How to perform hexadecimal conversion and padding in php

How to perform base conversion and padding in php: 1. Convert binary to octal through binoct(); 2. Convert binary to decimal through bindec(); 3. Convert binary to decimal through binhex() Hexadecimal; 4. Convert octal to binary through octbin(); 5. Convert octal to decimal through octdec(); 6. Convert octal to hexadecimal through octhex(), etc.

The operating environment of this tutorial: windows7 system, PHP8.1 version, DELL G3 computer

As a loser programmer, I don’t have rich experience , just typing code blindly, but one day, I will also become a technical expert. Today I learned several functions for converting between dots and bases

Common bases:

二进制 　　   binary  　　　　　　----->  bin
八进制 　　   octal    　　　　　　----->  oct
十进制 　　   decimal　　　　　　----->  dec
十六进制 　　hexadecimal 　　　 ----->  hex

php provides functions for converting between several common bases

Convert binary to other bases

binoct();//转为八进制
bindec();//转为十进制
binhex();//转为十六进制

Convert octal to other bases

octbin();//转为二进制
octdec();//转为十进制
octhex();//转为十六进制

Convert decimal to other Base

decbin();//转为二进制
decoct();//转为八进制
dechex();转为十六进制

Convert hexadecimal to other bases

hexbin();转为二进制
hexoct();//转为八进制
hexdec();//转为十六进制

There are so many listed above, but I actually feel that they are of no use at all. For the above functions, you only need to remember bin , oct, dec, hex is enough. If you want to convert a base to b base, that is ab()

A simple example:

把二进制(bin)转为十进制(dec): bindec();

It’s that simple

But this may not meet our needs, so PHP provides us with a function that can truly convert whatever we want: base_convert();

base_convert() This function has three Parameter

string base_convert ( string $number , int $frombase , int $tobase )

Give an example:

$hexadecimal = '125458';//十进制
echo base_convert($hexadecimal, 10, 5);//转为五进制

Recommended learning: "PHP Video Tutorial"

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