bit, big endian byte order)
n -不带有符号的短模式[short](通常是16位,按大endian字节排序)
v – unsigned short (always 16 bit, little endian byte order)
v -不带有符号的短模式[short](通常是16位,按小endian字节排序)
i – signed integer (machine dependent size and byte order)
i – 带有符号的整数(由大小和字节顺序决定)
I – unsigned integer (machine dependent size and byte order)
I – 不带有符号的整数(由大小和字节顺序决定)
l – signed long (always 32 bit, machine byte order)
l– 带有符号的长模式[long](通常是32位,按机器字节顺序)
L – unsigned long (always 32 bit, machine byte order)
L – 不带有符号的长模式[long](通常是32位,按机器字节顺序)
N – unsigned long (always 32 bit, big endian byte order)
N – 不带有符号的长模式[long](通常是32位,按大edian字节顺序)
V – unsigned long (always 32 bit, little endian byte order)
V– 不带有符号的长模式[long](通常是32位,按小edian字节顺序)
f – float (machine dependent size and representation)
f –浮点(由大小和字节顺序决定)
d – double (machine dependent size and representation)
d – 双精度(由大小和字节顺序决定)
x – NUL byte
x – 空字节[NUL byte]
X – Back up one byte
X- 后面一个字节[Back up one byte]
Z 一个空结束的(和空填充的)字节串
@ – NUL-fill to absolute position
@ – NUL- 添加到一个绝对位置[absolute position] //实际使用的时候作为从开头跳到某字节用,很有用
字符串中会出现“\0”,此为C语言的字符串结束符,需要手工将其删掉:
$name = strtok($name, "\0");
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