我正在阅读一个库(github.com/adduc/phpmodbus)并且有这个函数可以将整数转换为小端字节序或大端字节串:privatestaticfunctionendianness($value,$endianness=0){if($endianness==0)returnself::iecBYTE(($value>>8)&0x000000FF).self::iecBYTE(($value&0x000000FF)).self::iecBYTE(($value>>24)&0x000000FF).self::iecBYTE(($value>>16)&0x000000FF);else