function dec2bin ($dec) {
$flag = array();
while ($dec != 0) {
array_push($flag,$dec%2);
$dec = (int)($dec/2);
}
$binstr = '';
while (!empty($flag)) {
$binstr .= array_pop($flag);
}
return $binstr;
}
echo dec2bin(7);注意：以上只是为了练习。PHP已经有内嵌函数decbin()以及base_convert();
echo '<br/>'; echo base_convert(7,10,2); echo '<br/>'; echo base_convert(1111,2,8); echo '<br/>'; echo decbin(6);
![[Web front-end] Démarrage rapide de Node.js](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
