[TOC] ## base_convert 任意进制转换 ``` $hexadecimal = 'a'; echo base_convert($hexadecimal, 16, 10).PHP_EOL; // 10 echo base_convert($hexadecimal, 16, 2).PHP_EOL; //1010 echo base_convert($hexadecimal, 16, 8).PHP_EOL; //12 ```